Merge low-level ACPICA interface changes, an _SB-scope _OSC handshake
update and a data-only ACPI tables parsing code update for 6.8-rc1:
- Switch over ACPI to using a threaded interrupt handler for the
SCI (Rafael J. Wysocki).
- Allow ACPI Notify () handlers to run on all CPUs and clean up the
ACPI interface for deferred events processing (Rafael J. Wysocki).
- Switch over the ACPI EC driver to using a threaded handler for the
dedicated IRQ on systems without the EC GPE (Rafael J. Wysocki).
- Adjust code using ACPICA spinlocks and the ACPI EC driver spinlock to
keep local interrupts on (Rafael J. Wysocki).
- Adjust the USB4 _OSC handshake to correctly handle cases in which
certain types of OS control are denied by the platform (Mika
Westerberg).
- Correct and clean up the generic function for parsing ACPI data-only
tables with array structure (Yuntao Wang).
* acpi-osl:
ACPI: EC: Use a spin lock without disabing interrupts
ACPI: EC: Use a threaded handler for dedicated IRQ
ACPI: OSL: Use spin locks without disabling interrupts
ACPI: OSL: Allow Notify () handlers to run on all CPUs
ACPI: OSL: Rearrange workqueue selection in acpi_os_execute()
ACPI: OSL: Rework error handling in acpi_os_execute()
ACPI: OSL: Use a threaded interrupt handler for SCI
* acpi-bus:
ACPI: Run USB4 _OSC() first with query bit set
* acpi-tables:
ACPI: tables: Correct and clean up the logic of acpi_parse_entries_array()
The KUnit device helpers are documented with kerneldoc in their header
file, but also have short comments over their implementation. These were
mistakenly formatted as kerneldoc comments, even though they're not
valid kerneldoc. It shouldn't cause any serious problems -- this file
isn't included in the docs -- but it could be confusing, and causes
warnings.
Remove the extra '*' so that these aren't treated as kerneldoc.
Fixes: d03c720e03 ("kunit: Add APIs for managing devices")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202312181920.H4EPAH20-lkp@intel.com/
Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Adds a variant of example_static_stub_test() that shows use of a
pointer-to-function with kunit_activate_static_stub().
A const pointer to the add_one() function is declared. This
pointer-to-function is passed to kunit_activate_static_stub() and
kunit_deactivate_static_stub() instead of passing add_one directly.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
suite->log must be checked for NULL before passing it to
string_stream_clear(). This was done in kunit_init_test() but was missing
from kunit_init_suite().
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: 6d696c4695c5 ("kunit: add ability to run tests after boot using debugfs")
Reviewed-by: Rae Moar <rmoar@google.com>
Acked-by: David Gow <davidgow@google.com>
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
asm-generic/io.h can be replaced with linux/io.h and the file will still
build correctly. It is an asm-generic file which should be avoided if
possible.
Link: https://lkml.kernel.org/r/20231221-tracereadwrite-v1-1-a434f25180c7@google.com
Signed-off-by: Tanzir Hasan <tanzirh@google.com>
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
crc_ccitt_false() was introduced in commit 0d85adb5fb ("lib/crc-ccitt:
Add CCITT-FALSE CRC16 variant"), but it is redundant with crc_itu_t().
Since the latter is more used, it is the one being kept.
Link: https://lkml.kernel.org/r/20231219131154.748577-1-Mathis.Marion@silabs.com
Signed-off-by: Mathis Marion <mathis.marion@silabs.com>
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Andrey Vostrikov <andrey.vostrikov@cogentembedded.com>
Cc: Jérôme Pouiller <jerome.pouiller@silabs.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
DEBUG_STACK_USAGE doesn't only have an influence on the output of sysrq-T
and sysrq-P, it also enables a message at process exit. See
check_stack_usage() in kernel/exit.c where this is implemented.
Link: https://lkml.kernel.org/r/20231219182808.210284-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Douglas Anderson <dianders@chromium.org>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Kees Cook <keescook@chromium.org>
Cc: Marco Elver <elver@google.com>
Cc: "Paul E. McKenney" <paulmck@kernel.org>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "lib/stackdepot, kasan: fixes for stack eviction series", v3.
A few fixes for the stack depot eviction series ("stackdepot: allow
evicting stack traces").
This patch (of 5):
Stack depot functions can be called from various contexts that do
allocations, including with console locks taken. At the same time, stack
depot functions might print WARNING's or refcount-related failures.
This can cause a deadlock on console locks.
Add printk_deferred_enter/exit guards to stack depot to avoid this.
Link: https://lkml.kernel.org/r/cover.1703020707.git.andreyknvl@google.com
Link: https://lkml.kernel.org/r/82092f9040d075a161d1264377d51e0bac847e8a.1703020707.git.andreyknvl@google.com
Fixes: 108be8def4 ("lib/stackdepot: allow users to evict stack traces")
Fixes: cd11016e5f ("mm, kasan: stackdepot implementation. Enable stackdepot for SLAB")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reported-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Closes: https://lore.kernel.org/all/000000000000f56750060b9ad216@google.com/
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)
Remove empty sentinel element from test_table and test_table_unregister.
Signed-off-by: Joel Granados <j.granados@samsung.com>
Acked-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
Basic test to ensure that empty directories can be registered and that
they in turn can serve as a base dir for other registrations.
Add one test to the sysctl selftest module. It first registers an empty
directory under "empty_add" and then uses that as a base to register
another empty dir.
The sysctl bash script then checks that "empty_add" is present and that
there an empty directory within it.
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
are not considered backporting material.
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZYys4AAKCRDdBJ7gKXxA
jtmaAQC+o04Ia7IfB8MIqp1p7dNZQo64x/EnGA8YjUnQ8N6IwQD+ImU7dHl9g9Oo
ROiiAbtMRBUfeJRsExX/Yzc1DV9E9QM=
=ZGcs
-----END PGP SIGNATURE-----
Merge tag 'mm-hotfixes-stable-2023-12-27-15-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"11 hotfixes. 7 are cc:stable and the other 4 address post-6.6 issues
or are not considered backporting material"
* tag 'mm-hotfixes-stable-2023-12-27-15-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
mailmap: add an old address for Naoya Horiguchi
mm/memory-failure: cast index to loff_t before shifting it
mm/memory-failure: check the mapcount of the precise page
mm/memory-failure: pass the folio and the page to collect_procs()
selftests: secretmem: floor the memory size to the multiple of page_size
mm: migrate high-order folios in swap cache correctly
maple_tree: do not preallocate nodes for slot stores
mm/filemap: avoid buffered read/write race to read inconsistent data
kunit: kasan_test: disable fortify string checker on kmalloc_oob_memset
kexec: select CRYPTO from KEXEC_FILE instead of depending on it
kexec: fix KEXEC_FILE dependencies
by moving cond_resched_rcu() to rcupdate_wait.h, we can kill another big
sched.h dependency.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
The CDAT table is very similar to ACPI tables when it comes to sub-table
and entry structures. The helper functions can be also used to parse the
CDAT table. Add support to the helper functions to deal with an external
CDAT table, and also handle the endieness since CDAT can be processed by a
BE host. Export a function cdat_table_parse() for CXL driver to parse
a CDAT table.
In order to minimize ACPICA code changes, __force is being utilized to deal
with the case of a big endian (BE) host parsing a CDAT. All CDAT data
structure variables are being force casted to __leX as appropriate.
Cc: Rafael J. Wysocki <rafael@kernel.org>
Cc: Len Brown <lenb@kernel.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/170319615131.2212653.10932785667981494238.stgit@djiang5-mobl3
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
When the mpi_ec_ctx structure is initialized, some fields are not
cleared, causing a crash when referencing the field when the
structure was released. Initially, this issue was ignored because
memory for mpi_ec_ctx is allocated with the __GFP_ZERO flag.
For example, this error will be triggered when calculating the
Za value for SM2 separately.
Fixes: d58bb7e55a ("lib/mpi: Introduce ec implementation to MPI library")
Cc: stable@vger.kernel.org # v6.5
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The IDA usually detects double-frees, but that detection failed to
consider the case when there are no nearby IDs allocated and so we have a
NULL bitmap rather than simply having a clear bit. Add some tests to the
test-suite to be sure we don't inadvertently reintroduce this problem.
Unfortunately they're quite noisy so include a message to disregard
the warnings.
Reported-by: Zhenghan Wang <wzhmmmmm@gmail.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The Kconfig help text for CONFIG_KCOV describes that recorded PC values
will not be stable across machines or reboots when RANDOMIZE_BASE is
selected. This was the case when KCOV was introduced in commit:
5c9a8750a6 ("kernel: add kcov code coverage")
However, this changed in commit:
4983f0ab7f ("kcov: make kcov work properly with KASLR enabled")
Since that commit KCOV always subtracts the KASLR offset from PC values,
which ensures that these are stable across machines and across reboots
even when RANDOMIZE_BASE is selected.
Unfortunately, that commit failed to update the Kconfig help text, which
still suggests disabling RANDOMIZE_BASE even though this is no longer
necessary.
Remove the stale Kconfig text.
Link: https://lkml.kernel.org/r/20231204171807.3313022-1-mark.rutland@arm.com
Reported-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Popov <alex.popov@linux.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Use the same splat markers as panic does for easier matching by external
tools scanning kernel dmesg for splats.
Link: https://lkml.kernel.org/r/20231218135339.23209-1-bp@alien8.de
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The last range stored in maple tree is typically quite large. By checking
if it exceeds the sum of the remaining ranges in that node, it is possible
to avoid checking all other gaps.
Running the maple tree test suite in user mode almost always results in a
near 100% hit rate for this optimization.
Link: https://lkml.kernel.org/r/20231215074632.82045-1-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Fix typos/grammar and spellos in documentation.
Link: https://lkml.kernel.org/r/20231210063839.29967-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Commit 0de56e38b3 ("maple_tree: use maple state end for write
operations") was broken by a later patch "maple_tree: do not preallocate
nodes for slot stores". But the later patch was scheduled ahead of
0de56e38b3, for 6.7-rc.
This fixlet undoes the damage.
Fixes: 0de56e38b3 ("maple_tree: use maple state end for write operations")
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mas_preallocate() defaults to requesting 1 node for preallocation and then
,depending on the type of store, will update the request variable. There
isn't a check for a slot store type, so slot stores are preallocating the
default 1 node. Slot stores do not require any additional nodes, so add a
check for the slot store case that will bypass node_count_gfp(). Update
the tests to reflect that slot stores do not require allocations.
User visible effects of this bug include increased memory usage from the
unneeded node that was allocated.
Link: https://lkml.kernel.org/r/20231213205058.386589-1-sidhartha.kumar@oracle.com
Fixes: 0b8bb544b1 ("maple_tree: update mas_preallocate() testing")
Signed-off-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: <stable@vger.kernel.org> [6.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
-----BEGIN PGP SIGNATURE-----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=stU2
-----END PGP SIGNATURE-----
Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Alexei Starovoitov says:
====================
pull-request: bpf-next 2023-12-18
This PR is larger than usual and contains changes in various parts
of the kernel.
The main changes are:
1) Fix kCFI bugs in BPF, from Peter Zijlstra.
End result: all forms of indirect calls from BPF into kernel
and from kernel into BPF work with CFI enabled. This allows BPF
to work with CONFIG_FINEIBT=y.
2) Introduce BPF token object, from Andrii Nakryiko.
It adds an ability to delegate a subset of BPF features from privileged
daemon (e.g., systemd) through special mount options for userns-bound
BPF FS to a trusted unprivileged application. The design accommodates
suggestions from Christian Brauner and Paul Moore.
Example:
$ sudo mkdir -p /sys/fs/bpf/token
$ sudo mount -t bpf bpffs /sys/fs/bpf/token \
-o delegate_cmds=prog_load:MAP_CREATE \
-o delegate_progs=kprobe \
-o delegate_attachs=xdp
3) Various verifier improvements and fixes, from Andrii Nakryiko, Andrei Matei.
- Complete precision tracking support for register spills
- Fix verification of possibly-zero-sized stack accesses
- Fix access to uninit stack slots
- Track aligned STACK_ZERO cases as imprecise spilled registers.
It improves the verifier "instructions processed" metric from single
digit to 50-60% for some programs.
- Fix verifier retval logic
4) Support for VLAN tag in XDP hints, from Larysa Zaremba.
5) Allocate BPF trampoline via bpf_prog_pack mechanism, from Song Liu.
End result: better memory utilization and lower I$ miss for calls to BPF
via BPF trampoline.
6) Fix race between BPF prog accessing inner map and parallel delete,
from Hou Tao.
7) Add bpf_xdp_get_xfrm_state() kfunc, from Daniel Xu.
It allows BPF interact with IPSEC infra. The intent is to support
software RSS (via XDP) for the upcoming ipsec pcpu work.
Experiments on AWS demonstrate single tunnel pcpu ipsec reaching
line rate on 100G ENA nics.
8) Expand bpf_cgrp_storage to support cgroup1 non-attach, from Yafang Shao.
9) BPF file verification via fsverity, from Song Liu.
It allows BPF progs get fsverity digest.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (164 commits)
bpf: Ensure precise is reset to false in __mark_reg_const_zero()
selftests/bpf: Add more uprobe multi fail tests
bpf: Fail uprobe multi link with negative offset
selftests/bpf: Test the release of map btf
s390/bpf: Fix indirect trampoline generation
selftests/bpf: Temporarily disable dummy_struct_ops test on s390
x86/cfi,bpf: Fix bpf_exception_cb() signature
bpf: Fix dtor CFI
cfi: Add CFI_NOSEAL()
x86/cfi,bpf: Fix bpf_struct_ops CFI
x86/cfi,bpf: Fix bpf_callback_t CFI
x86/cfi,bpf: Fix BPF JIT call
cfi: Flip headers
selftests/bpf: Add test for abnormal cnt during multi-kprobe attachment
selftests/bpf: Don't use libbpf_get_error() in kprobe_multi_test
selftests/bpf: Add test for abnormal cnt during multi-uprobe attachment
bpf: Limit the number of kprobes when attaching program to multiple kprobes
bpf: Limit the number of uprobes when attaching program to multiple uprobes
bpf: xdp: Register generic_kfunc_set with XDP programs
selftests/bpf: utilize string values for delegate_xxx mount options
...
====================
Link: https://lore.kernel.org/r/20231219000520.34178-1-alexei.starovoitov@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
If we run parameterized test that uses test->priv to prepare some
custom data, then value of test->priv will leak to the next param
iteration and may be unexpected. This could be easily seen if
we promote example_priv_test to parameterized test as then only
first test iteration will be successful:
$ ./tools/testing/kunit/kunit.py run \
--kunitconfig ./lib/kunit/.kunitconfig *.example_priv*
[ ] Starting KUnit Kernel (1/1)...
[ ] ============================================================
[ ] =================== example (1 subtest) ====================
[ ] ==================== example_priv_test ====================
[ ] [PASSED] example value 3
[ ] # example_priv_test: initializing
[ ] # example_priv_test: ASSERTION FAILED at lib/kunit/kunit-example-test.c:230
[ ] Expected test->priv == ((void *)0), but
[ ] test->priv == 0000000060dfe290
[ ] ((void *)0) == 0000000000000000
[ ] # example_priv_test: cleaning up
[ ] [FAILED] example value 2
[ ] # example_priv_test: initializing
[ ] # example_priv_test: ASSERTION FAILED at lib/kunit/kunit-example-test.c:230
[ ] Expected test->priv == ((void *)0), but
[ ] test->priv == 0000000060dfe290
[ ] ((void *)0) == 0000000000000000
[ ] # example_priv_test: cleaning up
[ ] [FAILED] example value 1
[ ] # example_priv_test: initializing
[ ] # example_priv_test: ASSERTION FAILED at lib/kunit/kunit-example-test.c:230
[ ] Expected test->priv == ((void *)0), but
[ ] test->priv == 0000000060dfe290
[ ] ((void *)0) == 0000000000000000
[ ] # example_priv_test: cleaning up
[ ] [FAILED] example value 0
[ ] # example_priv_test: initializing
[ ] # example_priv_test: cleaning up
[ ] # example_priv_test: pass:1 fail:3 skip:0 total:4
[ ] ================ [FAILED] example_priv_test ================
[ ] # example: initializing suite
[ ] # module: kunit_example_test
[ ] # example: exiting suite
[ ] # Totals: pass:1 fail:3 skip:0 total:4
[ ] ===================== [FAILED] example =====================
Fix that by resetting test->priv after each param iteration, in
similar way what we did for the test->status.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: David Gow <davidgow@google.com>
Cc: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
In a test->priv field the user can store arbitrary data.
Add example how to use this feature in the test code.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: David Gow <davidgow@google.com>
Cc: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Using struct root_device to create fake devices for tests is something
of a hack. The new struct kunit_device is meant for this purpose, so use
it instead.
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Using struct root_device to create fake devices for tests is something
of a hack. The new struct kunit_device is meant for this purpose, so use
it instead.
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Tests for drivers often require a struct device to pass to other
functions. While it's possible to create these with
root_device_register(), or to use something like a platform device, this
is both a misuse of those APIs, and can be difficult to clean up after,
for example, a failed assertion.
Add some KUnit-specific functions for registering and unregistering a
struct device:
- kunit_device_register()
- kunit_device_register_with_driver()
- kunit_device_unregister()
These helpers allocate a on a 'kunit' bus which will either probe the
driver passed in (kunit_device_register_with_driver), or will create a
stub driver (kunit_device_register) which is cleaned up on test shutdown.
Devices are automatically unregistered on test shutdown, but can be
manually unregistered earlier with kunit_device_unregister() in order
to, for example, test device release code.
Reviewed-by: Matti Vaittinen <mazziesaccount@gmail.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: David Gow <davidgow@google.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add functionality to run built-in tests after boot by writing to a
debugfs file.
Add a new debugfs file labeled "run" for each test suite to use for
this purpose.
As an example, write to the file using the following:
echo "any string" > /sys/kernel/debugfs/kunit/<testsuite>/run
This will trigger the test suite to run and will print results to the
kernel log.
To guard against running tests concurrently with this feature, add a
mutex lock around running kunit. This supports the current practice of
not allowing tests to be run concurrently on the same kernel.
This new functionality could be used to design a parameter
injection feature in the future.
Fixed up merge conflict duing rebase to Linux 6.7-rc6
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add is_init test attribute of type bool. Add to_string, get, and filter
methods to lib/kunit/attributes.c.
Mark each of the tests in the init section with the is_init=true attribute.
Add is_init to the attributes documentation.
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add example_init_test_suite to allow for testing the feature of running
test suites marked as init to indicate they use init data and/or
functions.
This suite should always pass and uses a simple init function.
This suite can also be used to test the is_init attribute introduced in
the next patch.
Signed-off-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add KUNIT_INIT_TABLE to the INIT_DATA linker section.
Alter the KUnit macros to create init tests:
kunit_test_init_section_suites
Update lib/kunit/executor.c to run both the suites in KUNIT_TABLE and
KUNIT_INIT_TABLE.
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
In kunit_debugfs_create_suite() give up and skip creating the debugfs
file if any of the alloc_string_stream() calls return an error or NULL.
Only put a value in the log pointer of kunit_suite and kunit_test if it
is a valid pointer to a log.
This prevents the potential invalid dereference reported by smatch:
lib/kunit/debugfs.c:115 kunit_debugfs_create_suite() error: 'suite->log'
dereferencing possible ERR_PTR()
lib/kunit/debugfs.c:119 kunit_debugfs_create_suite() error: 'test_case->log'
dereferencing possible ERR_PTR()
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Fixes: 05e2006ce4 ("kunit: Use string_stream for test log")
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Move the call to kunit_suite_has_succeeded() after the check that
the kunit_suite pointer is valid.
This was found by smatch:
lib/kunit/debugfs.c:66 debugfs_print_results() warn: variable
dereferenced before check 'suite' (see line 63)
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Fixes: 38289a26e1 ("kunit: fix debugfs code to use enum kunit_status, not bool")
Reviewed-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Check the stream pointer passed to string_stream_destroy() for
IS_ERR_OR_NULL() instead of only NULL.
Whatever alloc_string_stream() returns should be safe to pass
to string_stream_destroy(), and that will be an ERR_PTR.
It's obviously good practise and generally helpful to also check
for NULL pointers so that client cleanup code can call
string_stream_destroy() unconditionally - which could include
pointers that have never been set to anything and so are NULL.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Passing a gfp_t to KUNIT_EXPECT_EQ() causes a cast warning:
lib/kunit/string-stream-test.c:73:9: sparse: sparse: incorrect type in
initializer (different base types) expected long long right_value
got restricted gfp_t const __right
Avoid this by testing stream->gfp for the expected value and passing the
boolean result of this comparison to KUNIT_EXPECT_TRUE(), as was already
done a few lines above in string_stream_managed_init_test().
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Fixes: d1a0d699bf ("kunit: string-stream: Add tests for freeing resource-managed string_stream")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311181918.0mpCu2Xh-lkp@intel.com/
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
KUnit's deferred action API accepts a void(*)(void *) function pointer
which is called when the test is exited. However, we very frequently
want to use existing functions which accept a single pointer, but which
may not be of type void*. While this is probably dodgy enough to be on
the wrong side of the C standard, it's been often used for similar
callbacks, and gcc's -Wcast-function-type seems to ignore cases where
the only difference is the type of the argument, assuming it's
compatible (i.e., they're both pointers to data).
However, clang 16 has introduced -Wcast-function-type-strict, which no
longer permits any deviation in function pointer type. This seems to be
because it'd break CFI, which validates the type of function calls.
This rather ruins our attempts to cast functions to defer them, and
leaves us with a few options. The one we've chosen is to implement a
macro which will generate a wrapper function which accepts a void*, and
casts the argument to the appropriate type.
For example, if you were trying to wrap:
void foo_close(struct foo *handle);
you could use:
KUNIT_DEFINE_ACTION_WRAPPER(kunit_action_foo_close,
foo_close,
struct foo *);
This would create a new kunit_action_foo_close() function, of type
kunit_action_t, which could be passed into kunit_add_action() and
similar functions.
In addition to defining this macro, update KUnit and its tests to use
it.
Link: https://github.com/ClangBuiltLinux/linux/issues/1750
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This code is rarely (never?) enabled by distros, and it hasn't caught
anything in decades. Let's kill off this legacy debug code.
Suggested-by: Linus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mas_split_final_node() always returns true and its return value is never
checked.
Change return type to void.
Link: https://lkml.kernel.org/r/20231109160821.16248-2-ppbuk5246@gmail.com
Signed-off-by: Levi Yun <ppbuk5246@gmail.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Now it seems that the incoming 'end' is already pointing to the last item,
so we can simplify this function, considering only whether the last slot
is being used. This has passed the maple tree test suite.
Link: https://lkml.kernel.org/r/20231120070937.35481-6-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
There are two identical checks, delete one of them.
Link: https://lkml.kernel.org/r/20231120070937.35481-5-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The parameter maple_type is not used, so remove it.
Link: https://lkml.kernel.org/r/20231120070937.35481-4-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
When the child node is the first child of its parent node, mas->min does
not need to be updated. This can reduce the number of ascending times
in some cases.
Link: https://lkml.kernel.org/r/20231120070937.35481-3-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The function are defined in the maple_tree.c file, but not called
elsewhere, so delete the unused function.
lib/maple_tree.c:689:29: warning: unused function 'mas_pivot'.
Link: https://lkml.kernel.org/r/20231027084944.24888-1-jiapeng.chong@linux.alibaba.com
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=7064
Acked-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mtree_range_walk() needed to be updated to avoid checking if there was a
pivot value. On closer examination, the code could avoid setting min or
max in certain scenarios. The commit removes the extra check for
pivot[offset] before setting max and only sets max when necessary. It
also only sets min if it is necessary by checking offset 0 prior to the
loop (as it has always done).
The commit also drops a dead node check since the end of the node will
return the array size when the last slot is occupied (by a potential reuse
in a dead node). The data will be discarded later if the node is marked
dead.
Benchmarking these changes results in an increase in performance of 5.45%
using the BENCH_WALK in the maple tree test code.
Link: https://lkml.kernel.org/r/20231101171629.3612299-13-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Since the pivot being set is now reliable, the optimized loop no longer
needs to find the node end. The redundant check for a dead node can also
be avoided as there is no danger of using the wrong pivot since the
results will be thrown out in the case of a dead node by the later check.
This patch also adds a benchmark test for the function to the maple tree
test framework. The benchmark shows an average increase performance of
5.98% over 3 runs with this commit.
Link: https://lkml.kernel.org/r/20231101171629.3612299-12-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
ma_wr_state was previously tracking the end of the node for writing.
Since the implementation of the ma_state end tracking, this is duplicated
work. This patch removes the maple write state tracking of the end of the
node and uses the maple state end instead.
Link: https://lkml.kernel.org/r/20231101171629.3612299-11-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Now that the status of the maple state is outside of the node, the
mas_searchable() function can be dropped for easier open-coding of what is
going on.
Link: https://lkml.kernel.org/r/20231101171629.3612299-10-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
There are a few functions which were inlined but are somewhat too large to
inline, so remove the inline key word.
There are also several very small functions which are used in critical
code sections which gcc was not inlining, so make this more strict and use
__always_line for these functions.
Link: https://lkml.kernel.org/r/20231101171629.3612299-8-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The node end is set during the walk, so use the resulting end instead of
re-fetching it.
Link: https://lkml.kernel.org/r/20231101171629.3612299-7-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
When looking for the next entry, don't recalculate the node end as it is
now tracked in the maple state.
Link: https://lkml.kernel.org/r/20231101171629.3612299-6-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Analysis of the mas_for_each() iteration showed that there is a
significant time spent finding the end of a node. This time can be
greatly reduced if the end of the node is cached in the maple state. Care
must be taken to update & invalidate as necessary.
Link: https://lkml.kernel.org/r/20231101171629.3612299-5-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mas_erase() may not deal correctly with all maple states. Make the
function more robust by ensuring the state is in one of the two acceptable
states.
Link: https://lkml.kernel.org/r/20231101171629.3612299-3-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "maple_tree: iterator state changes".
These patches have some general cleanup and a change to separate the maple
state status tracking from the maple state node.
The maple state status change allows for walks to continue from previous
places when the status needs to be recorded to make logical sense for the
next call to the maple state. For instance, it allows for prev/next to
function in a way that better resembles the linked list. It also allows
switch statements to be used to detect missed states during compile, and
the addition of fast-path "active" state is cleaner as an enum.
While making the status change, perf showed some very small (one line)
functions that were not inlined even with the inline key word. Making
these small functions __always_inline is less expensive according to perf.
As part of that change, some inlines have been dropped from larger
functions.
Perf also showed that the commonly used mas_for_each() iterator was
spending a lot of time finding the end of the node. This series
introduces caching of the end of the node in the maple state (and updating
it during writes). This caching along with the inline changes yielded at
23.25% improvement on the BENCH_MAS_FOR_EACH maple tree test framework
benchmark.
I've also included a change to mtree_range_walk and mtree_lookup_walk to
take advantage of Peng's change [1] to the initial pivot setup.
mmtests did not produce any significant gains.
[1] https://lore.kernel.org/all/20230711035444.526-1-zhangpeng.00@bytedance.com/T/#u
This patch (of 12):
Removing the default types from the switch statements will cause compile
warnings on missing cases.
Link: https://lkml.kernel.org/r/20231101171629.3612299-2-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Suggested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Get rid of MACHINE_HAS_VX and replace it with cpu_has_vx() which is a
short readable wrapper for "test_facility(129)".
Facility bit 129 is set if the vector facility is present. test_facility()
returns also true for all bits which are set in the architecture level set
of the cpu that the kernel is compiled for. This means that
test_facility(129) is a compile time constant which returns true for z13
and later, since the vector facility bit is part of the z13 kernel ALS.
In result the compiled code will have less runtime checks, and less code.
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Patch series "Treewide: enable -Wmissing-prototypes", v3.
At this point, there are five architectures with a number of known
regressions: alpha, nios2, mips, sh and sparc. In the previous version of
this patch, I had turned off the missing prototype warnings for the 15
architectures that still had issues, but since there are only five left, I
think we can leave the rest to the maintainers (Cc'd here) as well.
The series is also likely to cause occasional build regressions on
linux-next as developers add new code that misses prototypes. Hopefully
this should be resolved by the time the patches make it into a release and
everyone gets the warnings right away.
This patch (of 6):
There is no global declaration for ida_dump() and no other callers, so
make it static to avoid this warning:
lib/test_ida.c:16:6: error: no previous prototype for 'ida_dump'
Link: https://lkml.kernel.org/r/20231123110506.707903-1-arnd@kernel.org
Link: https://lkml.kernel.org/r/20231123110506.707903-2-arnd@kernel.org
Fixes: 8ab8ba38d4 ("ida: Start new test_ida module")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Dinh Nguyen <dinguyen@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nicolas Schier <nicolas@fjasle.eu>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Tudor Ambarus <tudor.ambarus@linaro.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Kees Cook <keescook@chromium.org>
Cc: Palmer Dabbelt <palmer@rivosinc.com>
Cc: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Record and report more information to help us find the cause of the bug
and to help us correlate the error with other system events.
This patch adds recording and showing CPU number and timestamp at
allocation and free (controlled by CONFIG_KASAN_EXTRA_INFO). The
timestamps in the report use the same format and source as printk.
Error occurrence timestamp is already implicit in the printk log, and CPU
number is already shown by dump_stack_lvl, so there is no need to add it.
In order to record CPU number and timestamp at allocation and free,
corresponding members need to be added to the relevant data structures,
which will lead to increased memory consumption.
In Generic KASAN, members are added to struct kasan_track. Since in most
cases, alloc meta is stored in the redzone and free meta is stored in the
object or the redzone, memory consumption will not increase much.
In SW_TAGS KASAN and HW_TAGS KASAN, members are added to struct
kasan_stack_ring_entry. Memory consumption increases as the size of
struct kasan_stack_ring_entry increases (this part of the memory is
allocated by memblock), but since this is configurable, it is up to the
user to choose.
Link: https://lkml.kernel.org/r/VI1P193MB0752BD991325D10E4AB1913599BDA@VI1P193MB0752.EURP193.PROD.OUTLOOK.COM
Signed-off-by: Juntong Deng <juntong.deng@outlook.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
KMSAN is frequently used in fuzzing scenarios and thus saves a lot of
stack traces. As KMSAN does not support evicting stack traces from the
stack depot, the stack depot capacity might be reached quickly with large
stack records.
Adjust the maximum number of stack depot pools for this case.
The average size of a stack trace saved into the stack depot is ~16
frames. Thus, adjust the maximum pools number accordingly to keep the
maximum number of stack traces that can be saved into the stack depot
similar to the one that was allowed before the stack trace eviction
changes.
Link: https://lkml.kernel.org/r/301a115cf7ce8ddb42ef6de9151c2bb76ba728fc.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add stack_depot_put, a function that decrements the reference counter on a
stack record and removes it from the stack depot once the counter reaches
0.
Internally, when removing a stack record, the function unlinks it from the
hash table bucket and returns to the freelist.
With this change, the users of stack depot can call stack_depot_put when
keeping a stack trace in the stack depot is not needed anymore. This
allows avoiding polluting the stack depot with irrelevant stack traces and
thus have more space to store the relevant ones before the stack depot
reaches its capacity.
Link: https://lkml.kernel.org/r/1d1ad5692ee43d4fc2b3fd9d221331d30b36123f.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add a reference counter for how many times a stack records has been
added to stack depot.
Add a new STACK_DEPOT_FLAG_GET flag to stack_depot_save_flags that
instructs the stack depot to increment the refcount.
Do not yet decrement the refcount; this is implemented in one of the
following patches.
Do not yet enable any users to use the flag to avoid overflowing the
refcount.
This is preparatory patch for implementing the eviction of stack records
from the stack depot.
Link: https://lkml.kernel.org/r/a3fc14a2359d019d2a008d4ff8b46a665371ffee.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Change the bool can_alloc argument of __stack_depot_save to a u32
argument that accepts a set of flags.
The following patch will add another flag to stack_depot_save_flags
besides the existing STACK_DEPOT_FLAG_CAN_ALLOC.
Also rename the function to stack_depot_save_flags, as
__stack_depot_save is a cryptic name,
Link: https://lkml.kernel.org/r/645fa15239621eebbd3a10331e5864b718839512.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Switch stack_record to use list_head for links in the hash table and in
the freelist.
This will allow removing entries from the hash table buckets.
This is preparatory patch for implementing the eviction of stack records
from the stack depot.
Link: https://lkml.kernel.org/r/4787d9a584cd33433d9ee1846b17fa3d3e1987ad.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Currently, stack depot uses the following locking scheme:
1. Lock-free accesses when looking up a stack record, which allows to
have multiple users to look up records in parallel;
2. Spinlock for protecting the stack depot pools and the hash table
when adding a new record.
For implementing the eviction of stack traces from stack depot, the
lock-free approach is not going to work anymore, as we will need to be
able to also remove records from the hash table.
Convert the spinlock into a read/write lock, and drop the atomic
accesses, as they are no longer required.
Looking up stack traces is now protected by the read lock and adding new
records - by the write lock. One of the following patches will add a
new function for evicting stack records, which will be protected by the
write lock as well.
With this change, multiple users can still look up records in parallel.
This is preparatory patch for implementing the eviction of stack records
from the stack depot.
Link: https://lkml.kernel.org/r/9f81ffcc4bb422ebb6326a65a770bf1918634cbb.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Instead of using the global pool_offset variable to find a free slot when
storing a new stack record, mainlain a freelist of free slots within the
allocated stack pools.
A global next_stack variable is used as the head of the freelist, and the
next field in the stack_record struct is reused as freelist link (when the
record is not in the freelist, this field is used as a link in the hash
table).
This is preparatory patch for implementing the eviction of stack records
from the stack depot.
Link: https://lkml.kernel.org/r/b9e4c79955c2121b69301778643b203d3fb09ccc.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Instead of using the last pointer in stack_pools for storing the pointer
to a new pool (which does not yet store any stack records), use a new
new_pool variable.
This a purely code readability change: it seems more logical to store the
pointer to a pool with a special meaning in a dedicated variable.
Link: https://lkml.kernel.org/r/448bc18296c16bef95cb3167697be6583dcc8ce3.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Rename next_pool_required to new_pool_required.
This a purely code readability change: the following patch will change
stack depot to store the pointer to the new pool in a separate variable,
and "new" seems like a more logical name.
Link: https://lkml.kernel.org/r/fd7cd6c6eb250c13ec5d2009d75bb4ddd1470db9.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Split code in depot_alloc_stack and depot_init_pool into 3 functions:
1. depot_keep_next_pool that keeps preallocated memory for the next pool
if required.
2. depot_update_pools that moves on to the next pool if there's no space
left in the current pool, uses preallocated memory for the new current
pool if required, and calls depot_keep_next_pool otherwise.
3. depot_alloc_stack that calls depot_update_pools and then allocates
a stack record as before.
This makes it somewhat easier to follow the logic of depot_alloc_stack and
also serves as a preparation for implementing the eviction of stack
records from the stack depot.
Link: https://lkml.kernel.org/r/71fb144d42b701fcb46708d7f4be6801a4a8270e.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Drop smp_load_acquire from next_pool_required in depot_init_pool, as both
depot_init_pool and the all smp_store_release's to this variable are
executed under the stack depot lock.
Also simplify and clean up comments accompanying the use of atomic
accesses in the stack depot code.
Link: https://lkml.kernel.org/r/c118ef044d8db80248d9e1f14592c72e8429e9d9.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Instead of storing stack records in stack depot pools one right after
another, use fixed-sized slots.
Add a new Kconfig option STACKDEPOT_MAX_FRAMES that allows to select the
size of the slot in frames. Use 64 as the default value, which is the
maximum stack trace size both KASAN and KMSAN use right now.
Also add descriptions for other stack depot Kconfig options.
This is preparatory patch for implementing the eviction of stack records
from the stack depot.
Link: https://lkml.kernel.org/r/dce7d030a99ff61022509665187fac45b0827298.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add a helper depot_fetch_stack function that fetches the pointer to a
stack record.
With this change, all static depot_* functions now operate on stack pools
and the exported stack_depot_* functions operate on the hash table.
Link: https://lkml.kernel.org/r/170d8c202f29dc8e3d5491ee074d1e9e029a46db.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Stack depot doesn't use the valid bit in handles in any way, so drop it.
Link: https://lkml.kernel.org/r/34969bba2ca6e012c6ad071767197dee64dc5723.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The retval local variable in __stack_depot_save has the union type
handle_parts, but the function never uses anything but the union's handle
field.
Define retval simply as depot_stack_handle_t to simplify the code.
Link: https://lkml.kernel.org/r/3b0763c8057a1cf2f200ff250a5f9580ee36a28c.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Do not try fetching a stack trace from the stack depot if the
stack_depot_disabled flag is enabled.
Link: https://lkml.kernel.org/r/c3bfa3b7ab00b2e48ab75a3fbb9c67555777cb08.1700502145.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "stackdepot: allow evicting stack traces", v4.
Currently, the stack depot grows indefinitely until it reaches its
capacity. Once that happens, the stack depot stops saving new stack
traces.
This creates a problem for using the stack depot for in-field testing and
in production.
For such uses, an ideal stack trace storage should:
1. Allow saving fresh stack traces on systems with a large uptime while
limiting the amount of memory used to store the traces;
2. Have a low performance impact.
Implementing #1 in the stack depot is impossible with the current
keep-forever approach. This series targets to address that. Issue #2 is
left to be addressed in a future series.
This series changes the stack depot implementation to allow evicting
unneeded stack traces from the stack depot. The users of the stack depot
can do that via new stack_depot_save_flags(STACK_DEPOT_FLAG_GET) and
stack_depot_put APIs.
Internal changes to the stack depot code include:
1. Storing stack traces in fixed-frame-sized slots (vs precisely-sized
slots in the current implementation); the slot size is controlled via
CONFIG_STACKDEPOT_MAX_FRAMES (default: 64 frames);
2. Keeping available slots in a freelist (vs keeping an offset to the next
free slot);
3. Using a read/write lock for synchronization (vs a lock-free approach
combined with a spinlock).
This series also integrates the eviction functionality into KASAN: the
tag-based modes evict stack traces when the corresponding entry leaves the
stack ring, and Generic KASAN evicts stack traces for objects once those
leave the quarantine.
With KASAN, despite wasting some space on rounding up the size of each
stack record, the total memory consumed by stack depot gets saturated due
to the eviction of irrelevant stack traces from the stack depot.
With the tag-based KASAN modes, the average total amount of memory used
for stack traces becomes ~0.5 MB (with the current default stack ring size
of 32k entries and the default CONFIG_STACKDEPOT_MAX_FRAMES of 64). With
Generic KASAN, the stack traces take up ~1 MB per 1 GB of RAM (as the
quarantine's size depends on the amount of RAM).
However, with KMSAN, the stack depot ends up using ~4x more memory per a
stack trace than before. Thus, for KMSAN, the stack depot capacity is
increased accordingly. KMSAN uses a lot of RAM for shadow memory anyway,
so the increased stack depot memory usage will not make a significant
difference.
Other users of the stack depot do not save stack traces as often as KASAN
and KMSAN. Thus, the increased memory usage is taken as an acceptable
trade-off. In the future, these other users can take advantage of the
eviction API to limit the memory waste.
There is no measurable boot time performance impact of these changes for
KASAN on x86-64. I haven't done any tests for arm64 modes (the stack
depot without performance optimizations is not suitable for intended use
of those anyway), but I expect a similar result. Obtaining and copying
stack trace frames when saving them into stack depot is what takes the
most time.
This series does not yet provide a way to configure the maximum size of
the stack depot externally (e.g. via a command-line parameter). This
will be added in a separate series, possibly together with the performance
improvement changes.
This patch (of 22):
Currently, if stack_depot_disable=off is passed to the kernel command-line
after stack_depot_disable=on, stack depot prints a message that it is
disabled, while it is actually enabled.
Fix this by moving printing the disabled message to
stack_depot_early_init. Place it before the
__stack_depot_early_init_requested check, so that the message is printed
even if early stack depot init has not been requested.
Also drop the stack_table = NULL assignment from disable_stack_depot, as
stack_table is NULL by default.
Link: https://lkml.kernel.org/r/cover.1700502145.git.andreyknvl@google.com
Link: https://lkml.kernel.org/r/73a25c5fff29f3357cd7a9330e85e09bc8da2cbe.1700502145.git.andreyknvl@google.com
Fixes: e1fdc40334 ("lib: stackdepot: add support to disable stack depot")
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
KASan inline instrumentation can yield up to a 2x performance gain at the
cost of a larger binary.
Make inline instrumentation the default, as suggested in the bug report
below.
When an architecture does not support inline instrumentation, it should
set ARCH_DISABLE_KASAN_INLINE, as done by PowerPC, for instance.
Link: https://lkml.kernel.org/r/20231109155101.186028-1-paul.heidekrueger@tum.de
Signed-off-by: Paul Heidekrüger <paul.heidekrueger@tum.de>
Reported-by: Andrey Konovalov <andreyknvl@gmail.com>
Reviewed-by: Marco Elver <elver@google.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=203495
Acked-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
When destroying maple tree, preserve its attributes and then turn it into
an empty tree. This allows it to be reused without needing to be
reinitialized.
Link: https://lkml.kernel.org/r/20231027033845.90608-10-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Mike Christie <michael.christie@oracle.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Updated check_forking() and bench_forking() to use __mt_dup() to duplicate
maple tree.
Link: https://lkml.kernel.org/r/20231027033845.90608-9-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Mike Christie <michael.christie@oracle.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Skip other tests when BENCH is enabled so that performance can be measured
in user space.
Link: https://lkml.kernel.org/r/20231027033845.90608-8-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Mike Christie <michael.christie@oracle.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Introduce interfaces __mt_dup() and mtree_dup(), which are used to
duplicate a maple tree. They duplicate a maple tree in Depth-First Search
(DFS) pre-order traversal. It uses memcopy() to copy nodes in the source
tree and allocate new child nodes in non-leaf nodes. The new node is
exactly the same as the source node except for all the addresses stored in
it. It will be faster than traversing all elements in the source tree and
inserting them one by one into the new tree. The time complexity of these
two functions is O(n).
The difference between __mt_dup() and mtree_dup() is that mtree_dup()
handles locks internally.
Analysis of the average time complexity of this algorithm:
For simplicity, let's assume that the maximum branching factor of all
non-leaf nodes is 16 (in allocation mode, it is 10), and the tree is a
full tree.
Under the given conditions, if there is a maple tree with n elements, the
number of its leaves is n/16. From bottom to top, the number of nodes in
each level is 1/16 of the number of nodes in the level below. So the
total number of nodes in the entire tree is given by the sum of n/16 +
n/16^2 + n/16^3 + ... + 1. This is a geometric series, and it has log(n)
terms with base 16. According to the formula for the sum of a geometric
series, the sum of this series can be calculated as (n-1)/15. Each node
has only one parent node pointer, which can be considered as an edge. In
total, there are (n-1)/15-1 edges.
This algorithm consists of two operations:
1. Traversing all nodes in DFS order.
2. For each node, making a copy and performing necessary modifications
to create a new node.
For the first part, DFS traversal will visit each edge twice. Let
T(ascend) represent the cost of taking one step downwards, and T(descend)
represent the cost of taking one step upwards. And both of them are
constants (although mas_ascend() may not be, as it contains a loop, but
here we ignore it and treat it as a constant). So the time spent on the
first part can be represented as ((n-1)/15-1) * (T(ascend) + T(descend)).
For the second part, each node will be copied, and the cost of copying a
node is denoted as T(copy_node). For each non-leaf node, it is necessary
to reallocate all child nodes, and the cost of this operation is denoted
as T(dup_alloc). The behavior behind memory allocation is complex and not
specific to the maple tree operation. Here, we assume that the time
required for a single allocation is constant. Since the size of a node is
fixed, both of these symbols are also constants. We can calculate that
the time spent on the second part is ((n-1)/15) * T(copy_node) + ((n-1)/15
- n/16) * T(dup_alloc).
Adding both parts together, the total time spent by the algorithm can be
represented as:
((n-1)/15) * (T(ascend) + T(descend) + T(copy_node) + T(dup_alloc)) -
n/16 * T(dup_alloc) - (T(ascend) + T(descend))
Let C1 = T(ascend) + T(descend) + T(copy_node) + T(dup_alloc)
Let C2 = T(dup_alloc)
Let C3 = T(ascend) + T(descend)
Finally, the expression can be simplified as:
((16 * C1 - 15 * C2) / (15 * 16)) * n - (C1 / 15 + C3).
This is a linear function, so the average time complexity is O(n).
Link: https://lkml.kernel.org/r/20231027033845.90608-4-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Suggested-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Mike Christie <michael.christie@oracle.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "Introduce __mt_dup() to improve the performance of fork()", v7.
This series introduces __mt_dup() to improve the performance of fork().
During the duplication process of mmap, all VMAs are traversed and
inserted one by one into the new maple tree, causing the maple tree to be
rebalanced multiple times. Balancing the maple tree is a costly
operation. To duplicate VMAs more efficiently, mtree_dup() and __mt_dup()
are introduced for the maple tree. They can efficiently duplicate a maple
tree.
Here are some algorithmic details about {mtree,__mt}_dup(). We perform a
DFS pre-order traversal of all nodes in the source maple tree. During
this process, we fully copy the nodes from the source tree to the new
tree. This involves memory allocation, and when encountering a new node,
if it is a non-leaf node, all its child nodes are allocated at once.
This idea was originally from Liam R. Howlett's Maple Tree Work email,
and I added some of my own ideas to implement it. Some previous
discussions can be found in [1]. For a more detailed analysis of the
algorithm, please refer to the logs for patch [3/10] and patch [10/10].
There is a "spawn" in byte-unixbench[2], which can be used to test the
performance of fork(). I modified it slightly to make it work with
different number of VMAs.
Below are the test results. The first row shows the number of VMAs. The
second and third rows show the number of fork() calls per ten seconds,
corresponding to next-20231006 and the this patchset, respectively. The
test results were obtained with CPU binding to avoid scheduler load
balancing that could cause unstable results. There are still some
fluctuations in the test results, but at least they are better than the
original performance.
21 121 221 421 821 1621 3221 6421 12821 25621 51221
112100 76261 54227 34035 20195 11112 6017 3161 1606 802 393
114558 83067 65008 45824 28751 16072 8922 4747 2436 1233 599
2.19% 8.92% 19.88% 34.64% 42.37% 44.64% 48.28% 50.17% 51.68% 53.74% 52.42%
Thanks to Liam and Matthew for the review.
This patch (of 10):
Add two helpers:
1. mt_free_one(), used to free a maple node.
2. mt_attr(), used to obtain the attributes of maple tree.
Link: https://lkml.kernel.org/r/20231027033845.90608-1-zhangpeng.00@bytedance.com
Link: https://lkml.kernel.org/r/20231027033845.90608-2-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Mike Christie <michael.christie@oracle.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Currently, there are two test cases with same name
"ALU64_SMOD_X: -7 % 2 = -1", the first one is right,
the second one should be ALU64_SMOD_K because its
code is BPF_ALU64 | BPF_MOD | BPF_K.
Before:
test_bpf: #170 ALU64_SMOD_X: -7 % 2 = -1 jited:1 4 PASS
test_bpf: #171 ALU64_SMOD_X: -7 % 2 = -1 jited:1 4 PASS
After:
test_bpf: #170 ALU64_SMOD_X: -7 % 2 = -1 jited:1 4 PASS
test_bpf: #171 ALU64_SMOD_K: -7 % 2 = -1 jited:1 4 PASS
Fixes: daabb2b098 ("bpf/tests: add tests for cpuv4 instructions")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20231207040851.19730-1-yangtiezhu@loongson.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
The remainder address post-6.6 issues or aren't considered serious enough
to justify backporting.
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZXKEfwAKCRDdBJ7gKXxA
jlRpAQCiAp1nSqIz/fOKTzoQRaTDXU/m+C+6ZAXdKLDfvQBhpwEAnxxjZ8IgF+8Z
Klz/GirHX5w5o7jE2wb8iObo1nR75Qo=
=omRq
-----END PGP SIGNATURE-----
Merge tag 'mm-hotfixes-stable-2023-12-07-18-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"31 hotfixes. Ten of these address pre-6.6 issues and are marked
cc:stable. The remainder address post-6.6 issues or aren't considered
serious enough to justify backporting"
* tag 'mm-hotfixes-stable-2023-12-07-18-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (31 commits)
mm/madvise: add cond_resched() in madvise_cold_or_pageout_pte_range()
nilfs2: prevent WARNING in nilfs_sufile_set_segment_usage()
mm/hugetlb: have CONFIG_HUGETLB_PAGE select CONFIG_XARRAY_MULTI
scripts/gdb: fix lx-device-list-bus and lx-device-list-class
MAINTAINERS: drop Antti Palosaari
highmem: fix a memory copy problem in memcpy_from_folio
nilfs2: fix missing error check for sb_set_blocksize call
kernel/Kconfig.kexec: drop select of KEXEC for CRASH_DUMP
units: add missing header
drivers/base/cpu: crash data showing should depends on KEXEC_CORE
mm/damon/sysfs-schemes: add timeout for update_schemes_tried_regions
scripts/gdb/tasks: fix lx-ps command error
mm/Kconfig: make userfaultfd a menuconfig
selftests/mm: prevent duplicate runs caused by TEST_GEN_PROGS
mm/damon/core: copy nr_accesses when splitting region
lib/group_cpus.c: avoid acquiring cpu hotplug lock in group_cpus_evenly
checkstack: fix printed address
mm/memory_hotplug: fix error handling in add_memory_resource()
mm/memory_hotplug: add missing mem_hotplug_lock
.mailmap: add a new address mapping for Chester Lin
...
group_cpus_evenly() could be part of storage driver's error handler, such
as nvme driver, when may happen during CPU hotplug, in which storage queue
has to drain its pending IOs because all CPUs associated with the queue
are offline and the queue is becoming inactive. And handling IO needs
error handler to provide forward progress.
Then deadlock is caused:
1) inside CPU hotplug handler, CPU hotplug lock is held, and blk-mq's
handler is waiting for inflight IO
2) error handler is waiting for CPU hotplug lock
3) inflight IO can't be completed in blk-mq's CPU hotplug handler
because error handling can't provide forward progress.
Solve the deadlock by not holding CPU hotplug lock in group_cpus_evenly(),
in which two stage spreads are taken: 1) the 1st stage is over all present
CPUs; 2) the end stage is over all other CPUs.
Turns out the two stage spread just needs consistent 'cpu_present_mask',
and remove the CPU hotplug lock by storing it into one local cache. This
way doesn't change correctness, because all CPUs are still covered.
Link: https://lkml.kernel.org/r/20231120083559.285174-1-ming.lei@redhat.com
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Reported-by: Guangwu Zhang <guazhang@redhat.com>
Tested-by: Guangwu Zhang <guazhang@redhat.com>
Reviewed-by: Chengming Zhou <zhouchengming@bytedance.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Cc: Keith Busch <kbusch@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The original intention of acpi_parse_entries_array() is to return the
number of all matching entries on success. This number may be greater than
the value of the max_entries parameter. When this happens, the function
will output a warning message, indicating that `count - max_entries`
matching entries remain unprocessed and have been ignored.
However, commit 4ceacd02f5 ("ACPI / table: Always count matched and
successfully parsed entries") changed this logic to return the number of
entries successfully processed by the handler. In this case, when the
max_entries parameter is not zero, the number of entries successfully
processed can never be greater than the value of max_entries. In other
words, the expression `count > max_entries` will always evaluate to false.
This means that the logic in the final if statement will never be executed.
Commit 99b0efd7c8 ("ACPI / tables: do not report the number of entries
ignored by acpi_parse_entries()") mentioned this issue, but it tried to fix
it by removing part of the warning message. This is meaningless because the
pr_warn statement will never be executed in the first place.
Commit 8726d4f441 ("ACPI / tables: fix acpi_parse_entries_array() so it
traverses all subtables") introduced an errs variable, which is intended to
make acpi_parse_entries_array() always traverse all of the subtables,
calling as many of the callbacks as possible. However, it seems that the
commit does not achieve this goal. For example, when a handler returns an
error, none of the handlers will be called again in the subsequent
iterations. This result appears to be no different from before the change.
This patch corrects and cleans up the logic of acpi_parse_entries_array(),
making it return the number of all matching entries, rather than the number
of entries successfully processed by handlers. Additionally, if an error
occurs when executing a handler, the function will return -EINVAL immediately.
This patch should not affect existing users of acpi_parse_entries_array().
Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
A refcount issue can appeared in __fwnode_link_del() due to the
pr_debug() call:
WARNING: CPU: 0 PID: 901 at lib/refcount.c:25 refcount_warn_saturate+0xe5/0x110
Call Trace:
<TASK>
...
of_node_get+0x1e/0x30
of_fwnode_get+0x28/0x40
fwnode_full_name_string+0x34/0x90
fwnode_string+0xdb/0x140
...
vsnprintf+0x17b/0x630
...
__fwnode_link_del+0x25/0xa0
fwnode_links_purge+0x39/0xb0
of_node_release+0xd9/0x180
...
Indeed, an fwnode (of_node) is being destroyed and so, of_node_release()
is called because the of_node refcount reached 0.
From of_node_release() several function calls are done and lead to
a pr_debug() calls with %pfwf to print the fwnode full name.
The issue is not present if we change %pfwf to %pfwP.
To print the full name, %pfwf iterates over the current node and its
parents and obtain/drop a reference to all nodes involved.
In order to allow to print the full name (%pfwf) of a node while it is
being destroyed, do not obtain/drop a reference to this current node.
Fixes: a92eb7621b ("lib/vsprintf: Make use of fwnode API to obtain node names and separators")
Cc: stable@vger.kernel.org
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20231114152655.409331-1-herve.codina@bootlin.com
With the removal of the 'iov' argument to import_single_range(), the two
functions are now fully identical. Convert the import_single_range()
callers to import_ubuf(), and remove the former fully.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/20231204174827.1258875-3-axboe@kernel.dk
Signed-off-by: Christian Brauner <brauner@kernel.org>
Remove CONFIG_SLAB, CONFIG_DEBUG_SLAB, CONFIG_SLAB_DEPRECATED and
everything in Kconfig files and mm/Makefile that depends on those. Since
SLUB is the only remaining allocator, remove the allocator choice, make
CONFIG_SLUB a "def_bool y" for now and remove all explicit dependencies
on SLUB or SLAB as it's now always enabled. Make every option's verbose
name and description refer to "the slab allocator" without refering to
the specific implementation. Do not rename the CONFIG_ option names yet.
Everything under #ifdef CONFIG_SLAB, and mm/slab.c is now dead code, all
code under #ifdef CONFIG_SLUB is now always compiled.
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Christoph Lameter <cl@linux.com>
Acked-by: David Rientjes <rientjes@google.com>
Tested-by: David Rientjes <rientjes@google.com>
Reviewed-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Tested-by: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
- objpool: Fix objpool overrun case on memory/cache access delay especially
on the big.LITTLE SoC. The objpool uses a copy of object slot index
internal loop, but the slot index can be changed on another processor
in parallel. In that case, the difference of 'head' local copy and the
'slot->last' index will be bigger than local slot size. In that case,
we need to re-read the slot::head to update it.
- kretprobe: Fix to use appropriate rcu API for kretprobe holder. Since
kretprobe_holder::rp is RCU managed, it should use rcu_assign_pointer()
and rcu_dereference_check() correctly. Also adding __rcu tag for
finding wrong usage by sparse.
- rethook: Fix to use appropriate rcu API for rethook::handler. The same
as kretprobe, rethook::handler is RCU managed and it should use
rcu_assign_pointer() and rcu_dereference_check(). This also adds __rcu
tag for finding wrong usage by sparse.
-----BEGIN PGP SIGNATURE-----
iQFPBAABCgA5FiEEh7BulGwFlgAOi5DV2/sHvwUrPxsFAmVpfBobHG1hc2FtaS5o
aXJhbWF0c3VAZ21haWwuY29tAAoJENv7B78FKz8bNyMIAJSLICKQNuFiBJEn/rty
ACWJ9QMOnwi0DoVaepG/m9QJh6AIUUFW4//9helmSm0GIVzxQ2+f8UeKU+sYiVtH
ro9atea4W4+FMTvtEB1cU8oG5CDVT4WQdUXbjMktqYe3+WB8Zt8+fIP0mnbTFAVr
yStpliGPecmlupJVRYqrJGyDdbkUxXxVlPsP/eDrHFgbBWv8Incw0f+MLGSi6LSE
sZ1MaKCdi2tlHbtD/fiowfLoBMZwQAKY4hq/XguVsWh+BGaGUgwtif+8ESwPeu22
KEZLyWDQ1N8XBHyOBotV7vsBEwh6LKtLGVXIBsO4KxVyGw6msxWBis0dt/tkn+kk
LEg=
=B9WK
-----END PGP SIGNATURE-----
Merge tag 'probes-fixes-v6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes fixes from Masami Hiramatsu:
- objpool: Fix objpool overrun case on memory/cache access delay
especially on the big.LITTLE SoC. The objpool uses a copy of object
slot index internal loop, but the slot index can be changed on
another processor in parallel. In that case, the difference of 'head'
local copy and the 'slot->last' index will be bigger than local slot
size. In that case, we need to re-read the slot::head to update it.
- kretprobe: Fix to use appropriate rcu API for kretprobe holder. Since
kretprobe_holder::rp is RCU managed, it should use
rcu_assign_pointer() and rcu_dereference_check() correctly. Also
adding __rcu tag for finding wrong usage by sparse.
- rethook: Fix to use appropriate rcu API for rethook::handler. The
same as kretprobe, rethook::handler is RCU managed and it should use
rcu_assign_pointer() and rcu_dereference_check(). This also adds
__rcu tag for finding wrong usage by sparse.
* tag 'probes-fixes-v6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
rethook: Use __rcu pointer for rethook::handler
kprobes: consistent rcu api usage for kretprobe holder
lib: objpool: fix head overrun on RK3588 SBC
- Fix a recently introduced build issue on ARM32 platforms caused by an
inadvertent header file breakage (Dave Jiang).
- Eliminate questionable usage of acpi_driver_data() in the ACPI
backlight cooling device code that leads to NULL pointer dereferences
after recent ACPI core changes (Hans de Goede).
-----BEGIN PGP SIGNATURE-----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=ANS/
-----END PGP SIGNATURE-----
Merge tag 'acpi-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"This fixes a recently introduced build issue on ARM32 and a NULL
pointer dereference in the ACPI backlight driver due to a design issue
exposed by a recent change in the ACPI bus type code.
Specifics:
- Fix a recently introduced build issue on ARM32 platforms caused by
an inadvertent header file breakage (Dave Jiang)
- Eliminate questionable usage of acpi_driver_data() in the ACPI
backlight cooling device code that leads to NULL pointer
dereferences after recent ACPI core changes (Hans de Goede)"
* tag 'acpi-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: video: Use acpi_video_device for cooling-dev driver data
ACPI: Fix ARM32 platforms compile issue introduced by fw_table changes
Bigger/user visible fixes:
- bcache & bcachefs were broken with CFI enabled; patch for closures to
fix type punning
- mark erasure coding as extra-experimental; there are incompatible
disk space accounting changes coming for erasure coding, and I'm
still seeing checksum errors in some tests
- several fixes for durability-related issues (durability is a device
specific setting where we can tell bcachefs that data on a given
device should be counted as replicated x times )
- a fix for a rare livelock when a btree node merge then updates a
parent node that is almost full
- fix a race in the device removal path, where dropping a pointer in a
btree node to a device would be clobbered by an in flight btree write
updating the btree node key on completion
- fix one SRCU lock hold time warning in the btree gc code - ther's
still a bunch more of these to fix
- fix a rare race where we'd start copygc before initializing the "are
we rw" percpu refcount; copygc would think we were already ro and die
immediately
https://evilpiepirate.org/~testdashboard/ci?branch=bcachefs-for-upstream
-----BEGIN PGP SIGNATURE-----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=vN+y
-----END PGP SIGNATURE-----
Merge tag 'bcachefs-2023-11-29' of https://evilpiepirate.org/git/bcachefs
Pull more bcachefs bugfixes from Kent Overstreet:
- bcache & bcachefs were broken with CFI enabled; patch for closures to
fix type punning
- mark erasure coding as extra-experimental; there are incompatible
disk space accounting changes coming for erasure coding, and I'm
still seeing checksum errors in some tests
- several fixes for durability-related issues (durability is a device
specific setting where we can tell bcachefs that data on a given
device should be counted as replicated x times)
- a fix for a rare livelock when a btree node merge then updates a
parent node that is almost full
- fix a race in the device removal path, where dropping a pointer in a
btree node to a device would be clobbered by an in flight btree write
updating the btree node key on completion
- fix one SRCU lock hold time warning in the btree gc code - ther's
still a bunch more of these to fix
- fix a rare race where we'd start copygc before initializing the "are
we rw" percpu refcount; copygc would think we were already ro and die
immediately
* tag 'bcachefs-2023-11-29' of https://evilpiepirate.org/git/bcachefs: (23 commits)
bcachefs: Extra kthread_should_stop() calls for copygc
bcachefs: Convert gc_alloc_start() to for_each_btree_key2()
bcachefs: Fix race between btree writes and metadata drop
bcachefs: move journal seq assertion
bcachefs: -EROFS doesn't count as move_extent_start_fail
bcachefs: trace_move_extent_start_fail() now includes errcode
bcachefs: Fix split_race livelock
bcachefs: Fix bucket data type for stripe buckets
bcachefs: Add missing validation for jset_entry_data_usage
bcachefs: Fix zstd compress workspace size
bcachefs: bpos is misaligned on big endian
bcachefs: Fix ec + durability calculation
bcachefs: Data update path won't accidentaly grow replicas
bcachefs: deallocate_extra_replicas()
bcachefs: Proper refcounting for journal_keys
bcachefs: preserve device path as device name
bcachefs: Fix an endianness conversion
bcachefs: Start gc, copygc, rebalance threads after initing writes ref
bcachefs: Don't stop copygc thread on device resize
bcachefs: Make sure bch2_move_ratelimit() also waits for move_ops
...
Merge a fix for a recently introduced build issue on ARM32 platforms
caused by an inadvertent header file breakage (Dave Jiang).
* acpi-tables:
ACPI: Fix ARM32 platforms compile issue introduced by fw_table changes
objpool overrun stress with test_objpool on OrangePi5+ SBC triggered the
following kernel warnings:
WARNING: CPU: 6 PID: 3115 at lib/objpool.c:168 objpool_push+0xc0/0x100
This message is from objpool.c:168:
WARN_ON_ONCE(tail - head > pool->nr_objs);
The overrun test case is to validate the case that pre-allocated objects
are insufficient: 8 objects are pre-allocated for each node and consumer
thread per node tries to grab 16 objects in a row. The testing system is
OrangePI 5+, with RK3588, a big.LITTLE SOC with 4x A76 and 4x A55. When
disabling either all 4 big or 4 little cores, the overrun tests run well,
and once with big and little cores mixed together, the overrun test would
always cause an overrun loop. It's likely the memory timing differences
of big and little cores cause this trouble. Here are the debugging data
of objpool_try_get_slot after try_cmpxchg_release:
objpool_pop: cpu: 4/0 0:0 head: 278/279 tail:278 last:276/278
The local copies of 'head' and 'last' were 278 and 276, and reloading of
'slot->head' and 'slot->last' got 279 and 278. After try_cmpxchg_release
'slot->head' became 'head + 1', which is correct. But what's wrong here
is the stale value of 'last', and that stale value of 'last' finally led
the overrun of 'head'.
Memory updating of 'last' and 'head' are performed in push() and pop()
independently, which could be the culprit leading this out of order
visibility of 'last' and 'head'. So for objpool_try_get_slot(), it's
not enough only checking the condition of 'head != slot', the implicit
condition 'last - head <= nr_objs' must also be explicitly asserted to
guarantee 'last' is always behind 'head' before the object retrieving.
This patch will check and try reloading of 'head' and 'last' to ensure
'last' is behind 'head' at the time of object retrieving. Performance
testings show the average impact is about 0.1% for X86_64 and 1.12% for
ARM64. Here are the results:
OS: Debian 10 X86_64, Linux 6.6rc
HW: XEON 8336C x 2, 64 cores/128 threads, DDR4 3200MT/s
1T 2T 4T 8T 16T
native: 49543304 99277826 199017659 399070324 795185848
objpool: 29909085 59865637 119692073 239750369 478005250
objpool+: 29879313 59230743 119609856 239067773 478509029
32T 48T 64T 96T 128T
native: 1596927073 2390099988 2929397330 3183875848 3257546602
objpool: 957553042 1435814086 1680872925 2043126796 2165424198
objpool+: 956476281 1434491297 1666055740 2041556569 2157415622
OS: Debian 11 AARCH64, Linux 6.6rc
HW: Kunpeng-920 96 cores/2 sockets/4 NUMA nodes, DDR4 2933 MT/s
1T 2T 4T 8T 16T
native: 30890508 60399915 123111980 242257008 494002946
objpool: 14742531 28883047 57739948 115886644 232455421
objpool+: 14107220 29032998 57286084 113730493 232232850
24T 32T 48T 64T 96T
native: 746406039 1000174750 1493236240 1998318364 2942911180
objpool: 349164852 467284332 702296756 934459713 1387898285
objpool+: 348388180 462750976 696606096 927865887 1368402195
Link: https://lore.kernel.org/all/20231114115148.298821-1-wuqiang.matt@bytedance.com/
Fixes: b4edb8d2d4 ("lib: objpool added: ring-array based lockless MPMC")
Signed-off-by: wuqiang.matt <wuqiang.matt@bytedance.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
This KUnit fixes update for Linux 6.7-rc4 consists of three fixes to
warnings and run-time test behavior. With these fixes, test suite
counter will be reset correctly before running tests, kunit will warn
if tests are too slow, and eliminate warning when kfree() as an action.
-----BEGIN PGP SIGNATURE-----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=g2ql
-----END PGP SIGNATURE-----
Merge tag 'linux_kselftest-kunit-fixes-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull KUnit fixes from Shuah Khan:
"Three fixes to warnings and run-time test behavior. With these fixes,
test suite counter will be reset correctly before running tests, kunit
will warn if tests are too slow, and eliminate warning when kfree() as
an action"
* tag 'linux_kselftest-kunit-fixes-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: test: Avoid cast warning when adding kfree() as an action
kunit: Reset suite counter right before running tests
kunit: Warn if tests are slow
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTFp0I1jqZrAX+hPRXbK58LschIgwUCZWiCPAAKCRDbK58LschI
g4djAQC1FdqCRIFkhbiIRNHTgHjnfQShELQbd9ofJqzylLqmmgD+JI1E7D9SXagm
pIXQ26EGmq8/VcCT3VLncA8EsC76Gg4=
=Xowm
-----END PGP SIGNATURE-----
Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Daniel Borkmann says:
====================
pull-request: bpf-next 2023-11-30
We've added 30 non-merge commits during the last 7 day(s) which contain
a total of 58 files changed, 1598 insertions(+), 154 deletions(-).
The main changes are:
1) Add initial TX metadata implementation for AF_XDP with support in mlx5
and stmmac drivers. Two types of offloads are supported right now, that
is, TX timestamp and TX checksum offload, from Stanislav Fomichev with
stmmac implementation from Song Yoong Siang.
2) Change BPF verifier logic to validate global subprograms lazily instead
of unconditionally before the main program, so they can be guarded using
BPF CO-RE techniques, from Andrii Nakryiko.
3) Add BPF link_info support for uprobe multi link along with bpftool
integration for the latter, from Jiri Olsa.
4) Use pkg-config in BPF selftests to determine ld flags which is
in particular needed for linking statically, from Akihiko Odaki.
5) Fix a few BPF selftest failures to adapt to the upcoming LLVM18,
from Yonghong Song.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (30 commits)
bpf/tests: Remove duplicate JSGT tests
selftests/bpf: Add TX side to xdp_hw_metadata
selftests/bpf: Convert xdp_hw_metadata to XDP_USE_NEED_WAKEUP
selftests/bpf: Add TX side to xdp_metadata
selftests/bpf: Add csum helpers
selftests/xsk: Support tx_metadata_len
xsk: Add option to calculate TX checksum in SW
xsk: Validate xsk_tx_metadata flags
xsk: Document tx_metadata_len layout
net: stmmac: Add Tx HWTS support to XDP ZC
net/mlx5e: Implement AF_XDP TX timestamp and checksum offload
tools: ynl: Print xsk-features from the sample
xsk: Add TX timestamp and TX checksum offload support
xsk: Support tx_metadata_len
selftests/bpf: Use pkg-config for libelf
selftests/bpf: Override PKG_CONFIG for static builds
selftests/bpf: Choose pkg-config for the target
bpftool: Add support to display uprobe_multi links
selftests/bpf: Add link_info test for uprobe_multi link
selftests/bpf: Use bpf_link__destroy in fill_link_info tests
...
====================
Conflicts:
Documentation/netlink/specs/netdev.yaml:
839ff60df3 ("net: page_pool: add nlspec for basic access to page pools")
48eb03dd26 ("xsk: Add TX timestamp and TX checksum offload support")
https://lore.kernel.org/all/20231201094705.1ee3cab8@canb.auug.org.au/
While at it also regen, tree is dirty after:
48eb03dd26 ("xsk: Add TX timestamp and TX checksum offload support")
looks like code wasn't re-rendered after "render-max" was removed.
Link: https://lore.kernel.org/r/20231130145708.32573-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
It seems unnecessary that JSGT is tested twice (one before JSGE and one
after JSGE) since others are tested only once. Remove the duplicate JSGT
tests.
Fixes: 0bbaa02b48 ("bpf/tests: Add tests to check source register zero-extension")
Signed-off-by: Yujie Liu <yujie.liu@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Link: https://lore.kernel.org/bpf/20231130034018.2144963-1-yujie.liu@intel.com
- Drop HP-UX ENOSYM and EREMOTERELEASE return codes to avoid glibc
build issues
- Fix section alignments for ex_table, altinstructions, parisc unwind
table, jump_table and bug_table
- Reduce size of bug_table on 64-bit kernel by using relative
pointers
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQS86RI+GtKfB8BJu973ErUQojoPXwUCZWNy+gAKCRD3ErUQojoP
XwmuAQDw3a424GmG9c4lxQgPCdtFMUeOCOpMpPNNWdT8UhAcngD9FL5++lt1mwhK
mq+w+ftx9sATtUIbvX5exkD1dChRaQw=
=+Q66
-----END PGP SIGNATURE-----
Merge tag 'parisc-for-6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc architecture fixes from Helge Deller:
"This patchset fixes and enforces correct section alignments for the
ex_table, altinstructions, parisc_unwind, jump_table and bug_table
which are created by inline assembly.
Due to not being correctly aligned at link & load time they can
trigger unnecessarily the kernel unaligned exception handler at
runtime. While at it, I switched the bug table to use relative
addresses which reduces the size of the table by half on 64-bit.
We still had the ENOSYM and EREMOTERELEASE errno symbols as left-overs
from HP-UX, which now trigger build-issues with glibc. We can simply
remove them.
Most of the patches are tagged for stable kernel series.
Summary:
- Drop HP-UX ENOSYM and EREMOTERELEASE return codes to avoid glibc
build issues
- Fix section alignments for ex_table, altinstructions, parisc unwind
table, jump_table and bug_table
- Reduce size of bug_table on 64-bit kernel by using relative
pointers"
* tag 'parisc-for-6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Reduce size of the bug_table on 64-bit kernel by half
parisc: Drop the HP-UX ENOSYM and EREMOTERELEASE error codes
parisc: Use natural CPU alignment for bug_table
parisc: Ensure 32-bit alignment on parisc unwind section
parisc: Mark lock_aligned variables 16-byte aligned on SMP
parisc: Mark jump_table naturally aligned
parisc: Mark altinstructions read-only and 32-bit aligned
parisc: Mark ex_table entries 32-bit aligned in uaccess.h
parisc: Mark ex_table entries 32-bit aligned in assembly.h
Those return codes are only defined for the parisc architecture and
are leftovers from when we wanted to be HP-UX compatible.
They are not returned by any Linux kernel syscall but do trigger
problems with the glibc strerrorname_np() and strerror() functions as
reported in glibc issue #31080.
There is no need to keep them, so simply remove them.
Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: Bruno Haible <bruno@clisp.org>
Closes: https://sourceware.org/bugzilla/show_bug.cgi?id=31080
Cc: stable@vger.kernel.org
No error code are available to signal an invalid firmware content.
Drivers that can check the firmware content validity can not return this
specific failure to the user-space
Expand the firmware error code with an additional code:
- "firmware invalid" code which can be used when the provided firmware
is invalid
Sync lib/test_firmware.c file accordingly.
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20231122-feature_firmware_error_code-v3-1-04ec753afb71@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZWBq0gAKCRCRxhvAZXjc
ot4EAP48O5ExMtQ3/AIkNDo+/9/Iz4g7bE1HYmdyiMPO3Ou/uwEAySwBXRJrFAsS
9omvkEdqrfyguW0xgoYwcxBdATVHnAE=
=ScR3
-----END PGP SIGNATURE-----
Merge tag 'vfs-6.7-rc3.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull vfs fixes from Christian Brauner:
- Avoid calling back into LSMs from vfs_getattr_nosec() calls.
IMA used to query inode properties accessing raw inode fields without
dedicated helpers. That was finally fixed a few releases ago by
forcing IMA to use vfs_getattr_nosec() helpers.
The goal of the vfs_getattr_nosec() helper is to query for attributes
without calling into the LSM layer which would be quite problematic
because incredibly IMA is called from __fput()...
__fput()
-> ima_file_free()
What it does is to call back into the filesystem to update the file's
IMA xattr. Querying the inode without using vfs_getattr_nosec() meant
that IMA didn't handle stacking filesystems such as overlayfs
correctly. So the switch to vfs_getattr_nosec() is quite correct. But
the switch to vfs_getattr_nosec() revealed another bug when used on
stacking filesystems:
__fput()
-> ima_file_free()
-> vfs_getattr_nosec()
-> i_op->getattr::ovl_getattr()
-> vfs_getattr()
-> i_op->getattr::$WHATEVER_UNDERLYING_FS_getattr()
-> security_inode_getattr() # calls back into LSMs
Now, if that __fput() happens from task_work_run() of an exiting task
current->fs and various other pointer could already be NULL. So
anything in the LSM layer relying on that not being NULL would be
quite surprised.
Fix that by passing the information that this is a security request
through to the stacking filesystem by adding a new internal
ATT_GETATTR_NOSEC flag. Now the callchain becomes:
__fput()
-> ima_file_free()
-> vfs_getattr_nosec()
-> i_op->getattr::ovl_getattr()
-> if (AT_GETATTR_NOSEC)
vfs_getattr_nosec()
else
vfs_getattr()
-> i_op->getattr::$WHATEVER_UNDERLYING_FS_getattr()
- Fix a bug introduced with the iov_iter rework from last cycle.
This broke /proc/kcore by copying too much and without the correct
offset.
- Add a missing NULL check when allocating the root inode in
autofs_fill_super().
- Fix stable writes for multi-device filesystems (xfs, btrfs etc) and
the block device pseudo filesystem.
Stable writes used to be a superblock flag only, making it a per
filesystem property. Add an additional AS_STABLE_WRITES mapping flag
to allow for fine-grained control.
- Ensure that offset_iterate_dir() returns 0 after reaching the end of
a directory so it adheres to getdents() convention.
* tag 'vfs-6.7-rc3.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
libfs: getdents() should return 0 after reaching EOD
xfs: respect the stable writes flag on the RT device
xfs: clean up FS_XFLAG_REALTIME handling in xfs_ioctl_setattr_xflags
block: update the stable_writes flag in bdev_add
filemap: add a per-mapping stable writes flag
autofs: add: new_inode check in autofs_fill_super()
iov_iter: fix copy_page_to_iter_nofault()
fs: Pass AT_GETATTR_NOSEC flag to getattr interface function
Control flow integrity is now checking that type signatures match on
indirect function calls. That breaks closures, which embed a work_struct
in a closure in such a way that a closure_fn may also be used as a
workqueue fn by the underlying closure code.
So we have to change closure fns to take a work_struct as their
argument - but that results in a loss of clarity, as closure fns have
different semantics from normal workqueue functions (they run owning a
ref on the closure, which must be released with continue_at() or
closure_return()).
Thus, this patc introduces CLOSURE_CALLBACK() and closure_type() macros
as suggested by Kees, to smooth things over a bit.
Suggested-by: Kees Cook <keescook@chromium.org>
Cc: Coly Li <colyli@suse.de>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Linus reported that:
After commit a103f46633 the kernel stopped compiling for
several ARM32 platforms that I am building with a bare metal
compiler. Bare metal compilers (arm-none-eabi-) don't
define __linux__.
This is because the header <acpi/platform/acenv.h> is now
in the include path for <linux/irq.h>:
CC arch/arm/kernel/irq.o
CC kernel/sysctl.o
CC crypto/api.o
In file included from ../include/acpi/acpi.h:22,
from ../include/linux/fw_table.h:29,
from ../include/linux/acpi.h:18,
from ../include/linux/irqchip.h:14,
from ../arch/arm/kernel/irq.c:25:
../include/acpi/platform/acenv.h:218:2: error: #error Unknown target environment
218 | #error Unknown target environment
| ^~~~~
The issue is caused by the introducing of splitting out the ACPI code to
support the new generic fw_table code.
Rafael suggested [1] moving the fw_table.h include in linux/acpi.h to below
the linux/mutex.h. Remove the two includes in fw_table.h. Replace
linux/fw_table.h include in fw_table.c with linux/acpi.h.
Link: https://lore.kernel.org/linux-acpi/CAJZ5v0idWdJq3JSqQWLG5q+b+b=zkEdWR55rGYEoxh7R6N8kFQ@mail.gmail.com/
Fixes: a103f46633 ("acpi: Move common tables helper functions to common lib")
Closes: https://lore.kernel.org/linux-acpi/20231114-arm-build-bug-v1-1-458745fe32a4@linaro.org/
Reported-by: Linus Walleij <linus.walleij@linaro.org>
Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
After release of the hashbucket lock the tracking object can be modified or
freed by a concurrent thread. Using it in such a case is error prone, even
for printing the object state:
1. T1 tries to deactivate destroyed object, debugobjects detects it,
hash bucket lock is released.
2. T2 preempts T1 and frees the tracking object.
3. The freed tracking object is allocated and initialized for a
different to be tracked kernel object.
4. T1 resumes and reports error for wrong kernel object.
Create a local copy of the tracking object before releasing the hash bucket
lock and use the local copy for reporting and fixups to prevent this.
Signed-off-by: Andrzej Hajda <andrzej.hajda@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20231025-debugobjects_fix-v3-1-2bc3bf7084c2@intel.com
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTFp0I1jqZrAX+hPRXbK58LschIgwUCZV0kjgAKCRDbK58LschI
gy0EAP9XwncW2OhO72DpITluFzvWPgB0N97OANKBXjzKJrRAlQD/aUe9nlvBQuad
WsbMKLeC4wvI2X/4PEIR4ukbuZ3ypAA=
=LMVg
-----END PGP SIGNATURE-----
Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Daniel Borkmann says:
====================
pull-request: bpf-next 2023-11-21
We've added 85 non-merge commits during the last 12 day(s) which contain
a total of 63 files changed, 4464 insertions(+), 1484 deletions(-).
The main changes are:
1) Huge batch of verifier changes to improve BPF register bounds logic
and range support along with a large test suite, and verifier log
improvements, all from Andrii Nakryiko.
2) Add a new kfunc which acquires the associated cgroup of a task within
a specific cgroup v1 hierarchy where the latter is identified by its id,
from Yafang Shao.
3) Extend verifier to allow bpf_refcount_acquire() of a map value field
obtained via direct load which is a use-case needed in sched_ext,
from Dave Marchevsky.
4) Fix bpf_get_task_stack() helper to add the correct crosstask check
for the get_perf_callchain(), from Jordan Rome.
5) Fix BPF task_iter internals where lockless usage of next_thread()
was wrong. The rework also simplifies the code, from Oleg Nesterov.
6) Fix uninitialized tail padding via LIBBPF_OPTS_RESET, and another
fix for certain BPF UAPI structs to fix verifier failures seen
in bpf_dynptr usage, from Yonghong Song.
7) Add BPF selftest fixes for map_percpu_stats flakes due to per-CPU BPF
memory allocator not being able to allocate per-CPU pointer successfully,
from Hou Tao.
8) Add prep work around dynptr and string handling for kfuncs which
is later going to be used by file verification via BPF LSM and fsverity,
from Song Liu.
9) Improve BPF selftests to update multiple prog_tests to use ASSERT_*
macros, from Yuran Pereira.
10) Optimize LPM trie lookup to check prefixlen before walking the trie,
from Florian Lehner.
11) Consolidate virtio/9p configs from BPF selftests in config.vm file
given they are needed consistently across archs, from Manu Bretelle.
12) Small BPF verifier refactor to remove register_is_const(),
from Shung-Hsi Yu.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (85 commits)
selftests/bpf: Replaces the usage of CHECK calls for ASSERTs in vmlinux
selftests/bpf: Replaces the usage of CHECK calls for ASSERTs in bpf_obj_id
selftests/bpf: Replaces the usage of CHECK calls for ASSERTs in bind_perm
selftests/bpf: Replaces the usage of CHECK calls for ASSERTs in bpf_tcp_ca
selftests/bpf: reduce verboseness of reg_bounds selftest logs
bpf: bpf_iter_task_next: use next_task(kit->task) rather than next_task(kit->pos)
bpf: bpf_iter_task_next: use __next_thread() rather than next_thread()
bpf: task_group_seq_get_next: use __next_thread() rather than next_thread()
bpf: emit frameno for PTR_TO_STACK regs if it differs from current one
bpf: smarter verifier log number printing logic
bpf: omit default off=0 and imm=0 in register state log
bpf: emit map name in register state if applicable and available
bpf: print spilled register state in stack slot
bpf: extract register state printing
bpf: move verifier state printing code to kernel/bpf/log.c
bpf: move verbose_linfo() into kernel/bpf/log.c
bpf: rename BPF_F_TEST_SANITY_STRICT to BPF_F_TEST_REG_INVARIANTS
bpf: Remove test for MOVSX32 with offset=32
selftests/bpf: add iter test requiring range x range logic
veristat: add ability to set BPF_F_TEST_SANITY_STRICT flag with -r flag
...
====================
Link: https://lore.kernel.org/r/20231122000500.28126-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The recent conversion to inline functions made two mistakes:
1. It tries to copy the full amount requested (bytes), not just what's
available in the kmap'd page (n).
2. It's not applying the offset in the first page.
Note that copy_page_to_iter_nofault() is only used by /proc/kcore. This
was detected by drgn's test suite.
Fixes: f1982740f5 ("iov_iter: Convert iterate*() to inline funcs")
Signed-off-by: Omar Sandoval <osandov@fb.com>
Link: https://lore.kernel.org/r/c1616e06b5248013cbbb1881bb4fef85a7a69ccb.1700257019.git.osandov@fb.com
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Add kernel documentation for the aesgcm_mac.
This function generates the authentication tag using the AES-GCM algorithm.
Signed-off-by: Sagar Vashnav <sagarvashnav72427@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
MOVSX32 only supports sign extending 8-bit and 16-bit operands into 32
bit operands. The "ALU_MOVSX | BPF_W" test tries to sign extend a 32 bit
operand into a 32 bit operand which is equivalent to a normal BPF_MOV.
Remove this test as it tries to run an invalid instruction.
Fixes: daabb2b098 ("bpf/tests: add tests for cpuv4 instructions")
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Reported-by: kernel test robot <oliver.sang@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202310111838.46ff5b6a-oliver.sang@intel.com
Acked-by: Stanislav Fomichev <sdf@google.com>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20231110175150.87803-1-puranjay12@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Only a single line change to fix a benign UBSAN warning that has been
baking in linux-next for a month. I just missed the merge window, but I
think it is worthwhile to include this fix in the v6.7 kernel. If you
would like me to wait for v6.8 please let me know.
Signed-off-by: Nick Terrell <terrelln@fb.com>
-----BEGIN PGP SIGNATURE-----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=w0Q0
-----END PGP SIGNATURE-----
Merge tag 'zstd-linus-v6.7-rc2' of https://github.com/terrelln/linux
Pull Zstd fix from Nick Terrell:
"Only a single line change to fix a benign UBSAN warning"
* tag 'zstd-linus-v6.7-rc2' of https://github.com/terrelln/linux:
zstd: Fix array-index-out-of-bounds UBSAN warning
Zstd used an array of length 1 to mean a flexible array for C89
compatibility. Switch to a C99 flexible array to fix the UBSAN warning.
Tested locally by booting the kernel and writing to and reading from a
BtrFS filesystem with zstd compression enabled. I was unable to reproduce
the issue before the fix, however it is a trivial change.
Link: https://lkml.kernel.org/r/20231012213428.1390905-1-nickrterrell@gmail.com
Reported-by: syzbot+1f2eb3e8cd123ffce499@syzkaller.appspotmail.com
Reported-by: Eric Biggers <ebiggers@kernel.org>
Reported-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Nick Terrell <terrelln@fb.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
In kunit_log_test() pass the kfree_wrapper() function to kunit_add_action()
instead of directly passing kfree().
This prevents a cast warning:
lib/kunit/kunit-test.c:565:25: warning: cast from 'void (*)(const void *)'
to 'kunit_action_t *' (aka 'void (*)(void *)') converts to incompatible
function type [-Wcast-function-type-strict]
564 full_log = string_stream_get_string(test->log);
> 565 kunit_add_action(test, (kunit_action_t *)kfree, full_log);
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202311070041.kWVYx7YP-lkp@intel.com/
Fixes: 05e2006ce4 ("kunit: Use string_stream for test log")
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Today we reset the suite counter as part of the suite cleanup,
called from the module exit callback, but it might not work that
well as one can try to collect results without unloading a previous
test (either unintentionally or due to dependencies).
For easy reproduction try to load the kunit-test.ko and then
collect and parse results from the kunit-example-test.ko load.
Parser will complain about mismatch of expected test number:
[ ] KTAP version 1
[ ] 1..1
[ ] # example: initializing suite
[ ] KTAP version 1
[ ] # Subtest: example
..
[ ] # example: pass:5 fail:0 skip:4 total:9
[ ] # Totals: pass:6 fail:0 skip:6 total:12
[ ] ok 7 example
[ ] [ERROR] Test: example: Expected test number 1 but found 7
[ ] ===================== [PASSED] example =====================
[ ] ============================================================
[ ] Testing complete. Ran 12 tests: passed: 6, skipped: 6, errors: 1
Since we are now printing suite test plan on every module load,
right before running suite tests, we should make sure that suite
counter will also start from 1. Easiest solution seems to be move
counter reset to the __kunit_test_suites_init() function.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: David Gow <davidgow@google.com>
Cc: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Kunit recently gained support to setup attributes, the first one being
the speed of a given test, then allowing to filter out slow tests.
A slow test is defined in the documentation as taking more than one
second. There's an another speed attribute called "super slow" but whose
definition is less clear.
Add support to the test runner to check the test execution time, and
report tests that should be marked as slow but aren't.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Here's the second big bcachefs pull request. This brings your tree up to
date with my master branch, which is what existing bcachefs users are
currently running.
All but the last few patches have been in linux-next, those being small
fixes. Test results from my dashboard:
https://evilpiepirate.org/~testdashboard/ci?commit=c7046ed0cf9bb33599aa7e72e7b67bba4be42d64
New features:
- rebalance_work btree (and metadata version 1.3): the rebalance thread
no longer has to scan to find extents that need processing - big
scalability improvement.
- sb_errors superblock section: this adds counters for each fsck error
type, since filesystem creation, along with the date of the most
recent error. It'll get us better bug reports (since users do not
typically report errors that fsck was able to fix), and I might add
telemetry for this in the future.
Fixes include:
- multiple snapshot deletion fixes
- members_v2 fixups
- deleted_inodes btree fixes
- copygc thread no longer spins when a device is full but has no
fragmented buckets (i.e. rebalance needs to move data around instead)
- a fix for a memory reclaim issue with the btree key cache: we're now
careful not to hold the srcu read lock that blocks key cache reclaim
for too long
- an early allocator locking fix, from Brian
- endianness fixes, from Brian
- CONFIG_BCACHEFS_DEBUG_TRANSACTIONS no longer defaults to y, a big
performance improvement on multithreaded workloads
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEKnAFLkS8Qha+jvQrE6szbY3KbnYFAmVH9xYACgkQE6szbY3K
bnahLRAAiNRZL73SQ+MW79o4yPqGwt0Eyy/mvoiGpZf1B8uXp0oZ55j2w3l887Uf
LeM03mInAYCPdyp/d4vxqIr96j9BODmRRl8sEkkGdJDzokLG+22F0ovOe45KWTxL
kBoNdng/O/oeOe/1K7taP3KzBvMx2nOF6oA+xfgyCjECMArAIXek0iocyEUR4Ywd
vGKhLNn1k2c+94wacnDYwjjdcLBxoqxsFXlpu6V0BcaY+DX4J3aBaGmj75KEoCI0
VbBOzxrOO4QzJrzW2+hxZZWgGyvReCkBJvqfORfuPxiSbFobTim10MdfZOAMQA1U
Xr1FTEpK1wMX0/pPVgZRqaOsttC+yc/SsfPNgSxybgHPbDlMLaakDHjvYssbKOYG
urDWSMG5yCsktSLj95SXsvUFKZaZFD72SKBNdgdt/nZjwTHuNQ7IkdrMwIrCQ/PT
Ifn50UrR/Ahd8RAd5tyNCPw6U9VfwnxACSNl2KA7ONKpvHb+gSt1JsJTDyz1+gN9
nFVrw1SHKQ6EIV6XhVon/5DEuRTzqoYGWoN08FHEUq9fBlvnVpmbJErCQMplOjz9
OQnAfpJH4YqkpXyjFAjP1V0An+RUn8QvDgXNqC9TyvCYuOliVFuil4y7/c+7oIQU
NEoz+jVLenqsGOGAbduI4/Q567COojRgwEvbebSIxSImXuhCNj4=
=Lo4N
-----END PGP SIGNATURE-----
Merge tag 'bcachefs-2023-11-5' of https://evilpiepirate.org/git/bcachefs
Pull more bcachefs updates from Kent Overstreet:
"Here's the second big bcachefs pull request. This brings your tree up
to date with my master branch, which is what existing bcachefs users
are currently running.
New features:
- rebalance_work btree (and metadata version 1.3): the rebalance
thread no longer has to scan to find extents that need processing -
big scalability improvement.
- sb_errors superblock section: this adds counters for each fsck
error type, since filesystem creation, along with the date of the
most recent error. It'll get us better bug reports (since users do
not typically report errors that fsck was able to fix), and I might
add telemetry for this in the future.
Fixes include:
- multiple snapshot deletion fixes
- members_v2 fixups
- deleted_inodes btree fixes
- copygc thread no longer spins when a device is full but has no
fragmented buckets (i.e. rebalance needs to move data around
instead)
- a fix for a memory reclaim issue with the btree key cache: we're
now careful not to hold the srcu read lock that blocks key cache
reclaim for too long
- an early allocator locking fix, from Brian
- endianness fixes, from Brian
- CONFIG_BCACHEFS_DEBUG_TRANSACTIONS no longer defaults to y, a big
performance improvement on multithreaded workloads"
* tag 'bcachefs-2023-11-5' of https://evilpiepirate.org/git/bcachefs: (70 commits)
bcachefs: Improve stripe checksum error message
bcachefs: Simplify, fix bch2_backpointer_get_key()
bcachefs: kill thing_it_points_to arg to backpointer_not_found()
bcachefs: bch2_ec_read_extent() now takes btree_trans
bcachefs: bch2_stripe_to_text() now prints ptr gens
bcachefs: Don't iterate over journal entries just for btree roots
bcachefs: Break up bch2_journal_write()
bcachefs: Replace ERANGE with private error codes
bcachefs: bkey_copy() is no longer a macro
bcachefs: x-macro-ify inode flags enum
bcachefs: Convert bch2_fs_open() to darray
bcachefs: Move __bch2_members_v2_get_mut to sb-members.h
bcachefs: bch2_prt_datetime()
bcachefs: CONFIG_BCACHEFS_DEBUG_TRANSACTIONS no longer defaults to y
bcachefs: Add a comment for BTREE_INSERT_NOJOURNAL usage
bcachefs: rebalance_work btree is not a snapshots btree
bcachefs: Add missing printk newlines
bcachefs: Fix recovery when forced to use JSET_NO_FLUSH journal entry
bcachefs: .get_parent() should return an error pointer
bcachefs: Fix bch2_delete_dead_inodes()
...
- Add support for RCH (Restricted CXL Host) Error recovery
- Fix several region assembly bugs
- Fix mem-device lifetime issues relative to the sanitize command and
RCH topology.
- Refactor ACPI table parsing for CDAT parsing re-use in preparation for
CXL QOS support.
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQSbo+XnGs+rwLz9XGXfioYZHlFsZwUCZUaowQAKCRDfioYZHlFs
Z75rAP44azzLPwJtva7Ur60KpNsGuoZKhvWWdeI1/zo9k4pHbwEA/Vaf/GGo0U5k
bMkoTmwPTd7YY79B5HNUQSZsqF9wlAc=
=TEQ0
-----END PGP SIGNATURE-----
Merge tag 'cxl-for-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
Pull CXL (Compute Express Link) updates from Dan Williams:
"The main new functionality this time is work to allow Linux to
natively handle CXL link protocol errors signalled via PCIe AER for
current generation CXL platforms. This required some enlightenment of
the PCIe AER core to workaround the fact that current generation RCH
(Restricted CXL Host) platforms physically hide topology details and
registers via a mechanism called RCRB (Root Complex Register Block).
The next major highlight is reworks to address bugs in parsing region
configurations for next generation VH (Virtual Host) topologies. The
old broken algorithm is replaced with a simpler one that significantly
increases the number of region configurations supported by Linux. This
is again relevant for error handling so that forward and reverse
address translation of memory errors can be carried out by Linux for
memory regions instantiated by platform firmware.
As for other cross-tree work, the ACPI table parsing code has been
refactored for reuse parsing the "CDAT" structure which is an
ACPI-like data structure that is reported by CXL devices. That work is
in preparation for v6.8 support for CXL QoS. Think of this as dynamic
generation of NUMA node topology information generated by Linux rather
than platform firmware.
Lastly, a number of internal object lifetime issues have been resolved
along with misc. fixes and feature updates (decoders_committed sysfs
ABI).
Summary:
- Add support for RCH (Restricted CXL Host) Error recovery
- Fix several region assembly bugs
- Fix mem-device lifetime issues relative to the sanitize command and
RCH topology.
- Refactor ACPI table parsing for CDAT parsing re-use in preparation
for CXL QOS support"
* tag 'cxl-for-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (50 commits)
lib/fw_table: Remove acpi_parse_entries_array() export
cxl/pci: Change CXL AER support check to use native AER
cxl/hdm: Remove broken error path
cxl/hdm: Fix && vs || bug
acpi: Move common tables helper functions to common lib
cxl: Add support for reading CXL switch CDAT table
cxl: Add checksum verification to CDAT from CXL
cxl: Export QTG ids from CFMWS to sysfs as qos_class attribute
cxl: Add decoders_committed sysfs attribute to cxl_port
cxl: Add cxl_decoders_committed() helper
cxl/core/regs: Rework cxl_map_pmu_regs() to use map->dev for devm
cxl/core/regs: Rename phys_addr in cxl_map_component_regs()
PCI/AER: Unmask RCEC internal errors to enable RCH downstream port error handling
PCI/AER: Forward RCH downstream port-detected errors to the CXL.mem dev handler
cxl/pci: Disable root port interrupts in RCH mode
cxl/pci: Add RCH downstream port error logging
cxl/pci: Map RCH downstream AER registers for logging protocol errors
cxl/pci: Update CXL error logging to use RAS register address
PCI/AER: Refactor cper_print_aer() for use by CXL driver module
cxl/pci: Add RCH downstream port AER register discovery
...
- Add support for KVM running as a nested hypervisor under development versions
of PowerVM, using the new PAPR nested virtualisation API.
- Add support for the BPF prog pack allocator.
- A rework of the non-server MMU handling to support execute-only on all platforms.
- Some optimisations & cleanups for the powerpc qspinlock code.
- Various other small features and fixes.
Thanks to: Aboorva Devarajan, Aditya Gupta, Amit Machhiwal, Benjamin Gray,
Christophe Leroy, Dr. David Alan Gilbert, Gaurav Batra, Gautam Menghani, Geert
Uytterhoeven, Haren Myneni, Hari Bathini, Joel Stanley, Jordan Niethe, Julia
Lawall, Kautuk Consul, Kuan-Wei Chiu, Michael Neuling, Minjie Du, Muhammad
Muzammil, Naveen N Rao, Nicholas Piggin, Nick Child, Nysal Jan K.A, Peter
Lafreniere, Rob Herring, Sachin Sant, Sebastian Andrzej Siewior, Shrikanth
Hegde, Srikar Dronamraju, Stanislav Kinsburskii, Vaibhav Jain, Wang Yufen, Yang
Yingliang, Yuan Tan.
-----BEGIN PGP SIGNATURE-----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=ddT4
-----END PGP SIGNATURE-----
Merge tag 'powerpc-6.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
- Add support for KVM running as a nested hypervisor under development
versions of PowerVM, using the new PAPR nested virtualisation API
- Add support for the BPF prog pack allocator
- A rework of the non-server MMU handling to support execute-only on
all platforms
- Some optimisations & cleanups for the powerpc qspinlock code
- Various other small features and fixes
Thanks to Aboorva Devarajan, Aditya Gupta, Amit Machhiwal, Benjamin
Gray, Christophe Leroy, Dr. David Alan Gilbert, Gaurav Batra, Gautam
Menghani, Geert Uytterhoeven, Haren Myneni, Hari Bathini, Joel Stanley,
Jordan Niethe, Julia Lawall, Kautuk Consul, Kuan-Wei Chiu, Michael
Neuling, Minjie Du, Muhammad Muzammil, Naveen N Rao, Nicholas Piggin,
Nick Child, Nysal Jan K.A, Peter Lafreniere, Rob Herring, Sachin Sant,
Sebastian Andrzej Siewior, Shrikanth Hegde, Srikar Dronamraju, Stanislav
Kinsburskii, Vaibhav Jain, Wang Yufen, Yang Yingliang, and Yuan Tan.
* tag 'powerpc-6.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (100 commits)
powerpc/vmcore: Add MMU information to vmcoreinfo
Revert "powerpc: add `cur_cpu_spec` symbol to vmcoreinfo"
powerpc/bpf: use bpf_jit_binary_pack_[alloc|finalize|free]
powerpc/bpf: rename powerpc64_jit_data to powerpc_jit_data
powerpc/bpf: implement bpf_arch_text_invalidate for bpf_prog_pack
powerpc/bpf: implement bpf_arch_text_copy
powerpc/code-patching: introduce patch_instructions()
powerpc/32s: Implement local_flush_tlb_page_psize()
powerpc/pseries: use kfree_sensitive() in plpks_gen_password()
powerpc/code-patching: Perform hwsync in __patch_instruction() in case of failure
powerpc/fsl_msi: Use device_get_match_data()
powerpc: Remove cpm_dp...() macros
powerpc/qspinlock: Rename yield_propagate_owner tunable
powerpc/qspinlock: Propagate sleepy if previous waiter is preempted
powerpc/qspinlock: don't propagate the not-sleepy state
powerpc/qspinlock: propagate owner preemptedness rather than CPU number
powerpc/qspinlock: stop queued waiters trying to set lock sleepy
powerpc/perf: Fix disabling BHRB and instruction sampling
powerpc/trace: Add support for HAVE_FUNCTION_ARG_ACCESS_API
powerpc/tools: Pass -mabi=elfv2 to gcc-check-mprofile-kernel.sh
...
- Remove eventfs_file descriptor
This is the biggest change, and the second part of making eventfs
create its files dynamically.
In 6.6 the first part was added, and that maintained a one to one
mapping between eventfs meta descriptors and the directories and
file inodes and dentries that were dynamically created. The
directories were represented by a eventfs_inode and the files
were represented by a eventfs_file.
In v6.7 the eventfs_file is removed. As all events have the same
directory make up (sched_switch has an "enable", "id", "format",
etc files), the handing of what files are underneath each leaf
eventfs directory is moved back to the tracing subsystem via a
callback. When a event is added to the eventfs, it registers
an array of evenfs_entry's. These hold the names of the files and
the callbacks to call when the file is referenced. The callback gets
the name so that the same callback may be used by multiple files.
The callback then supplies the filesystem_operations structure needed
to create this file.
This has brought the memory footprint of creating multiple eventfs
instances down by 2 megs each!
- User events now has persistent events that are not associated
to a single processes. These are privileged events that hang around
even if no process is attached to them.
- Clean up of seq_buf.
There's talk about using seq_buf more to replace strscpy() and friends.
But this also requires some minor modifications of seq_buf to be
able to do this.
- Expand instance ring buffers individually
Currently if boot up creates an instance, and a trace event is
enabled on that instance, the ring buffer for that instance and the
top level ring buffer are expanded (1.4 MB per CPU). This wastes
memory as this happens when nothing is using the top level instance.
- Other minor clean ups and fixes.
-----BEGIN PGP SIGNATURE-----
iIoEABYIADIWIQRRSw7ePDh/lE+zeZMp5XQQmuv6qgUCZUMrBBQccm9zdGVkdEBn
b29kbWlzLm9yZwAKCRAp5XQQmuv6quzVAQCed/kPM7X9j2QZamJVDruMf2CmVxpu
/TOvKvSKV584GgEAxLntf5VKx1Q98bc68y3Zkg+OCi8jSgORos1ROmURhws=
=iIgb
-----END PGP SIGNATURE-----
Merge tag 'trace-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull tracing updates from Steven Rostedt:
- Remove eventfs_file descriptor
This is the biggest change, and the second part of making eventfs
create its files dynamically.
In 6.6 the first part was added, and that maintained a one to one
mapping between eventfs meta descriptors and the directories and file
inodes and dentries that were dynamically created. The directories
were represented by a eventfs_inode and the files were represented by
a eventfs_file.
In v6.7 the eventfs_file is removed. As all events have the same
directory make up (sched_switch has an "enable", "id", "format", etc
files), the handing of what files are underneath each leaf eventfs
directory is moved back to the tracing subsystem via a callback.
When an event is added to the eventfs, it registers an array of
evenfs_entry's. These hold the names of the files and the callbacks
to call when the file is referenced. The callback gets the name so
that the same callback may be used by multiple files. The callback
then supplies the filesystem_operations structure needed to create
this file.
This has brought the memory footprint of creating multiple eventfs
instances down by 2 megs each!
- User events now has persistent events that are not associated to a
single processes. These are privileged events that hang around even
if no process is attached to them
- Clean up of seq_buf
There's talk about using seq_buf more to replace strscpy() and
friends. But this also requires some minor modifications of seq_buf
to be able to do this
- Expand instance ring buffers individually
Currently if boot up creates an instance, and a trace event is
enabled on that instance, the ring buffer for that instance and the
top level ring buffer are expanded (1.4 MB per CPU). This wastes
memory as this happens when nothing is using the top level instance
- Other minor clean ups and fixes
* tag 'trace-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (34 commits)
seq_buf: Export seq_buf_puts()
seq_buf: Export seq_buf_putc()
eventfs: Use simple_recursive_removal() to clean up dentries
eventfs: Remove special processing of dput() of events directory
eventfs: Delete eventfs_inode when the last dentry is freed
eventfs: Hold eventfs_mutex when calling callback functions
eventfs: Save ownership and mode
eventfs: Test for ei->is_freed when accessing ei->dentry
eventfs: Have a free_ei() that just frees the eventfs_inode
eventfs: Remove "is_freed" union with rcu head
eventfs: Fix kerneldoc of eventfs_remove_rec()
tracing: Have the user copy of synthetic event address use correct context
eventfs: Remove extra dget() in eventfs_create_events_dir()
tracing: Have trace_event_file have ref counters
seq_buf: Introduce DECLARE_SEQ_BUF and seq_buf_str()
eventfs: Fix typo in eventfs_inode union comment
eventfs: Fix WARN_ON() in create_file_dentry()
powerpc: Remove initialisation of readpos
tracing/histograms: Simplify last_cmd_set()
seq_buf: fix a misleading comment
...
-----BEGIN PGP SIGNATURE-----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=Cmex
-----END PGP SIGNATURE-----
Merge tag 'printk-for-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek:
- Another preparation step for introducing printk kthreads. The main
piece is a per-console lock with several features:
- Support three priorities: normal, emergency, and panic. They will
be defined by a context where the lock is taken. A context with a
higher priority is allowed to take over the lock from a context
with a lower one.
The plan is to use the emergency context for Oops and WARN()
messages, and also by watchdogs.
The panic() context will be used on panic CPU.
- The owner might enter/exit regions where it is not safe to take
over the lock. It allows the take over the lock a safe way in the
middle of a message.
For example, serial drivers emit characters one by one. And the
serial port is in a safe state in between.
Only the final console_flush_in_panic() will be allowed to take
over the lock even in the unsafe state (last chance, pray, and
hope).
- A higher priority context might busy wait with a timeout. The
current owner is informed about the waiter and releases the lock
on exit from the unsafe state.
- The new lock is safe even in atomic contexts, including NMI.
Another change is a safe manipulation of per-console sequence number
counter under the new lock.
- simple_strntoull() micro-optimization
- Reduce pr_flush() pooling time.
- Calm down false warning about possible buffer invalid access to
console buffers when CONFIG_PRINTK is disabled.
[ .. and Thomas Gleixner wants to point out that while several of the
commits are attributed to him, he only authored the early versions of
said commits, and that John Ogness and Petr Mladek have been the ones
who sorted out the details and really should be those who get the
credit - Linus ]
* tag 'printk-for-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
vsprintf: uninline simple_strntoull(), reorder arguments
printk: printk: Remove unnecessary statements＇len = 0;＇
printk: Reduce pr_flush() pooling time
printk: fix illegal pbufs access for !CONFIG_PRINTK
printk: nbcon: Allow drivers to mark unsafe regions and check state
printk: nbcon: Add emit function and callback function for atomic printing
printk: nbcon: Add sequence handling
printk: nbcon: Add ownership state functions
printk: nbcon: Add buffer management
printk: Make static printk buffers available to nbcon
printk: nbcon: Add acquire/release logic
printk: Add non-BKL (nbcon) console basic infrastructure
Hi Linus,
Please pull patches for v6.7.
This request includes "bitmap: cleanup bitmap_*_region() implementation"
series, and scattered cleanup patches.
Thanks,
Yury
-----BEGIN PGP SIGNATURE-----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=L4AW
-----END PGP SIGNATURE-----
Merge tag 'bitmap-for-6.7' of https://github.com/norov/linux
Pull bitmap updates from Yury Norov:
"This includes the 'bitmap: cleanup bitmap_*_region() implementation'
series, and scattered cleanup patches"
* tag 'bitmap-for-6.7' of https://github.com/norov/linux:
buildid: reduce header file dependencies for module
bitmap: move bitmap_*_region() functions to bitmap.h
bitmap: drop _reg_op() function
bitmap: replace _reg_op(REG_OP_ISFREE) with find_next_bit()
bitmap: replace _reg_op(REG_OP_RELEASE) with bitmap_clear()
bitmap: replace _reg_op(REG_OP_ALLOC) with bitmap_set()
bitmap: fix opencoded bitmap_allocate_region()
bitmap: add test for bitmap_*_region() functions
bitmap: align __reg_op() wrappers with modern coding style
lib/bitmap: split-out string-related operations to a separate files
bitmap: Remove dead code, i.e. bitmap_copy_le()
bitmap: Fix a typo ("identify map")
cpumask: kernel-doc cleanups and additions
there's little I can say which isn't in the individual changelogs.
The lengthier patch series are
- "kdump: use generic functions to simplify crashkernel reservation in
arch", from Baoquan He. This is mainly cleanups and consolidation of
the "crashkernel=" kernel parameter handling.
- After much discussion, David Laight's "minmax: Relax type checks in
min() and max()" is here. Hopefully reduces some typecasting and the
use of min_t() and max_t().
- A group of patches from Oleg Nesterov which clean up and slightly fix
our handling of reads from /proc/PID/task/... and which remove
task_struct.therad_group.
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZUQP9wAKCRDdBJ7gKXxA
jmOAAQDh8sxagQYocoVsSm28ICqXFeaY9Co1jzBIDdNesAvYVwD/c2DHRqJHEiS4
63BNcG3+hM9nwGJHb5lyh5m79nBMRg0=
=On4u
-----END PGP SIGNATURE-----
Merge tag 'mm-nonmm-stable-2023-11-02-14-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
"As usual, lots of singleton and doubleton patches all over the tree
and there's little I can say which isn't in the individual changelogs.
The lengthier patch series are
- 'kdump: use generic functions to simplify crashkernel reservation
in arch', from Baoquan He. This is mainly cleanups and
consolidation of the 'crashkernel=' kernel parameter handling
- After much discussion, David Laight's 'minmax: Relax type checks in
min() and max()' is here. Hopefully reduces some typecasting and
the use of min_t() and max_t()
- A group of patches from Oleg Nesterov which clean up and slightly
fix our handling of reads from /proc/PID/task/... and which remove
task_struct.thread_group"
* tag 'mm-nonmm-stable-2023-11-02-14-08' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (64 commits)
scripts/gdb/vmalloc: disable on no-MMU
scripts/gdb: fix usage of MOD_TEXT not defined when CONFIG_MODULES=n
.mailmap: add address mapping for Tomeu Vizoso
mailmap: update email address for Claudiu Beznea
tools/testing/selftests/mm/run_vmtests.sh: lower the ptrace permissions
.mailmap: map Benjamin Poirier's address
scripts/gdb: add lx_current support for riscv
ocfs2: fix a spelling typo in comment
proc: test ProtectionKey in proc-empty-vm test
proc: fix proc-empty-vm test with vsyscall
fs/proc/base.c: remove unneeded semicolon
do_io_accounting: use sig->stats_lock
do_io_accounting: use __for_each_thread()
ocfs2: replace BUG_ON() at ocfs2_num_free_extents() with ocfs2_error()
ocfs2: fix a typo in a comment
scripts/show_delta: add __main__ judgement before main code
treewide: mark stuff as __ro_after_init
fs: ocfs2: check status values
proc: test /proc/${pid}/statm
compiler.h: move __is_constexpr() to compiler.h
...
included in this merge do the following:
- Kemeng Shi has contributed some compation maintenance work in the
series "Fixes and cleanups to compaction".
- Joel Fernandes has a patchset ("Optimize mremap during mutual
alignment within PMD") which fixes an obscure issue with mremap()'s
pagetable handling during a subsequent exec(), based upon an
implementation which Linus suggested.
- More DAMON/DAMOS maintenance and feature work from SeongJae Park i the
following patch series:
mm/damon: misc fixups for documents, comments and its tracepoint
mm/damon: add a tracepoint for damos apply target regions
mm/damon: provide pseudo-moving sum based access rate
mm/damon: implement DAMOS apply intervals
mm/damon/core-test: Fix memory leaks in core-test
mm/damon/sysfs-schemes: Do DAMOS tried regions update for only one apply interval
- In the series "Do not try to access unaccepted memory" Adrian Hunter
provides some fixups for the recently-added "unaccepted memory' feature.
To increase the feature's checking coverage. "Plug a few gaps where
RAM is exposed without checking if it is unaccepted memory".
- In the series "cleanups for lockless slab shrink" Qi Zheng has done
some maintenance work which is preparation for the lockless slab
shrinking code.
- Qi Zheng has redone the earlier (and reverted) attempt to make slab
shrinking lockless in the series "use refcount+RCU method to implement
lockless slab shrink".
- David Hildenbrand contributes some maintenance work for the rmap code
in the series "Anon rmap cleanups".
- Kefeng Wang does more folio conversions and some maintenance work in
the migration code. Series "mm: migrate: more folio conversion and
unification".
- Matthew Wilcox has fixed an issue in the buffer_head code which was
causing long stalls under some heavy memory/IO loads. Some cleanups
were added on the way. Series "Add and use bdev_getblk()".
- In the series "Use nth_page() in place of direct struct page
manipulation" Zi Yan has fixed a potential issue with the direct
manipulation of hugetlb page frames.
- In the series "mm: hugetlb: Skip initialization of gigantic tail
struct pages if freed by HVO" has improved our handling of gigantic
pages in the hugetlb vmmemmep optimizaton code. This provides
significant boot time improvements when significant amounts of gigantic
pages are in use.
- Matthew Wilcox has sent the series "Small hugetlb cleanups" - code
rationalization and folio conversions in the hugetlb code.
- Yin Fengwei has improved mlock()'s handling of large folios in the
series "support large folio for mlock"
- In the series "Expose swapcache stat for memcg v1" Liu Shixin has
added statistics for memcg v1 users which are available (and useful)
under memcg v2.
- Florent Revest has enhanced the MDWE (Memory-Deny-Write-Executable)
prctl so that userspace may direct the kernel to not automatically
propagate the denial to child processes. The series is named "MDWE
without inheritance".
- Kefeng Wang has provided the series "mm: convert numa balancing
functions to use a folio" which does what it says.
- In the series "mm/ksm: add fork-exec support for prctl" Stefan Roesch
makes is possible for a process to propagate KSM treatment across
exec().
- Huang Ying has enhanced memory tiering's calculation of memory
distances. This is used to permit the dax/kmem driver to use "high
bandwidth memory" in addition to Optane Data Center Persistent Memory
Modules (DCPMM). The series is named "memory tiering: calculate
abstract distance based on ACPI HMAT"
- In the series "Smart scanning mode for KSM" Stefan Roesch has
optimized KSM by teaching it to retain and use some historical
information from previous scans.
- Yosry Ahmed has fixed some inconsistencies in memcg statistics in the
series "mm: memcg: fix tracking of pending stats updates values".
- In the series "Implement IOCTL to get and optionally clear info about
PTEs" Peter Xu has added an ioctl to /proc/<pid>/pagemap which permits
us to atomically read-then-clear page softdirty state. This is mainly
used by CRIU.
- Hugh Dickins contributed the series "shmem,tmpfs: general maintenance"
- a bunch of relatively minor maintenance tweaks to this code.
- Matthew Wilcox has increased the use of the VMA lock over file-backed
page faults in the series "Handle more faults under the VMA lock". Some
rationalizations of the fault path became possible as a result.
- In the series "mm/rmap: convert page_move_anon_rmap() to
folio_move_anon_rmap()" David Hildenbrand has implemented some cleanups
and folio conversions.
- In the series "various improvements to the GUP interface" Lorenzo
Stoakes has simplified and improved the GUP interface with an eye to
providing groundwork for future improvements.
- Andrey Konovalov has sent along the series "kasan: assorted fixes and
improvements" which does those things.
- Some page allocator maintenance work from Kemeng Shi in the series
"Two minor cleanups to break_down_buddy_pages".
- In thes series "New selftest for mm" Breno Leitao has developed
another MM self test which tickles a race we had between madvise() and
page faults.
- In the series "Add folio_end_read" Matthew Wilcox provides cleanups
and an optimization to the core pagecache code.
- Nhat Pham has added memcg accounting for hugetlb memory in the series
"hugetlb memcg accounting".
- Cleanups and rationalizations to the pagemap code from Lorenzo
Stoakes, in the series "Abstract vma_merge() and split_vma()".
- Audra Mitchell has fixed issues in the procfs page_owner code's new
timestamping feature which was causing some misbehaviours. In the
series "Fix page_owner's use of free timestamps".
- Lorenzo Stoakes has fixed the handling of new mappings of sealed files
in the series "permit write-sealed memfd read-only shared mappings".
- Mike Kravetz has optimized the hugetlb vmemmap optimization in the
series "Batch hugetlb vmemmap modification operations".
- Some buffer_head folio conversions and cleanups from Matthew Wilcox in
the series "Finish the create_empty_buffers() transition".
- As a page allocator performance optimization Huang Ying has added
automatic tuning to the allocator's per-cpu-pages feature, in the series
"mm: PCP high auto-tuning".
- Roman Gushchin has contributed the patchset "mm: improve performance
of accounted kernel memory allocations" which improves their performance
by ~30% as measured by a micro-benchmark.
- folio conversions from Kefeng Wang in the series "mm: convert page
cpupid functions to folios".
- Some kmemleak fixups in Liu Shixin's series "Some bugfix about
kmemleak".
- Qi Zheng has improved our handling of memoryless nodes by keeping them
off the allocation fallback list. This is done in the series "handle
memoryless nodes more appropriately".
- khugepaged conversions from Vishal Moola in the series "Some
khugepaged folio conversions".
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZULEMwAKCRDdBJ7gKXxA
jhQHAQCYpD3g849x69DmHnHWHm/EHQLvQmRMDeYZI+nx/sCJOwEAw4AKg0Oemv9y
FgeUPAD1oasg6CP+INZvCj34waNxwAc=
=E+Y4
-----END PGP SIGNATURE-----
Merge tag 'mm-stable-2023-11-01-14-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
"Many singleton patches against the MM code. The patch series which are
included in this merge do the following:
- Kemeng Shi has contributed some compation maintenance work in the
series 'Fixes and cleanups to compaction'
- Joel Fernandes has a patchset ('Optimize mremap during mutual
alignment within PMD') which fixes an obscure issue with mremap()'s
pagetable handling during a subsequent exec(), based upon an
implementation which Linus suggested
- More DAMON/DAMOS maintenance and feature work from SeongJae Park i
the following patch series:
mm/damon: misc fixups for documents, comments and its tracepoint
mm/damon: add a tracepoint for damos apply target regions
mm/damon: provide pseudo-moving sum based access rate
mm/damon: implement DAMOS apply intervals
mm/damon/core-test: Fix memory leaks in core-test
mm/damon/sysfs-schemes: Do DAMOS tried regions update for only one apply interval
- In the series 'Do not try to access unaccepted memory' Adrian
Hunter provides some fixups for the recently-added 'unaccepted
memory' feature. To increase the feature's checking coverage. 'Plug
a few gaps where RAM is exposed without checking if it is
unaccepted memory'
- In the series 'cleanups for lockless slab shrink' Qi Zheng has done
some maintenance work which is preparation for the lockless slab
shrinking code
- Qi Zheng has redone the earlier (and reverted) attempt to make slab
shrinking lockless in the series 'use refcount+RCU method to
implement lockless slab shrink'
- David Hildenbrand contributes some maintenance work for the rmap
code in the series 'Anon rmap cleanups'
- Kefeng Wang does more folio conversions and some maintenance work
in the migration code. Series 'mm: migrate: more folio conversion
and unification'
- Matthew Wilcox has fixed an issue in the buffer_head code which was
causing long stalls under some heavy memory/IO loads. Some cleanups
were added on the way. Series 'Add and use bdev_getblk()'
- In the series 'Use nth_page() in place of direct struct page
manipulation' Zi Yan has fixed a potential issue with the direct
manipulation of hugetlb page frames
- In the series 'mm: hugetlb: Skip initialization of gigantic tail
struct pages if freed by HVO' has improved our handling of gigantic
pages in the hugetlb vmmemmep optimizaton code. This provides
significant boot time improvements when significant amounts of
gigantic pages are in use
- Matthew Wilcox has sent the series 'Small hugetlb cleanups' - code
rationalization and folio conversions in the hugetlb code
- Yin Fengwei has improved mlock()'s handling of large folios in the
series 'support large folio for mlock'
- In the series 'Expose swapcache stat for memcg v1' Liu Shixin has
added statistics for memcg v1 users which are available (and
useful) under memcg v2
- Florent Revest has enhanced the MDWE (Memory-Deny-Write-Executable)
prctl so that userspace may direct the kernel to not automatically
propagate the denial to child processes. The series is named 'MDWE
without inheritance'
- Kefeng Wang has provided the series 'mm: convert numa balancing
functions to use a folio' which does what it says
- In the series 'mm/ksm: add fork-exec support for prctl' Stefan
Roesch makes is possible for a process to propagate KSM treatment
across exec()
- Huang Ying has enhanced memory tiering's calculation of memory
distances. This is used to permit the dax/kmem driver to use 'high
bandwidth memory' in addition to Optane Data Center Persistent
Memory Modules (DCPMM). The series is named 'memory tiering:
calculate abstract distance based on ACPI HMAT'
- In the series 'Smart scanning mode for KSM' Stefan Roesch has
optimized KSM by teaching it to retain and use some historical
information from previous scans
- Yosry Ahmed has fixed some inconsistencies in memcg statistics in
the series 'mm: memcg: fix tracking of pending stats updates
values'
- In the series 'Implement IOCTL to get and optionally clear info
about PTEs' Peter Xu has added an ioctl to /proc/<pid>/pagemap
which permits us to atomically read-then-clear page softdirty
state. This is mainly used by CRIU
- Hugh Dickins contributed the series 'shmem,tmpfs: general
maintenance', a bunch of relatively minor maintenance tweaks to
this code
- Matthew Wilcox has increased the use of the VMA lock over
file-backed page faults in the series 'Handle more faults under the
VMA lock'. Some rationalizations of the fault path became possible
as a result
- In the series 'mm/rmap: convert page_move_anon_rmap() to
folio_move_anon_rmap()' David Hildenbrand has implemented some
cleanups and folio conversions
- In the series 'various improvements to the GUP interface' Lorenzo
Stoakes has simplified and improved the GUP interface with an eye
to providing groundwork for future improvements
- Andrey Konovalov has sent along the series 'kasan: assorted fixes
and improvements' which does those things
- Some page allocator maintenance work from Kemeng Shi in the series
'Two minor cleanups to break_down_buddy_pages'
- In thes series 'New selftest for mm' Breno Leitao has developed
another MM self test which tickles a race we had between madvise()
and page faults
- In the series 'Add folio_end_read' Matthew Wilcox provides cleanups
and an optimization to the core pagecache code
- Nhat Pham has added memcg accounting for hugetlb memory in the
series 'hugetlb memcg accounting'
- Cleanups and rationalizations to the pagemap code from Lorenzo
Stoakes, in the series 'Abstract vma_merge() and split_vma()'
- Audra Mitchell has fixed issues in the procfs page_owner code's new
timestamping feature which was causing some misbehaviours. In the
series 'Fix page_owner's use of free timestamps'
- Lorenzo Stoakes has fixed the handling of new mappings of sealed
files in the series 'permit write-sealed memfd read-only shared
mappings'
- Mike Kravetz has optimized the hugetlb vmemmap optimization in the
series 'Batch hugetlb vmemmap modification operations'
- Some buffer_head folio conversions and cleanups from Matthew Wilcox
in the series 'Finish the create_empty_buffers() transition'
- As a page allocator performance optimization Huang Ying has added
automatic tuning to the allocator's per-cpu-pages feature, in the
series 'mm: PCP high auto-tuning'
- Roman Gushchin has contributed the patchset 'mm: improve
performance of accounted kernel memory allocations' which improves
their performance by ~30% as measured by a micro-benchmark
- folio conversions from Kefeng Wang in the series 'mm: convert page
cpupid functions to folios'
- Some kmemleak fixups in Liu Shixin's series 'Some bugfix about
kmemleak'
- Qi Zheng has improved our handling of memoryless nodes by keeping
them off the allocation fallback list. This is done in the series
'handle memoryless nodes more appropriately'
- khugepaged conversions from Vishal Moola in the series 'Some
khugepaged folio conversions'"
[ bcachefs conflicts with the dynamically allocated shrinkers have been
resolved as per Stephen Rothwell in
https://lore.kernel.org/all/20230913093553.4290421e@canb.auug.org.au/
with help from Qi Zheng.
The clone3 test filtering conflict was half-arsed by yours truly ]
* tag 'mm-stable-2023-11-01-14-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (406 commits)
mm/damon/sysfs: update monitoring target regions for online input commit
mm/damon/sysfs: remove requested targets when online-commit inputs
selftests: add a sanity check for zswap
Documentation: maple_tree: fix word spelling error
mm/vmalloc: fix the unchecked dereference warning in vread_iter()
zswap: export compression failure stats
Documentation: ubsan: drop "the" from article title
mempolicy: migration attempt to match interleave nodes
mempolicy: mmap_lock is not needed while migrating folios
mempolicy: alloc_pages_mpol() for NUMA policy without vma
mm: add page_rmappable_folio() wrapper
mempolicy: remove confusing MPOL_MF_LAZY dead code
mempolicy: mpol_shared_policy_init() without pseudo-vma
mempolicy trivia: use pgoff_t in shared mempolicy tree
mempolicy trivia: slightly more consistent naming
mempolicy trivia: delete those ancient pr_debug()s
mempolicy: fix migrate_pages(2) syscall return nr_failed
kernfs: drop shared NUMA mempolicy hooks
hugetlbfs: drop shared NUMA mempolicy pretence
mm/damon/sysfs-test: add a unit test for damon_sysfs_set_targets()
...
Stephen reports that the ACPI helper library rework,
CONFIG_FIRMWARE_TABLE, introduces a new compiler warning:
WARNING: modpost: vmlinux: acpi_parse_entries_array: EXPORT_SYMBOL used
for init symbol. Remove __init or EXPORT_SYMBOL.
Delete this export as it turns out it is unneeded, and future work wraps
this in another exported helper. Note that in general
EXPORT_SYMBOL_ACPI_LIB() is needed for exporting symbols that are marked
__init_or_acpilib, but in this case no export is required.
Fixes: a103f46633 ("acpi: Move common tables helper functions to common lib")
Cc: Dave Jiang <dave.jiang@intel.com>
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: http://lore.kernel.org/r/20231030160523.670a7569@canb.auug.org.au
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/169896282222.70775.940454758280866379.stgit@dwillia2-xfh.jf.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This kunit update for Linux 6.7-rc1 consists of:
-- string-stream testing enhancements
-- several fixes memory leaks
-- fix to reset status during parameter handling
-----BEGIN PGP SIGNATURE-----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=Nn2t
-----END PGP SIGNATURE-----
Merge tag 'linux_kselftest-kunit-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kunit updates from Shuah Khan:
- string-stream testing enhancements
- several fixes memory leaks
- fix to reset status during parameter handling
* tag 'linux_kselftest-kunit-6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: test: Fix the possible memory leak in executor_test
kunit: Fix possible memory leak in kunit_filter_suites()
kunit: Fix the wrong kfree of copy for kunit_filter_suites()
kunit: Fix missed memory release in kunit_free_suite_set()
kunit: Reset test status on each param iteration
kunit: string-stream: Test performance of string_stream
kunit: Use string_stream for test log
kunit: string-stream: Add tests for freeing resource-managed string_stream
kunit: string-stream: Decouple string_stream from kunit
kunit: string-stream: Add kunit_alloc_string_stream()
kunit: Don't use a managed alloc in is_literal()
kunit: string-stream-test: Add cases for string_stream newline appending
kunit: string-stream: Add option to make all lines end with newline
kunit: string-stream: Improve testing of string_stream
kunit: string-stream: Don't create a fragment for empty strings
- cleanups:
. kprobes: Fixes typo in kprobes samples.
. tracing/eprobes: Remove 'break' after return.
- kretprobe/fprobe performance improvements:
. lib: Introduce new `objpool`, which is a high performance lockless
object queue. This uses per-cpu ring array to allocate/release
objects from the pre-allocated object pool. Since the index of ring
array is a 32bit sequential counter, we can retry to push/pop the
object pointer from the ring without lock (as seq-lock does).
. lib: Add an objpool test module to test the functionality and
evaluate the performance under some circumstances.
. kprobes/fprobe: Improve kretprobe and rethook scalability
performance with objpool.
This improves both legacy kretprobe and fprobe exit handler (which
is based on rethook) to be scalable on SMP systems. Even with
8-threads parallel test, it shows a great scalability improvement.
. Remove unneeded freelist.h which is replaced by objpool.
. objpool: Add maintainers entry for the objpool.
. objpool: Fix to remove unused include header lines.
-----BEGIN PGP SIGNATURE-----
iQFPBAABCgA5FiEEh7BulGwFlgAOi5DV2/sHvwUrPxsFAmVA54obHG1hc2FtaS5o
aXJhbWF0c3VAZ21haWwuY29tAAoJENv7B78FKz8busoH/3mG/rJwVVJw70zTLlfs
ko4U1wn16aImYQYYLXkZLlYsKr6Y2dzNkb5C4CEI2r47EZjTamHatGZ6MSwvAtPb
u9oloHEbRbE6yM+EjrE1JAKT9FwC+21/yZCN2zACZKJRwCwQRzxGIXUwGTWtDNdE
NySLBDyMoR6zZJsFy8YueFBAJxcZdWIPK6mQH2Y5awVQA4tV7tQEe92KFqUYWTd5
exbfBbcVG8MBWmrPqRI46Hxh0NWOnPCqFwGqX8Q7hE/yrQnTPzJ+2ZsbYFkGRk6A
pM5wRCdwO5+OlcHEcEHBMQSGCmFgk6m1UMG8RvbCKyF3cwHbxzlelbjzHosKQvSh
EKQ=
=/vZK
-----END PGP SIGNATURE-----
Merge tag 'probes-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
Pull probes updates from Masami Hiramatsu:
"Cleanups:
- kprobes: Fixes typo in kprobes samples
- tracing/eprobes: Remove 'break' after return
kretprobe/fprobe performance improvements:
- lib: Introduce new `objpool`, which is a high performance lockless
object queue. This uses per-cpu ring array to allocate/release
objects from the pre-allocated object pool.
Since the index of ring array is a 32bit sequential counter, we can
retry to push/pop the object pointer from the ring without lock (as
seq-lock does)
- lib: Add an objpool test module to test the functionality and
evaluate the performance under some circumstances
- kprobes/fprobe: Improve kretprobe and rethook scalability
performance with objpool.
This improves both legacy kretprobe and fprobe exit handler (which
is based on rethook) to be scalable on SMP systems. Even with
8-threads parallel test, it shows a great scalability improvement
- Remove unneeded freelist.h which is replaced by objpool
- objpool: Add maintainers entry for the objpool
- objpool: Fix to remove unused include header lines"
* tag 'probes-v6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
kprobes: unused header files removed
MAINTAINERS: objpool added
kprobes: freelist.h removed
kprobes: kretprobe scalability improvement
lib: objpool test module added
lib: objpool added: ring-array based lockless MPMC
tracing/eprobe: drop unneeded breaks
samples: kprobes: Fixes a typo
The ia64 architecture gets its well-earned retirement as planned,
now that there is one last (mostly) working release that will
be maintained as an LTS kernel.
The architecture specific system call tables are updated for
the added map_shadow_stack() syscall and to remove references
to the long-gone sys_lookup_dcookie() syscall.
-----BEGIN PGP SIGNATURE-----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=H1vH
-----END PGP SIGNATURE-----
Merge tag 'asm-generic-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull ia64 removal and asm-generic updates from Arnd Bergmann:
- The ia64 architecture gets its well-earned retirement as planned,
now that there is one last (mostly) working release that will be
maintained as an LTS kernel.
- The architecture specific system call tables are updated for the
added map_shadow_stack() syscall and to remove references to the
long-gone sys_lookup_dcookie() syscall.
* tag 'asm-generic-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
hexagon: Remove unusable symbols from the ptrace.h uapi
asm-generic: Fix spelling of architecture
arch: Reserve map_shadow_stack() syscall number for all architectures
syscalls: Cleanup references to sys_lookup_dcookie()
Documentation: Drop or replace remaining mentions of IA64
lib/raid6: Drop IA64 support
Documentation: Drop IA64 from feature descriptions
kernel: Drop IA64 support from sig_fault handlers
arch: Remove Itanium (IA-64) architecture
The highlights for the driver support this time are
- Qualcomm platforms gain support for the Qualcomm Secure Execution
Environment firmware interface to access EFI variables on certain
devices, and new features for multiple platform and firmware drivers.
- Arm FF-A firmware support gains support for v1.1 specification features,
in particular notification and memory transaction descriptor changes.
- SCMI firmware support now support v3.2 features for clock and DVFS
configuration and a new transport for Qualcomm platforms.
- Minor cleanups and bugfixes are added to pretty much all the active
platforms: qualcomm, broadcom, dove, ti-k3, rockchip, sifive, amlogic,
atmel, tegra, aspeed, vexpress, mediatek, samsung and more.
In particular, this contains portions of the treewide conversion to
use __counted_by annotations and the device_get_match_data helper.
-----BEGIN PGP SIGNATURE-----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=QIut
-----END PGP SIGNATURE-----
Merge tag 'soc-drivers-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC driver updates from Arnd Bergmann:
"The highlights for the driver support this time are
- Qualcomm platforms gain support for the Qualcomm Secure Execution
Environment firmware interface to access EFI variables on certain
devices, and new features for multiple platform and firmware
drivers.
- Arm FF-A firmware support gains support for v1.1 specification
features, in particular notification and memory transaction
descriptor changes.
- SCMI firmware support now support v3.2 features for clock and DVFS
configuration and a new transport for Qualcomm platforms.
- Minor cleanups and bugfixes are added to pretty much all the active
platforms: qualcomm, broadcom, dove, ti-k3, rockchip, sifive,
amlogic, atmel, tegra, aspeed, vexpress, mediatek, samsung and
more.
In particular, this contains portions of the treewide conversion to
use __counted_by annotations and the device_get_match_data helper"
* tag 'soc-drivers-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (156 commits)
soc: qcom: pmic_glink_altmode: Print return value on error
firmware: qcom: scm: remove unneeded 'extern' specifiers
firmware: qcom: scm: add a missing forward declaration for struct device
firmware: qcom: move Qualcomm code into its own directory
soc: samsung: exynos-chipid: Convert to platform remove callback returning void
soc: qcom: apr: Add __counted_by for struct apr_rx_buf and use struct_size()
soc: qcom: pmic_glink: fix connector type to be DisplayPort
soc: ti: k3-socinfo: Avoid overriding return value
soc: ti: k3-socinfo: Fix typo in bitfield documentation
soc: ti: knav_qmss_queue: Use device_get_match_data()
firmware: ti_sci: Use device_get_match_data()
firmware: qcom: qseecom: add missing include guards
soc/pxa: ssp: Convert to platform remove callback returning void
soc/mediatek: mtk-mmsys: Convert to platform remove callback returning void
soc/mediatek: mtk-devapc: Convert to platform remove callback returning void
soc/loongson: loongson2_guts: Convert to platform remove callback returning void
soc/litex: litex_soc_ctrl: Convert to platform remove callback returning void
soc/ixp4xx: ixp4xx-qmgr: Convert to platform remove callback returning void
soc/ixp4xx: ixp4xx-npe: Convert to platform remove callback returning void
soc/hisilicon: kunpeng_hccs: Convert to platform remove callback returning void
...
* uninline simple_strntoull(),
gcc overinlines and this function is not performance critical
* reorder arguments, so that appending INT_MAX as 4th argument
generates very efficient tail call
Space savings:
add/remove: 1/0 grow/shrink: 0/3 up/down: 27/-179 (-152)
Function old new delta
simple_strntoll - 27 +27
simple_strtoull 15 10 -5
simple_strtoll 41 7 -34
vsscanf 1930 1790 -140
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/all/82a2af6e-9b6c-4a09-89d7-ca90cc1cdad1@p183/
Core & protocols
----------------
- Support usec resolution of TCP timestamps, enabled selectively by
a route attribute.
- Defer regular TCP ACK while processing socket backlog, try to send
a cumulative ACK at the end. Increase single TCP flow performance
on a 200Gbit NIC by 20% (100Gbit -> 120Gbit).
- The Fair Queuing (FQ) packet scheduler:
- add built-in 3 band prio / WRR scheduling
- support bypass if the qdisc is mostly idle (5% speed up for TCP RR)
- improve inactive flow reporting
- optimize the layout of structures for better cache locality
- Support TCP Authentication Option (RFC 5925, TCP-AO), a more modern
replacement for the old MD5 option.
- Add more retransmission timeout (RTO) related statistics to TCP_INFO.
- Support sending fragmented skbs over vsock sockets.
- Make sure we send SIGPIPE for vsock sockets if socket was shutdown().
- Add sysctl for ignoring lower limit on lifetime in Router
Advertisement PIO, based on an in-progress IETF draft.
- Add sysctl to control activation of TCP ping-pong mode.
- Add sysctl to make connection timeout in MPTCP configurable.
- Support rcvlowat and notsent_lowat on MPTCP sockets, to help apps
limit the number of wakeups.
- Support netlink GET for MDB (multicast forwarding), allowing user
space to request a single MDB entry instead of dumping the entire
table.
- Support selective FDB flushing in the VXLAN tunnel driver.
- Allow limiting learned FDB entries in bridges, prevent OOM attacks.
- Allow controlling via configfs netconsole targets which were created
via the kernel cmdline at boot, rather than via configfs at runtime.
- Support multiple PTP timestamp event queue readers with different
filters.
- MCTP over I3C.
BPF
---
- Add new veth-like netdevice where BPF program defines the logic
of the xmit routine. It can operate in L3 and L2 mode.
- Support exceptions - allow asserting conditions which should
never be true but are hard for the verifier to infer.
With some extra flexibility around handling of the exit / failure.
https://lwn.net/Articles/938435/
- Add support for local per-cpu kptr, allow allocating and storing
per-cpu objects in maps. Access to those objects operates on
the value for the current CPU. This allows to deprecate local
one-off implementations of per-CPU storage like
BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE maps.
- Extend cgroup BPF sockaddr hooks for UNIX sockets. The use case is
for systemd to re-implement the LogNamespace feature which allows
running multiple instances of systemd-journald to process the logs
of different services.
- Enable open-coded task_vma iteration, after maple tree conversion
made it hard to directly walk VMAs in tracing programs.
- Add open-coded task, css_task and css iterator support.
One of the use cases is customizable OOM victim selection via BPF.
- Allow source address selection with bpf_*_fib_lookup().
- Add ability to pin BPF timer to the current CPU.
- Prevent creation of infinite loops by combining tail calls and
fentry/fexit programs.
- Add missed stats for kprobes to retrieve the number of missed kprobe
executions and subsequent executions of BPF programs.
- Inherit system settings for CPU security mitigations.
- Add BPF v4 CPU instruction support for arm32 and s390x.
Changes to common code
----------------------
- overflow: add DEFINE_FLEX() for on-stack definition of structs
with flexible array members.
- Process doc update with more guidance for reviewers.
Driver API
----------
- Simplify locking in WiFi (cfg80211 and mac80211 layers), use wiphy
mutex in most places and remove a lot of smaller locks.
- Create a common DPLL configuration API. Allow configuring
and querying state of PLL circuits used for clock syntonization,
in network time distribution.
- Unify fragmented and full page allocation APIs in page pool code.
Let drivers be ignorant of PAGE_SIZE.
- Rework PHY state machine to avoid races with calls to phy_stop().
- Notify DSA drivers of MAC address changes on user ports, improve
correctness of offloads which depend on matching port MAC addresses.
- Allow antenna control on injected WiFi frames.
- Reduce the number of variants of napi_schedule().
- Simplify error handling when composing devlink health messages.
Misc
----
- A lot of KCSAN data race "fixes", from Eric.
- A lot of __counted_by() annotations, from Kees.
- A lot of strncpy -> strscpy and printf format fixes.
- Replace master/slave terminology with conduit/user in DSA drivers.
- Handful of KUnit tests for netdev and WiFi core.
Removed
-------
- AppleTalk COPS.
- AppleTalk ipddp.
- TI AR7 CPMAC Ethernet driver.
Drivers
-------
- Ethernet high-speed NICs:
- Intel (100G, ice, idpf):
- add a driver for the Intel E2000 IPUs
- make CRC/FCS stripping configurable
- cross-timestamping for E823 devices
- basic support for E830 devices
- use aux-bus for managing client drivers
- i40e: report firmware versions via devlink
- nVidia/Mellanox:
- support 4-port NICs
- increase max number of channels to 256
- optimize / parallelize SF creation flow
- Broadcom (bnxt):
- enhance NIC temperature reporting
- support PAM4 speeds and lane configuration
- Marvell OcteonTX2:
- PTP pulse-per-second output support
- enable hardware timestamping for VFs
- Solarflare/AMD:
- conntrack NAT offload and offload for tunnels
- Wangxun (ngbe/txgbe):
- expose HW statistics
- Pensando/AMD:
- support PCI level reset
- narrow down the condition under which skbs are linearized
- Netronome/Corigine (nfp):
- support CHACHA20-POLY1305 crypto in IPsec offload
- Ethernet NICs embedded, slower, virtual:
- Synopsys (stmmac):
- add Loongson-1 SoC support
- enable use of HW queues with no offload capabilities
- enable PPS input support on all 5 channels
- increase TX coalesce timer to 5ms
- RealTek USB (r8152): improve efficiency of Rx by using GRO frags
- xen: support SW packet timestamping
- add drivers for implementations based on TI's PRUSS (AM64x EVM)
- nVidia/Mellanox Ethernet datacenter switches:
- avoid poor HW resource use on Spectrum-4 by better block selection
for IPv6 multicast forwarding and ordering of blocks in ACL region
- Ethernet embedded switches:
- Microchip:
- support configuring the drive strength for EMI compliance
- ksz9477: partial ACL support
- ksz9477: HSR offload
- ksz9477: Wake on LAN
- Realtek:
- rtl8366rb: respect device tree config of the CPU port
- Ethernet PHYs:
- support Broadcom BCM5221 PHYs
- TI dp83867: support hardware LED blinking
- CAN:
- add support for Linux-PHY based CAN transceivers
- at91_can: clean up and use rx-offload helpers
- WiFi:
- MediaTek (mt76):
- new sub-driver for mt7925 USB/PCIe devices
- HW wireless <> Ethernet bridging in MT7988 chips
- mt7603/mt7628 stability improvements
- Qualcomm (ath12k):
- WCN7850:
- enable 320 MHz channels in 6 GHz band
- hardware rfkill support
- enable IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS
to make scan faster
- read board data variant name from SMBIOS
- QCN9274: mesh support
- RealTek (rtw89):
- TDMA-based multi-channel concurrency (MCC)
- Silicon Labs (wfx):
- Remain-On-Channel (ROC) support
- Bluetooth:
- ISO: many improvements for broadcast support
- mark BCM4378/BCM4387 as BROKEN_LE_CODED
- add support for QCA2066
- btmtksdio: enable Bluetooth wakeup from suspend
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=46nS
-----END PGP SIGNATURE-----
Merge tag 'net-next-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core & protocols:
- Support usec resolution of TCP timestamps, enabled selectively by a
route attribute.
- Defer regular TCP ACK while processing socket backlog, try to send
a cumulative ACK at the end. Increase single TCP flow performance
on a 200Gbit NIC by 20% (100Gbit -> 120Gbit).
- The Fair Queuing (FQ) packet scheduler:
- add built-in 3 band prio / WRR scheduling
- support bypass if the qdisc is mostly idle (5% speed up for TCP RR)
- improve inactive flow reporting
- optimize the layout of structures for better cache locality
- Support TCP Authentication Option (RFC 5925, TCP-AO), a more modern
replacement for the old MD5 option.
- Add more retransmission timeout (RTO) related statistics to
TCP_INFO.
- Support sending fragmented skbs over vsock sockets.
- Make sure we send SIGPIPE for vsock sockets if socket was
shutdown().
- Add sysctl for ignoring lower limit on lifetime in Router
Advertisement PIO, based on an in-progress IETF draft.
- Add sysctl to control activation of TCP ping-pong mode.
- Add sysctl to make connection timeout in MPTCP configurable.
- Support rcvlowat and notsent_lowat on MPTCP sockets, to help apps
limit the number of wakeups.
- Support netlink GET for MDB (multicast forwarding), allowing user
space to request a single MDB entry instead of dumping the entire
table.
- Support selective FDB flushing in the VXLAN tunnel driver.
- Allow limiting learned FDB entries in bridges, prevent OOM attacks.
- Allow controlling via configfs netconsole targets which were
created via the kernel cmdline at boot, rather than via configfs at
runtime.
- Support multiple PTP timestamp event queue readers with different
filters.
- MCTP over I3C.
BPF:
- Add new veth-like netdevice where BPF program defines the logic of
the xmit routine. It can operate in L3 and L2 mode.
- Support exceptions - allow asserting conditions which should never
be true but are hard for the verifier to infer. With some extra
flexibility around handling of the exit / failure:
https://lwn.net/Articles/938435/
- Add support for local per-cpu kptr, allow allocating and storing
per-cpu objects in maps. Access to those objects operates on the
value for the current CPU.
This allows to deprecate local one-off implementations of per-CPU
storage like BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE maps.
- Extend cgroup BPF sockaddr hooks for UNIX sockets. The use case is
for systemd to re-implement the LogNamespace feature which allows
running multiple instances of systemd-journald to process the logs
of different services.
- Enable open-coded task_vma iteration, after maple tree conversion
made it hard to directly walk VMAs in tracing programs.
- Add open-coded task, css_task and css iterator support. One of the
use cases is customizable OOM victim selection via BPF.
- Allow source address selection with bpf_*_fib_lookup().
- Add ability to pin BPF timer to the current CPU.
- Prevent creation of infinite loops by combining tail calls and
fentry/fexit programs.
- Add missed stats for kprobes to retrieve the number of missed
kprobe executions and subsequent executions of BPF programs.
- Inherit system settings for CPU security mitigations.
- Add BPF v4 CPU instruction support for arm32 and s390x.
Changes to common code:
- overflow: add DEFINE_FLEX() for on-stack definition of structs with
flexible array members.
- Process doc update with more guidance for reviewers.
Driver API:
- Simplify locking in WiFi (cfg80211 and mac80211 layers), use wiphy
mutex in most places and remove a lot of smaller locks.
- Create a common DPLL configuration API. Allow configuring and
querying state of PLL circuits used for clock syntonization, in
network time distribution.
- Unify fragmented and full page allocation APIs in page pool code.
Let drivers be ignorant of PAGE_SIZE.
- Rework PHY state machine to avoid races with calls to phy_stop().
- Notify DSA drivers of MAC address changes on user ports, improve
correctness of offloads which depend on matching port MAC
addresses.
- Allow antenna control on injected WiFi frames.
- Reduce the number of variants of napi_schedule().
- Simplify error handling when composing devlink health messages.
Misc:
- A lot of KCSAN data race "fixes", from Eric.
- A lot of __counted_by() annotations, from Kees.
- A lot of strncpy -> strscpy and printf format fixes.
- Replace master/slave terminology with conduit/user in DSA drivers.
- Handful of KUnit tests for netdev and WiFi core.
Removed:
- AppleTalk COPS.
- AppleTalk ipddp.
- TI AR7 CPMAC Ethernet driver.
Drivers:
- Ethernet high-speed NICs:
- Intel (100G, ice, idpf):
- add a driver for the Intel E2000 IPUs
- make CRC/FCS stripping configurable
- cross-timestamping for E823 devices
- basic support for E830 devices
- use aux-bus for managing client drivers
- i40e: report firmware versions via devlink
- nVidia/Mellanox:
- support 4-port NICs
- increase max number of channels to 256
- optimize / parallelize SF creation flow
- Broadcom (bnxt):
- enhance NIC temperature reporting
- support PAM4 speeds and lane configuration
- Marvell OcteonTX2:
- PTP pulse-per-second output support
- enable hardware timestamping for VFs
- Solarflare/AMD:
- conntrack NAT offload and offload for tunnels
- Wangxun (ngbe/txgbe):
- expose HW statistics
- Pensando/AMD:
- support PCI level reset
- narrow down the condition under which skbs are linearized
- Netronome/Corigine (nfp):
- support CHACHA20-POLY1305 crypto in IPsec offload
- Ethernet NICs embedded, slower, virtual:
- Synopsys (stmmac):
- add Loongson-1 SoC support
- enable use of HW queues with no offload capabilities
- enable PPS input support on all 5 channels
- increase TX coalesce timer to 5ms
- RealTek USB (r8152): improve efficiency of Rx by using GRO frags
- xen: support SW packet timestamping
- add drivers for implementations based on TI's PRUSS (AM64x EVM)
- nVidia/Mellanox Ethernet datacenter switches:
- avoid poor HW resource use on Spectrum-4 by better block
selection for IPv6 multicast forwarding and ordering of blocks
in ACL region
- Ethernet embedded switches:
- Microchip:
- support configuring the drive strength for EMI compliance
- ksz9477: partial ACL support
- ksz9477: HSR offload
- ksz9477: Wake on LAN
- Realtek:
- rtl8366rb: respect device tree config of the CPU port
- Ethernet PHYs:
- support Broadcom BCM5221 PHYs
- TI dp83867: support hardware LED blinking
- CAN:
- add support for Linux-PHY based CAN transceivers
- at91_can: clean up and use rx-offload helpers
- WiFi:
- MediaTek (mt76):
- new sub-driver for mt7925 USB/PCIe devices
- HW wireless <> Ethernet bridging in MT7988 chips
- mt7603/mt7628 stability improvements
- Qualcomm (ath12k):
- WCN7850:
- enable 320 MHz channels in 6 GHz band
- hardware rfkill support
- enable IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS to
make scan faster
- read board data variant name from SMBIOS
- QCN9274: mesh support
- RealTek (rtw89):
- TDMA-based multi-channel concurrency (MCC)
- Silicon Labs (wfx):
- Remain-On-Channel (ROC) support
- Bluetooth:
- ISO: many improvements for broadcast support
- mark BCM4378/BCM4387 as BROKEN_LE_CODED
- add support for QCA2066
- btmtksdio: enable Bluetooth wakeup from suspend"
* tag 'net-next-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1816 commits)
net: pcs: xpcs: Add 2500BASE-X case in get state for XPCS drivers
net: bpf: Use sockopt_lock_sock() in ip_sock_set_tos()
net: mana: Use xdp_set_features_flag instead of direct assignment
vxlan: Cleanup IFLA_VXLAN_PORT_RANGE entry in vxlan_get_size()
iavf: delete the iavf client interface
iavf: add a common function for undoing the interrupt scheme
iavf: use unregister_netdev
iavf: rely on netdev's own registered state
iavf: fix the waiting time for initial reset
iavf: in iavf_down, don't queue watchdog_task if comms failed
iavf: simplify mutex_trylock+sleep loops
iavf: fix comments about old bit locks
doc/netlink: Update schema to support cmd-cnt-name and cmd-max-name
tools: ynl: introduce option to process unknown attributes or types
ipvlan: properly track tx_errors
netdevsim: Block until all devices are released
nfp: using napi_build_skb() to replace build_skb()
net: dsa: microchip: ksz9477: Fix spelling mistake "Enery" -> "Energy"
net: dsa: microchip: Ensure Stable PME Pin State for Wake-on-LAN
net: dsa: microchip: Refactor switch shutdown routine for WoL preparation
...
- Add LKDTM test for stuck CPUs (Mark Rutland)
- Improve LKDTM selftest behavior under UBSan (Ricardo Cañuelo)
- Refactor more 1-element arrays into flexible arrays (Gustavo A. R. Silva)
- Analyze and replace strlcpy and strncpy uses (Justin Stitt, Azeem Shaikh)
- Convert group_info.usage to refcount_t (Elena Reshetova)
- Add __counted_by annotations (Kees Cook, Gustavo A. R. Silva)
- Add Kconfig fragment for basic hardening options (Kees Cook, Lukas Bulwahn)
- Fix randstruct GCC plugin performance mode to stay in groups (Kees Cook)
- Fix strtomem() compile-time check for small sources (Kees Cook)
-----BEGIN PGP SIGNATURE-----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=0iVF
-----END PGP SIGNATURE-----
Merge tag 'hardening-v6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening updates from Kees Cook:
"One of the more voluminous set of changes is for adding the new
__counted_by annotation[1] to gain run-time bounds checking of
dynamically sized arrays with UBSan.
- Add LKDTM test for stuck CPUs (Mark Rutland)
- Improve LKDTM selftest behavior under UBSan (Ricardo Cañuelo)
- Refactor more 1-element arrays into flexible arrays (Gustavo A. R.
Silva)
- Analyze and replace strlcpy and strncpy uses (Justin Stitt, Azeem
Shaikh)
- Convert group_info.usage to refcount_t (Elena Reshetova)
- Add __counted_by annotations (Kees Cook, Gustavo A. R. Silva)
- Add Kconfig fragment for basic hardening options (Kees Cook, Lukas
Bulwahn)
- Fix randstruct GCC plugin performance mode to stay in groups (Kees
Cook)
- Fix strtomem() compile-time check for small sources (Kees Cook)"
* tag 'hardening-v6.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (56 commits)
hwmon: (acpi_power_meter) replace open-coded kmemdup_nul
reset: Annotate struct reset_control_array with __counted_by
kexec: Annotate struct crash_mem with __counted_by
virtio_console: Annotate struct port_buffer with __counted_by
ima: Add __counted_by for struct modsig and use struct_size()
MAINTAINERS: Include stackleak paths in hardening entry
string: Adjust strtomem() logic to allow for smaller sources
hardening: x86: drop reference to removed config AMD_IOMMU_V2
randstruct: Fix gcc-plugin performance mode to stay in group
mailbox: zynqmp: Annotate struct zynqmp_ipi_pdata with __counted_by
drivers: thermal: tsens: Annotate struct tsens_priv with __counted_by
irqchip/imx-intmux: Annotate struct intmux_data with __counted_by
KVM: Annotate struct kvm_irq_routing_table with __counted_by
virt: acrn: Annotate struct vm_memory_region_batch with __counted_by
hwmon: Annotate struct gsc_hwmon_platform_data with __counted_by
sparc: Annotate struct cpuinfo_tree with __counted_by
isdn: kcapi: replace deprecated strncpy with strscpy_pad
isdn: replace deprecated strncpy with strscpy
NFS/flexfiles: Annotate struct nfs4_ff_layout_segment with __counted_by
nfs41: Annotate struct nfs4_file_layout_dsaddr with __counted_by
...
As pointed out by Linus, closure_sync() was racy; we could skip blocking
immediately after a get() and a put(), but then that would skip any
barrier corresponding to the other thread's put() barrier.
To fix this, always do the full __closure_sync() sequence whenever any
get() has happened and the closure might have been used by other
threads.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
atomic_(dec|sub)_return_release() are a thing now - use them.
Also, delete the useless barrier in set_closure_fn(): it's redundant
with the memory barrier in closure_put(0.
Since closure_put() would now otherwise just have a release barrier, we
also need a new barrier when the ref hits 0 -
smp_acquire__after_ctrl_dep().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
- Fair scheduler (SCHED_OTHER) improvements:
- Remove the old and now unused SIS_PROP code & option
- Scan cluster before LLC in the wake-up path
- Use candidate prev/recent_used CPU if scanning failed for cluster wakeup
- NUMA scheduling improvements:
- Improve the VMA access-PID code to better skip/scan VMAs
- Extend tracing to cover VMA-skipping decisions
- Improve/fix the recently introduced sched_numa_find_nth_cpu() code
- Generalize numa_map_to_online_node()
- Energy scheduling improvements:
- Remove the EM_MAX_COMPLEXITY limit
- Add tracepoints to track energy computation
- Make the behavior of the 'sched_energy_aware' sysctl more consistent
- Consolidate and clean up access to a CPU's max compute capacity
- Fix uclamp code corner cases
- RT scheduling improvements:
- Drive dl_rq->overloaded with dl_rq->pushable_dl_tasks updates
- Drive the ->rto_mask with rt_rq->pushable_tasks updates
- Scheduler scalability improvements:
- Rate-limit updates to tg->load_avg
- On x86 disable IBRS when CPU is offline to improve single-threaded performance
- Micro-optimize in_task() and in_interrupt()
- Micro-optimize the PSI code
- Avoid updating PSI triggers and ->rtpoll_total when there are no state changes
- Core scheduler infrastructure improvements:
- Use saved_state to reduce some spurious freezer wakeups
- Bring in a handful of fast-headers improvements to scheduler headers
- Make the scheduler UAPI headers more widely usable by user-space
- Simplify the control flow of scheduler syscalls by using lock guards
- Fix sched_setaffinity() vs. CPU hotplug race
- Scheduler debuggability improvements:
- Disallow writing invalid values to sched_rt_period_us
- Fix a race in the rq-clock debugging code triggering warnings
- Fix a warning in the bandwidth distribution code
- Micro-optimize in_atomic_preempt_off() checks
- Enforce that the tasklist_lock is held in for_each_thread()
- Print the TGID in sched_show_task()
- Remove the /proc/sys/kernel/sched_child_runs_first sysctl
- Misc cleanups & fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=GDqb
-----END PGP SIGNATURE-----
Merge tag 'sched-core-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"Fair scheduler (SCHED_OTHER) improvements:
- Remove the old and now unused SIS_PROP code & option
- Scan cluster before LLC in the wake-up path
- Use candidate prev/recent_used CPU if scanning failed for cluster
wakeup
NUMA scheduling improvements:
- Improve the VMA access-PID code to better skip/scan VMAs
- Extend tracing to cover VMA-skipping decisions
- Improve/fix the recently introduced sched_numa_find_nth_cpu() code
- Generalize numa_map_to_online_node()
Energy scheduling improvements:
- Remove the EM_MAX_COMPLEXITY limit
- Add tracepoints to track energy computation
- Make the behavior of the 'sched_energy_aware' sysctl more
consistent
- Consolidate and clean up access to a CPU's max compute capacity
- Fix uclamp code corner cases
RT scheduling improvements:
- Drive dl_rq->overloaded with dl_rq->pushable_dl_tasks updates
- Drive the ->rto_mask with rt_rq->pushable_tasks updates
Scheduler scalability improvements:
- Rate-limit updates to tg->load_avg
- On x86 disable IBRS when CPU is offline to improve single-threaded
performance
- Micro-optimize in_task() and in_interrupt()
- Micro-optimize the PSI code
- Avoid updating PSI triggers and ->rtpoll_total when there are no
state changes
Core scheduler infrastructure improvements:
- Use saved_state to reduce some spurious freezer wakeups
- Bring in a handful of fast-headers improvements to scheduler
headers
- Make the scheduler UAPI headers more widely usable by user-space
- Simplify the control flow of scheduler syscalls by using lock
guards
- Fix sched_setaffinity() vs. CPU hotplug race
Scheduler debuggability improvements:
- Disallow writing invalid values to sched_rt_period_us
- Fix a race in the rq-clock debugging code triggering warnings
- Fix a warning in the bandwidth distribution code
- Micro-optimize in_atomic_preempt_off() checks
- Enforce that the tasklist_lock is held in for_each_thread()
- Print the TGID in sched_show_task()
- Remove the /proc/sys/kernel/sched_child_runs_first sysctl
... and misc cleanups & fixes"
* tag 'sched-core-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (82 commits)
sched/fair: Remove SIS_PROP
sched/fair: Use candidate prev/recent_used CPU if scanning failed for cluster wakeup
sched/fair: Scan cluster before scanning LLC in wake-up path
sched: Add cpus_share_resources API
sched/core: Fix RQCF_ACT_SKIP leak
sched/fair: Remove unused 'curr' argument from pick_next_entity()
sched/nohz: Update comments about NEWILB_KICK
sched/fair: Remove duplicate #include
sched/psi: Update poll => rtpoll in relevant comments
sched: Make PELT acronym definition searchable
sched: Fix stop_one_cpu_nowait() vs hotplug
sched/psi: Bail out early from irq time accounting
sched/topology: Rename 'DIE' domain to 'PKG'
sched/psi: Delete the 'update_total' function parameter from update_triggers()
sched/psi: Avoid updating PSI triggers and ->rtpoll_total when there are no state changes
sched/headers: Remove comment referring to rq::cpu_load, since this has been removed
sched/numa: Complete scanning of inactive VMAs when there is no alternative
sched/numa: Complete scanning of partial VMAs regardless of PID activity
sched/numa: Move up the access pid reset logic
sched/numa: Trace decisions related to skipping VMAs
...
- Futex improvements:
- Add the 'futex2' syscall ABI, which is an attempt to get away from the
multiplex syscall and adds a little room for extentions, while lifting
some limitations.
- Fix futex PI recursive rt_mutex waiter state bug
- Fix inter-process shared futexes on no-MMU systems
- Use folios instead of pages
- Micro-optimizations of locking primitives:
- Improve arch_spin_value_unlocked() on asm-generic ticket spinlock
architectures, to improve lockref code generation.
- Improve the x86-32 lockref_get_not_zero() main loop by adding
build-time CMPXCHG8B support detection for the relevant lockref code,
and by better interfacing the CMPXCHG8B assembly code with the compiler.
- Introduce arch_sync_try_cmpxchg() on x86 to improve sync_try_cmpxchg()
code generation. Convert some sync_cmpxchg() users to sync_try_cmpxchg().
- Micro-optimize rcuref_put_slowpath()
- Locking debuggability improvements:
- Improve CONFIG_DEBUG_RT_MUTEXES=y to have a fast-path as well
- Enforce atomicity of sched_submit_work(), which is de-facto atomic but
was un-enforced previously.
- Extend <linux/cleanup.h>'s no_free_ptr() with __must_check semantics
- Fix ww_mutex self-tests
- Clean up const-propagation in <linux/seqlock.h> and simplify
the API-instantiation macros a bit.
- RT locking improvements:
- Provide the rt_mutex_*_schedule() primitives/helpers and use them
in the rtmutex code to avoid recursion vs. rtlock on the PI state.
- Add nested blocking lockdep asserts to rt_mutex_lock(), rtlock_lock()
and rwbase_read_lock().
- Plus misc fixes & cleanups
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=36Ff
-----END PGP SIGNATURE-----
Merge tag 'locking-core-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking updates from Info Molnar:
"Futex improvements:
- Add the 'futex2' syscall ABI, which is an attempt to get away from
the multiplex syscall and adds a little room for extentions, while
lifting some limitations.
- Fix futex PI recursive rt_mutex waiter state bug
- Fix inter-process shared futexes on no-MMU systems
- Use folios instead of pages
Micro-optimizations of locking primitives:
- Improve arch_spin_value_unlocked() on asm-generic ticket spinlock
architectures, to improve lockref code generation
- Improve the x86-32 lockref_get_not_zero() main loop by adding
build-time CMPXCHG8B support detection for the relevant lockref
code, and by better interfacing the CMPXCHG8B assembly code with
the compiler
- Introduce arch_sync_try_cmpxchg() on x86 to improve
sync_try_cmpxchg() code generation. Convert some sync_cmpxchg()
users to sync_try_cmpxchg().
- Micro-optimize rcuref_put_slowpath()
Locking debuggability improvements:
- Improve CONFIG_DEBUG_RT_MUTEXES=y to have a fast-path as well
- Enforce atomicity of sched_submit_work(), which is de-facto atomic
but was un-enforced previously.
- Extend <linux/cleanup.h>'s no_free_ptr() with __must_check
semantics
- Fix ww_mutex self-tests
- Clean up const-propagation in <linux/seqlock.h> and simplify the
API-instantiation macros a bit
RT locking improvements:
- Provide the rt_mutex_*_schedule() primitives/helpers and use them
in the rtmutex code to avoid recursion vs. rtlock on the PI state.
- Add nested blocking lockdep asserts to rt_mutex_lock(),
rtlock_lock() and rwbase_read_lock()
.. plus misc fixes & cleanups"
* tag 'locking-core-2023-10-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits)
futex: Don't include process MM in futex key on no-MMU
locking/seqlock: Fix grammar in comment
alpha: Fix up new futex syscall numbers
locking/seqlock: Propagate 'const' pointers within read-only methods, remove forced type casts
locking/lockdep: Fix string sizing bug that triggers a format-truncation compiler-warning
locking/seqlock: Change __seqprop() to return the function pointer
locking/seqlock: Simplify SEQCOUNT_LOCKNAME()
locking/atomics: Use atomic_try_cmpxchg_release() to micro-optimize rcuref_put_slowpath()
locking/atomic, xen: Use sync_try_cmpxchg() instead of sync_cmpxchg()
locking/atomic/x86: Introduce arch_sync_try_cmpxchg()
locking/atomic: Add generic support for sync_try_cmpxchg() and its fallback
locking/seqlock: Fix typo in comment
futex/requeue: Remove unnecessary ‘NULL’ initialization from futex_proxy_trylock_atomic()
locking/local, arch: Rewrite local_add_unless() as a static inline function
locking/debug: Fix debugfs API return value checks to use IS_ERR()
locking/ww_mutex/test: Make sure we bail out instead of livelock
locking/ww_mutex/test: Fix potential workqueue corruption
locking/ww_mutex/test: Use prng instead of rng to avoid hangs at bootup
futex: Add sys_futex_requeue()
futex: Add flags2 argument to futex_requeue()
...
Here's the bcachefs filesystem pull request.
One new patch since last week: the exportfs constants ended up
conflicting with other filesystems that are also getting added to the
global enum, so switched to new constants picked by Amir.
I'll also be sending another pull request later on in the cycle bringing
things up to date my master branch that people are currently running;
that will be restricted to fs/bcachefs/, naturally.
Testing - fstests as well as the bcachefs specific tests in ktest:
https://evilpiepirate.org/~testdashboard/ci?branch=bcachefs-for-upstream
It's also been soaking in linux-next, which resulted in a whole bunch of
smatch complaints and fixes and a patch or two from Kees.
The only new non fs/bcachefs/ patch is the objtool patch that adds
bcachefs functions to the list of noreturns. The patch that exports
osq_lock() has been dropped for now, per Ingo.
Prereq patch list:
faf1dce852 objtool: Add bcachefs noreturns
73badee428 lib/generic-radix-tree.c: Add peek_prev()
9492261ff2 lib/generic-radix-tree.c: Don't overflow in peek()
0fb5d567f5 MAINTAINERS: Add entry for generic-radix-tree
b414e8ecd4 closures: Add a missing include
48b7935722 closures: closure_nr_remaining()
ced58fc7ab closures: closure_wait_event()
bd0d22e41e MAINTAINERS: Add entry for closures
8c8d2d9670 bcache: move closures to lib/
957e48087d locking: export contention tracepoints for bcachefs six locks
21db931445 lib: Export errname
83feeb1955 lib/string_helpers: string_get_size() now returns characters wrote
7d672f4094 stacktrace: Export stack_trace_save_tsk
771eb4fe8b fs: factor out d_mark_tmpfile()
2b69987be5 sched: Add task_struct->faults_disabled_mapping
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEKnAFLkS8Qha+jvQrE6szbY3KbnYFAmU/wyIACgkQE6szbY3K
bnZc1xAAqjQBGXdtgtKQvk0/ru0WaMZguMsOHd3BUXIbm30F6eJqnoXQ/ahALofc
Ju6NrOgcy9wmdPKWpbeF+aK3WnkAW9jShDd0QieVH6PkhyYyh5r11iR/EVtjjLu5
6Teodn8fyTqn9WSDtKG15QreTCJrEasAoGFQKQDA8oiXC7zc+RSpLUkkTWD/pxyW
zVqkGGiAUG4x6FON+X2a3QBa9WCahIgV6XzHstGLsmOECxKO/LopGR5jThuIhv9t
Yo0wodQTKAgb9QviG6V3f2dJLQKKUVDmVEGTXv+8Hl3d8CiYBJeIh+icp+VESBo1
m8ev0y2xbTPLwgm5v0Uj4o/G8ISZ+qmcexV2zQ9xUWUAd2AjEBzhCh9BrNXM5qSg
o7mphH+Pt6bJXgzxb2RkYJixU11yG3yuHPOCrRGGFpVHiNYhdHuJeDZOqChWZB8x
6kY0uvU0X0tqVfWKxMwTwuqG8mJ5BkJNvnEvYi05QEZG0dDcUhgOqYlNNaL8vGkl
qVixOwE4aH4kscdmW2gXY1c76VSebheyN8n6Wj1zrmTw4hTJH7ZWXPtmbRqQzpB6
U6w3NjVyopbIjuF+syWeGqitTT/8fpvgZU4E9MpKGmHX4ADgecp6YSZQzzxTJn7D
cbVX7YQxhmsM50C1PW7A8yLCspD/uRNiKLvzb/g9gFSInk4rV+U=
=g+ia
-----END PGP SIGNATURE-----
Merge tag 'bcachefs-2023-10-30' of https://evilpiepirate.org/git/bcachefs
Pull initial bcachefs updates from Kent Overstreet:
"Here's the bcachefs filesystem pull request.
One new patch since last week: the exportfs constants ended up
conflicting with other filesystems that are also getting added to the
global enum, so switched to new constants picked by Amir.
The only new non fs/bcachefs/ patch is the objtool patch that adds
bcachefs functions to the list of noreturns. The patch that exports
osq_lock() has been dropped for now, per Ingo"
* tag 'bcachefs-2023-10-30' of https://evilpiepirate.org/git/bcachefs: (2781 commits)
exportfs: Change bcachefs fid_type enum to avoid conflicts
bcachefs: Refactor memcpy into direct assignment
bcachefs: Fix drop_alloc_keys()
bcachefs: snapshot_create_lock
bcachefs: Fix snapshot skiplists during snapshot deletion
bcachefs: bch2_sb_field_get() refactoring
bcachefs: KEY_TYPE_error now counts towards i_sectors
bcachefs: Fix handling of unknown bkey types
bcachefs: Switch to unsafe_memcpy() in a few places
bcachefs: Use struct_size()
bcachefs: Correctly initialize new buckets on device resize
bcachefs: Fix another smatch complaint
bcachefs: Use strsep() in split_devs()
bcachefs: Add iops fields to bch_member
bcachefs: Rename bch_sb_field_members -> bch_sb_field_members_v1
bcachefs: New superblock section members_v2
bcachefs: Add new helper to retrieve bch_member from sb
bcachefs: bucket_lock() is now a sleepable lock
bcachefs: fix crc32c checksum merge byte order problem
bcachefs: Fix bch2_inode_delete_keys()
...
This release completes the SunRPC thread scheduler work that was
begun in v6.6. The scheduler can now find an svc thread to wake in
constant time and without a list walk. Thanks again to Neil Brown
for this overhaul.
Lorenzo Bianconi contributed infrastructure for a netlink-based
NFSD control plane. The long-term plan is to provide the same
functionality as found in /proc/fs/nfsd, plus some interesting
additions, and then migrate the NFSD user space utilities to
netlink.
A long series to overhaul NFSD's NFSv4 operation encoding was
applied in this release. The goals are to bring this family of
encoding functions in line with the matching NFSv4 decoding
functions and with the NFSv2 and NFSv3 XDR functions, preparing
the way for better memory safety and maintainability.
A further improvement to NFSD's write delegation support was
contributed by Dai Ngo. This adds a CB_GETATTR callback,
enabling the server to retrieve cached size and mtime data from
clients holding write delegations. If the server can retrieve
this information, it does not have to recall the delegation in
some cases.
The usual panoply of bug fixes and minor improvements round out
this release. As always I am grateful to all contributors,
reviewers, and testers.
-----BEGIN PGP SIGNATURE-----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=B4wJ
-----END PGP SIGNATURE-----
Merge tag 'nfsd-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Pull nfsd updates from Chuck Lever:
"This release completes the SunRPC thread scheduler work that was begun
in v6.6. The scheduler can now find an svc thread to wake in constant
time and without a list walk. Thanks again to Neil Brown for this
overhaul.
Lorenzo Bianconi contributed infrastructure for a netlink-based NFSD
control plane. The long-term plan is to provide the same functionality
as found in /proc/fs/nfsd, plus some interesting additions, and then
migrate the NFSD user space utilities to netlink.
A long series to overhaul NFSD's NFSv4 operation encoding was applied
in this release. The goals are to bring this family of encoding
functions in line with the matching NFSv4 decoding functions and with
the NFSv2 and NFSv3 XDR functions, preparing the way for better memory
safety and maintainability.
A further improvement to NFSD's write delegation support was
contributed by Dai Ngo. This adds a CB_GETATTR callback, enabling the
server to retrieve cached size and mtime data from clients holding
write delegations. If the server can retrieve this information, it
does not have to recall the delegation in some cases.
The usual panoply of bug fixes and minor improvements round out this
release. As always I am grateful to all contributors, reviewers, and
testers"
* tag 'nfsd-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux: (127 commits)
svcrdma: Fix tracepoint printk format
svcrdma: Drop connection after an RDMA Read error
NFSD: clean up alloc_init_deleg()
NFSD: Fix frame size warning in svc_export_parse()
NFSD: Rewrite synopsis of nfsd_percpu_counters_init()
nfsd: Clean up errors in nfs3proc.c
nfsd: Clean up errors in nfs4state.c
NFSD: Clean up errors in stats.c
NFSD: simplify error paths in nfsd_svc()
NFSD: Clean up nfsd4_encode_seek()
NFSD: Clean up nfsd4_encode_offset_status()
NFSD: Clean up nfsd4_encode_copy_notify()
NFSD: Clean up nfsd4_encode_copy()
NFSD: Clean up nfsd4_encode_test_stateid()
NFSD: Clean up nfsd4_encode_exchange_id()
NFSD: Clean up nfsd4_do_encode_secinfo()
NFSD: Clean up nfsd4_encode_access()
NFSD: Clean up nfsd4_encode_readdir()
NFSD: Clean up nfsd4_encode_entry4()
NFSD: Add an nfsd4_encode_nfs_cookie4() helper
...
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCZTppQwAKCRCRxhvAZXjc
om2kAP4u+eLsrhJHfUPUttGUEkSkZE+5/s/f1A/1GcV51usLSgEAu8urxAnP49GW
INaDABXaFfKx8/KI/H2YFZPKGwlNEwY=
=PDDE
-----END PGP SIGNATURE-----
Merge tag 'vfs-6.7.iov_iter' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs
Pull iov_iter updates from Christian Brauner:
"This contain's David's iov_iter cleanup work to convert the iov_iter
iteration macros to inline functions:
- Remove last_offset from iov_iter as it was only used by ITER_PIPE
- Add a __user tag on copy_mc_to_user()'s dst argument on x86 to
match that on powerpc and get rid of a sparse warning
- Convert iter->user_backed to user_backed_iter() in the sound PCM
driver
- Convert iter->user_backed to user_backed_iter() in a couple of
infiniband drivers
- Renumber the type enum so that the ITER_* constants match the order
in iterate_and_advance*()
- Since the preceding patch puts UBUF and IOVEC at 0 and 1, change
user_backed_iter() to just use the type value and get rid of the
extra flag
- Convert the iov_iter iteration macros to always-inline functions to
make the code easier to follow. It uses function pointers, but they
get optimised away
- Move the check for ->copy_mc to _copy_from_iter() and
copy_page_from_iter_atomic() rather than in memcpy_from_iter_mc()
where it gets repeated for every segment. Instead, we check once
and invoke a side function that can use iterate_bvec() rather than
iterate_and_advance() and supply a different step function
- Move the copy-and-csum code to net/ where it can be in proximity
with the code that uses it
- Fold memcpy_and_csum() in to its two users
- Move csum_and_copy_from_iter_full() out of line and merge in
csum_and_copy_from_iter() since the former is the only caller of
the latter
- Move hash_and_copy_to_iter() to net/ where it can be with its only
caller"
* tag 'vfs-6.7.iov_iter' of gitolite.kernel.org:pub/scm/linux/kernel/git/vfs/vfs:
iov_iter, net: Move hash_and_copy_to_iter() to net/
iov_iter, net: Merge csum_and_copy_from_iter{,_full}() together
iov_iter, net: Fold in csum_and_memcpy()
iov_iter, net: Move csum_and_copy_to/from_iter() to net/
iov_iter: Don't deal with iter->copy_mc in memcpy_from_iter_mc()
iov_iter: Convert iterate*() to inline funcs
iov_iter: Derive user-backedness from the iterator type
iov_iter: Renumber ITER_* constants
infiniband: Use user_backed_iter() to see if iterator is UBUF/IOVEC
sound: Fix snd_pcm_readv()/writev() to use iov access functions
iov_iter, x86: Be consistent about the __user tag on copy_mc_to_user()
iov_iter: Remove last_offset from iov_iter as it was for ITER_PIPE
Solve two ergonomic issues with struct seq_buf;
1) Too much boilerplate is required to initialize:
struct seq_buf s;
char buf[32];
seq_buf_init(s, buf, sizeof(buf));
Instead, we can build this directly on the stack. Provide
DECLARE_SEQ_BUF() macro to do this:
DECLARE_SEQ_BUF(s, 32);
2) %NUL termination is fragile and requires 2 steps to get a valid
C String (and is a layering violation exposing the "internals" of
seq_buf):
seq_buf_terminate(s);
do_something(s->buffer);
Instead, we can just return s->buffer directly after terminating it in
the refactored seq_buf_terminate(), now known as seq_buf_str():
do_something(seq_buf_str(s));
Link: https://lore.kernel.org/linux-trace-kernel/20231027155634.make.260-kees@kernel.org
Link: https://lore.kernel.org/linux-trace-kernel/20231026194033.it.702-kees@kernel.org/
Cc: Yosry Ahmed <yosryahmed@google.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Yun Zhou <yun.zhou@windriver.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Cc: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Some of the routines in ACPI driver/acpi/tables.c can be shared with
parsing CDAT. CDAT is a device-provided data structure that is formatted
similar to a platform provided ACPI table. CDAT is used by CXL and can
exist on platforms that do not use ACPI. Split out the common routine
from ACPI to accommodate platforms that do not support ACPI and move that
to /lib. The common routines can be built outside of ACPI if
FIRMWARE_TABLES is selected.
Link: https://lore.kernel.org/linux-cxl/CAJZ5v0jipbtTNnsA0-o5ozOk8ZgWnOg34m34a9pPenTyRLj=6A@mail.gmail.com/
Suggested-by: "Rafael J. Wysocki" <rafael@kernel.org>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Acked-by: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/169713683430.2205276.17899451119920103445.stgit@djiang5-mobl3
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
As kernel test robot reported, lib/test_objpool.c (trace:probes/for-next)
has linux/version.h included, but version.h is not used at all. Then more
unused headers are found in test_objpool.c and rethook.c, and all of them
should be removed.
Link: https://lore.kernel.org/all/20231023112245.6112-1-wuqiang.matt@bytedance.com/
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202310191512.vvypKU5Z-lkp@intel.com/
Signed-off-by: wuqiang.matt <wuqiang.matt@bytedance.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
To make seq_buf more lightweight as a string buf, move the readpos member
from seq_buf to its container, trace_seq. That puts the responsibility
of maintaining the readpos entirely in the tracing code. If some future
users want to package up the readpos with a seq_buf, we can define a
new struct then.
Link: https://lore.kernel.org/linux-trace-kernel/20231020033545.2587554-2-willy@infradead.org
Cc: Kees Cook <keescook@chromium.org>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Kent Overstreet <kent.overstreet@linux.dev>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
We currently push everyone to use padding to align 64b values
in netlink. Un-padded nla_put_u64() doesn't even exist any more.
The story behind this possibly start with this thread:
https://lore.kernel.org/netdev/20121204.130914.1457976839967676240.davem@davemloft.net/
where DaveM was concerned about the alignment of a structure
containing 64b stats. If user space tries to access such struct
directly:
struct some_stats *stats = nla_data(attr);
printf("A: %llu", stats->a);
lack of alignment may become problematic for some architectures.
These days we most often put every single member in a separate
attribute, meaning that the code above would use a helper like
nla_get_u64(), which can deal with alignment internally.
Even for arches which don't have good unaligned access - access
aligned to 4B should be pretty efficient.
Kernel and well known libraries deal with unaligned input already.
Padded 64b is quite space-inefficient (64b + pad means at worst 16B
per attr vs 32b which takes 8B). It is also more typing:
if (nla_put_u64_pad(rsp, NETDEV_A_SOMETHING_SOMETHING,
value, NETDEV_A_SOMETHING_PAD))
Create a new attribute type which will use 32 bits at netlink
level if value is small enough (probably most of the time?),
and (4B-aligned) 64 bits otherwise. Kernel API is just:
if (nla_put_uint(rsp, NETDEV_A_SOMETHING_SOMETHING, value))
Calling this new type "just" sint / uint with no specific size
will hopefully also make people more comfortable with using it.
Currently telling people "don't use u8, you may need the bits,
and netlink will round up to 4B, anyway" is the #1 comment
we give to newcomers.
In terms of netlink layout it looks like this:
0 4 8 12 16
32b: [nlattr][ u32 ]
64b: [ pad ][nlattr][ u64 ]
uint(32) [nlattr][ u32 ]
uint(64) [nlattr][ u64 ]
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds genradix_peek_prev(), genradix_iter_rewind(), and
genradix_for_each_reverse(), for iterating backwards over a generic
radix tree.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
When we started spreading new inode numbers throughout most of the 64
bit inode space, that triggered some corner case bugs, in particular
some integer overflows related to the radix tree code. Oops.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Prep work for bcachefs - being a fork of bcache it also uses closures
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Acked-by: Coly Li <colyli@suse.de>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
__read_mostly predates __ro_after_init. Many variables which are marked
__read_mostly should have been __ro_after_init from day 1.
Also, mark some stuff as "const" and "__init" while I'm at it.
[akpm@linux-foundation.org: revert sysctl_nr_open_min, sysctl_nr_open_max changes due to arm warning]
[akpm@linux-foundation.org: coding-style cleanups]
Link: https://lkml.kernel.org/r/4f6bb9c0-abba-4ee4-a7aa-89265e886817@p183
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Though tmpfs does not need it, percpu_counter_limited_add() can be twice
as useful if it works sensibly with negative amounts (subs) - typically
decrements towards a limit of 0 or nearby: as suggested by Dave Chinner.
And in the course of that reworking, skip the percpu counter sum if it is
already obvious that the limit would be passed: as suggested by Tim Chen.
Extend the comment above __percpu_counter_limited_add(), defining the
behaviour with positive and negative amounts, allowing negative limits,
but not bothering about overflow beyond S64_MAX.
Link: https://lkml.kernel.org/r/8f86083b-c452-95d4-365b-f16a2e4ebcd4@google.com
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Carlos Maiolino <cem@kernel.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Darrick J. Wong <djwong@kernel.org>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Tim Chen <tim.c.chen@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Percpu counter's compare and add are separate functions: without locking
around them (which would defeat their purpose), it has been possible to
overflow the intended limit. Imagine all the other CPUs fallocating tmpfs
huge pages to the limit, in between this CPU's compare and its add.
I have not seen reports of that happening; but tmpfs's recent addition of
dquot_alloc_block_nodirty() in between the compare and the add makes it
even more likely, and I'd be uncomfortable to leave it unfixed.
Introduce percpu_counter_limited_add(fbc, limit, amount) to prevent it.
I believe this implementation is correct, and slightly more efficient than
the combination of compare and add (taking the lock once rather than twice
when nearing full - the last 128MiB of a tmpfs volume on a machine with
128 CPUs and 4KiB pages); but it does beg for a better design - when
nearing full, there is no new batching, but the costly percpu counter sum
across CPUs still has to be done, while locked.
Follow __percpu_counter_sum()'s example, including cpu_dying_mask as well
as cpu_online_mask: but shouldn't __percpu_counter_compare() and
__percpu_counter_limited_add() then be adding a num_dying_cpus() to
num_online_cpus(), when they calculate the maximum which could be held
across CPUs? But the times when it matters would be vanishingly rare.
Link: https://lkml.kernel.org/r/bb817848-2d19-bcc8-39ca-ea179af0f0b4@google.com
Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Tim Chen <tim.c.chen@intel.com>
Cc: Dave Chinner <dchinner@redhat.com>
Cc: Darrick J. Wong <djwong@kernel.org>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Carlos Maiolino <cem@kernel.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Chuck Lever <chuck.lever@oracle.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Users complained about OOM errors during fork without triggering
compaction. This can be fixed by modifying the flags used in
mas_expected_entries() so that the compaction will be triggered in low
memory situations. Since mas_expected_entries() is only used during fork,
the extra argument does not need to be passed through.
Additionally, the two test_maple_tree test cases and one benchmark test
were altered to use the correct locking type so that allocations would not
trigger sleeping and thus fail. Testing was completed with lockdep atomic
sleep detection.
The additional locking change requires rwsem support additions to the
tools/ directory through the use of pthreads pthread_rwlock_t. With this
change test_maple_tree works in userspace, as a module, and in-kernel.
Users may notice that the system gave up early on attempting to start new
processes instead of attempting to reclaim memory.
Link: https://lkml.kernel.org/r/20230915093243epcms1p46fa00bbac1ab7b7dca94acb66c44c456@epcms1p4
Link: https://lkml.kernel.org/r/20231012155233.2272446-1-Liam.Howlett@oracle.com
Fixes: 54a611b605 ("Maple Tree: add new data structure")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reviewed-by: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: <jason.sim@samsung.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This introduces partial support for the Qualcomm Secure Execution
Environment SCM interface, and uses this to implement EFI variable
access on the Windows On Snapdragon devices (for now).
The 32/64-bit calling convention detector of the SCM interface is
updated to not choose 64-bit convention when Linux is 32-bit. The
"extern" specifier is dropped from the interface include file.
The LLCC driver gains support for carrying configuration for multiple
different system/DDR configurations for a given platform, and selecting
between them. Support for Q[DR]U1000 is added to the driver.
All exported symbols are transitioned to EXPORT_SYMBOL_GPL().
The platform_drivers in the Qualcomm SoC are transitioned to the
void-returning remove_new implementation.
The rmtfs memory driver gains support for leaving guard pages around the
used area, to avoid issues if the allocation happens to be placed
adjacent to another protected memory region.
The socinfo driver gains knowledge about IPQ8174, QCM6490, SM7150P and
various PMICs used together with SM8550.
-----BEGIN PGP SIGNATURE-----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=B1Kn
-----END PGP SIGNATURE-----
gpgsig -----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEiK/NIGsWEZVxh/FrYKtH/8kJUicFAmUv9yoACgkQYKtH/8kJ
UifTOQ/+NUj5Y/sAZfMLY3Q3e8s2nsKZLHHUCH7O/DOR6ILc5DZcTI5a23kfIA9V
VVluTEnRUzbSHCb3WPW3Yfgy5HpZoaLgXWXGgCsRVKRIODN745TOm2Hn/dFZF0Z7
Fso0oPplGKrvuxSlaxg+1fbJ7c5r8kE/TDu+ok0eiZGvzwfnVas4bB+27thdH/le
tY/wS9BhHmBrs6k7gqCfEFWF7M6kS29FOPILIlAfxgUevgSIvAUMBH/KUAGw1Qo/
UNd372TwXkdw0pG2KOx8xR4iKFBfWX4PbHBtBbUZzAnqerDnNrh7p0qTlhfKXOpb
jQWx3eqQIwFbbWZ39DxiLE8/h5ig3jF29u1s/vAG2Zb5o5cYwiRM7OjWW8Q8Ha1E
ha2NSWMEaNniegnMeoy1VTN8uSYY+dUseKmLmP5vCobmYVKuX96iQx5pNBYhsrwN
YOlkOkF1fXINFqSD5v2N4s4AdGx634GgP7azkjm6fGS+hlwKgWNzwH4HHgXNx/u/
IPRPw7U/hji2R++oNPtEOlNHoHWM6Zx0ema38qGTC69uAFHETxbFUmOBaX6q/7Ot
AwpP25YozehwDoUVZRwR6CpHcVbKDl4oJhWaruflkxC+6YFTGYS2hPFiF6zbnQw9
u36QDkgNzhBG2LINlmqCAAoGWmC+mqwsqYN/DyKsUUSVEODyUng=
=7XXT
-----END PGP SIGNATURE-----
Merge tag 'qcom-drivers-for-6.7' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux into soc/drivers
Qualcomm driver updates for v6.7
This introduces partial support for the Qualcomm Secure Execution
Environment SCM interface, and uses this to implement EFI variable
access on the Windows On Snapdragon devices (for now).
The 32/64-bit calling convention detector of the SCM interface is
updated to not choose 64-bit convention when Linux is 32-bit. The
"extern" specifier is dropped from the interface include file.
The LLCC driver gains support for carrying configuration for multiple
different system/DDR configurations for a given platform, and selecting
between them. Support for Q[DR]U1000 is added to the driver.
All exported symbols are transitioned to EXPORT_SYMBOL_GPL().
The platform_drivers in the Qualcomm SoC are transitioned to the
void-returning remove_new implementation.
The rmtfs memory driver gains support for leaving guard pages around the
used area, to avoid issues if the allocation happens to be placed
adjacent to another protected memory region.
The socinfo driver gains knowledge about IPQ8174, QCM6490, SM7150P and
various PMICs used together with SM8550.
* tag 'qcom-drivers-for-6.7' of https://git.kernel.org/pub/scm/linux/kernel/git/qcom/linux: (44 commits)
soc: qcom: socinfo: Convert to platform remove callback returning void
soc: qcom: smsm: Convert to platform remove callback returning void
soc: qcom: smp2p: Convert to platform remove callback returning void
soc: qcom: smem: Convert to platform remove callback returning void
soc: qcom: rmtfs_mem: Convert to platform remove callback returning void
soc: qcom: qcom_stats: Convert to platform remove callback returning void
soc: qcom: qcom_gsbi: Convert to platform remove callback returning void
soc: qcom: qcom_aoss: Convert to platform remove callback returning void
soc: qcom: pmic_glink: Convert to platform remove callback returning void
soc: qcom: ocmem: Convert to platform remove callback returning void
soc: qcom: llcc-qcom: Convert to platform remove callback returning void
soc: qcom: icc-bwmon: Convert to platform remove callback returning void
firmware: qcom_scm: use 64-bit calling convention only when client is 64-bit
soc: qcom: llcc: Handle a second device without data corruption
soc: qcom: Switch to EXPORT_SYMBOL_GPL()
soc: qcom: smem: Annotate struct qcom_smem with __counted_by
soc: qcom: rmtfs: Support discarding guard pages
dt-bindings: reserved-memory: rmtfs: Allow guard pages
dt-bindings: firmware: qcom,scm: document IPQ5018 compatible
firmware: qcom_scm: disable SDI if required
...
Link: https://lore.kernel.org/r/20231015204014.855672-1-andersson@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The test_objpool module (test_objpool) will run several testcases
for objpool stress and performance evaluation. Each testcase will
have all available cpu cores involved to create a situation of high
parallel and high contention.
As of now there are 5 groups and 5 * 2 testcases in total:
1) group 1: synchronous mode
objpool is managed synchronously, that is, all objects are to be
reclaimed before objpool finalization and the objpool owner makes
sure of it. All threads on different cores run in the same pace
2) group 2: synchronous mode + hrtimer
this case have 2 customers: normal threads and hrtimer softirqs
3) group 3: synchronous + overrun mode
This test group is mainly for performance evaluation of missing
cases when pre-allocated objects are less than the requested
4) group 4: asynchronous mode
This case is just an emulation of kretprobe, with refcount used
to control the objpool lifecycle
5) group 5: asynchronous mode with hrtimer
hrtimer softirq is introduced to stress async objpool operations
Link: https://lore.kernel.org/all/20231017135654.82270-3-wuqiang.matt@bytedance.com/
Signed-off-by: wuqiang.matt <wuqiang.matt@bytedance.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
objpool is a scalable implementation of high performance queue for
object allocation and reclamation, such as kretprobe instances.
With leveraging percpu ring-array to mitigate hot spots of memory
contention, it delivers near-linear scalability for high parallel
scenarios. The objpool is best suited for the following cases:
1) Memory allocation or reclamation are prohibited or too expensive
2) Consumers are of different priorities, such as irqs and threads
Limitations:
1) Maximum objects (capacity) is fixed after objpool creation
2) All pre-allocated objects are managed in percpu ring array,
which consumes more memory than linked lists
Link: https://lore.kernel.org/all/20231017135654.82270-2-wuqiang.matt@bytedance.com/
Signed-off-by: wuqiang.matt <wuqiang.matt@bytedance.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Now that bitmap_*_region() functions are implemented as thin wrappers
around others, it's worth to move them to the header, as it opens room
for compile-time optimizations.
CC: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
CC: Rasmus Villemoes <linux@rasmusvillemoes.dk>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
lwq is a FIFO single-linked queue that only requires a spinlock
for dequeueing, which happens in process context. Enqueueing is atomic
with no spinlock and can happen in any context.
This is particularly useful when work items are queued from BH or IRQ
context, and when they are handled one at a time by dedicated threads.
Avoiding any locking when enqueueing means there is no need to disable
BH or interrupts, which is generally best avoided (particularly when
there are any RT tasks on the machine).
This solution is superior to using "list_head" links because we need
half as many pointers in the data structures, and because list_head
lists would need locking to add items to the queue.
This solution is superior to a bespoke solution as all locking and
container_of casting is integrated, so the interface is simple.
Despite the similar name, this solution meets a distinctly different
need to kfifo. kfifo provides a fixed sized circular buffer to which
data can be added at one end and removed at the other, and does not
provide any locking. lwq does not have any size limit and works with
data structures (objects?) rather than data (bytes).
A unit test for basic functionality, which runs at boot time, is included.
Signed-off-by: NeilBrown <neilb@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Liam R. Howlett" <Liam.Howlett@oracle.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: David Gow <davidgow@google.com>
Cc: linux-kernel@vger.kernel.org
Message-Id: <20230911111333.4d1a872330e924a00acb905b@linux-foundation.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
llist_del_first_this() deletes a specific entry from an llist, providing
it is at the head of the list. Multiple threads can call this
concurrently providing they each offer a different entry.
This can be uses for a set of worker threads which are on the llist when
they are idle. The head can always be woken, and when it is woken it
can remove itself, and possibly wake the next if there is an excess of
work to do.
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Now that all _reg_op() users are switched to alternative functions,
_reg_op() machinery is not needed anymore.
CC: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
CC: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
_reg_op(REG_OP_ISFREE) can be trivially replaced with find_next_bit().
Doing that opens room for potential small_const_nbits() optimization.
CC: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
CC: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Fix comments so that scripts/kernel-doc doesn't warn, and fix for-loop
stype in bitmap_find_free_region().
CC: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
lib/bitmap.c and corresponding include/linux/bitmap.h are intended to
hold functions related to operations on bitmaps, like bitmap_shift or
bitmap_set. Historically, some string-related operations like
bitmap_parse are also reside in lib/bitmap.c.
Now that the subsystem evolves, string-related bitmap operations became a
significant part of the file. Because they are quite different from the
other bitmap functions by nature, it's worth to split them to a separate
source/header files.
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
CC: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Besides the fact it's not used anywhere it should be implemented
differently, i.e. via helpers from linux/byteorder/generic.h.
Yet the helpers themselves need to be introduced first.
Also note, the function lacks of the test cases, they must be provided.
Hence, drop the current dead code for good.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
A map in which each element is mapped to itself is called an "identity
map".
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Clean up some punctutation and abbreviations.
Add kernel-doc notation for one function and function return value
for 39 functions.
cpumask.h:
Fix some punctuation (plural vs. possessive).
Fix some abbreviations (ie. -> i.e., id -> ID).
Fix 35 warnings like this:
include/linux/cpumask.h:161: warning: No description found for return value of 'cpumask_first'
cpumask.c:
Add Return: value for 4 functions.
Add kernel-doc for cpumask_any_distribute().
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Use atomic_try_cmpxchg() instead of atomic_cmpxchg(*ptr, old, new) == old
in rcuref_put_slowpath(). On x86 the CMPXCHG instruction returns success in the
ZF flag, so this change saves a compare after CMPXCHG. Additionaly,
the compiler reorders some code blocks to follow likely/unlikely
annotations in the atomic_try_cmpxchg() macro, improving the code from:
9a: f0 0f b1 0b lock cmpxchg %ecx,(%rbx)
9e: 83 f8 ff cmp $0xffffffff,%eax
a1: 74 04 je a7 <rcuref_put_slowpath+0x27>
a3: 31 c0 xor %eax,%eax
to:
9a: f0 0f b1 0b lock cmpxchg %ecx,(%rbx)
9e: 75 4c jne ec <rcuref_put_slowpath+0x6c>
a0: b0 01 mov $0x1,%al
No functional change intended.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/r/20230509150255.3691-1-ubizjak@gmail.com
Move hash_and_copy_to_iter() to be with its only caller in networking code.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-13-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: "David S. Miller" <davem@davemloft.net>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
cc: netdev@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Move csum_and_copy_to/from_iter() to net code now that the iteration
framework can be #included.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-10-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: "David S. Miller" <davem@davemloft.net>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
cc: netdev@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
iter->copy_mc is only used with a bvec iterator and only by
dump_emit_page() in fs/coredump.c so rather than handle this in
memcpy_from_iter_mc() where it is checked repeatedly by _copy_from_iter()
and copy_page_from_iter_atomic(),
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-9-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
PowerPC has a 'btext' font used for the console which is almost identical
to the shared font_sun8x16, so use it rather than duplicating the data.
They were actually identical until about a decade ago when
commit bcfbeecea1 ("drivers: console: font_: Change a glyph from
"broken bar" to "vertical line"")
which changed the | in the shared font to be a solid
bar rather than a broken bar. That's the only difference.
This was originally spotted by the PMF source code analyser, which
noticed that sparc does the same thing with the same data, and they
also share a bunch of functions to manipulate the data. I've previously
posted a near identical patch for sparc.
Tested very lightly with a boot without FS in qemu.
Signed-off-by: "Dr. David Alan Gilbert" <linux@treblig.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230825142754.1487900-1-linux@treblig.org
When updating the maple tree iterator to avoid rewalks, an issue was
introduced when shifting beyond the limits. This can be seen by trying to
go to the previous address of 0, which would set the maple node to
MAS_NONE and keep the range as the last entry.
Subsequent calls to mas_find() would then search upwards from mas->last
and skip the value at mas->index/mas->last. This showed up as a bug in
mprotect which skips the actual VMA at the current range after attempting
to go to the previous VMA from 0.
Since MAS_NONE may already be set when searching for a value that isn't
contained within a node, changing the handling of MAS_NONE in mas_find()
would make the code more complicated and error prone. Furthermore, there
was no way to tell which limit was hit, and thus which action to take
(next or the entry at the current range).
This solution is to add two states to track what happened with the
previous iterator action. This allows for the expected behaviour of the
next command to return the correct item (either the item at the range
requested, or the next/previous).
Tests are also added and updated accordingly.
Link: https://lkml.kernel.org/r/20230921181236.509072-3-Liam.Howlett@oracle.com
Link: https://gist.github.com/heatd/85d2971fae1501b55b6ea401fbbe485b
Link: https://lore.kernel.org/linux-mm/20230921181236.509072-1-Liam.Howlett@oracle.com/
Fixes: 39193685d5 ("maple_tree: try harder to keep active node with mas_prev()")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reported-by: Pedro Falcato <pedro.falcato@gmail.com>
Closes: https://gist.github.com/heatd/85d2971fae1501b55b6ea401fbbe485b
Closes: https://bugs.archlinux.org/task/79656
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
If the outer layer for loop is iterated more than once and it fails not
in the first iteration, the filtered_suite and filtered_suite->test_cases
allocated in the last kunit_filter_attr_tests() in last inner for loop
is leaked.
So add a new free_filtered_suite err label and free the filtered_suite
and filtered_suite->test_cases so far. And change kmalloc_array of copy
to kcalloc to Clear the copy to make the kfree safe.
Fixes: 529534e8cb ("kunit: Add ability to filter attributes")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
If the outer layer for loop is iterated more than once and it fails not
in the first iteration, the copy pointer has been moved. So it should free
the original copy's backup copy_start.
Fixes: abbf73816b ("kunit: fix possible memory leak in kunit_filter_suites()")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Convert the iov_iter iteration macros to inline functions to make the code
easier to follow.
The functions are marked __always_inline as we don't want to end up with
indirect calls in the code. This, however, leaves dealing with ->copy_mc
in an awkard situation since the step function (memcpy_from_iter_mc())
needs to test the flag in the iterator, but isn't passed the iterator.
This will be dealt with in a follow-up patch.
The variable names in the per-type iterator functions have been harmonised
as much as possible and made clearer as to the variable purpose.
The iterator functions are also moved to a header file so that other
operations that need to scan over an iterator can be added. For instance,
the rbd driver could use this to scan a buffer to see if it is all zeros
and libceph could use this to generate a crc.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/3710261.1691764329@warthog.procyon.org.uk/ # v1
Link: https://lore.kernel.org/r/855.1692047347@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/20230816120741.534415-1-dhowells@redhat.com/ # v3
Link: https://lore.kernel.org/r/20230925120309.1731676-8-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Use the iterator type to determine whether an iterator is user-backed or
not rather than using a special flag for it. Now that ITER_UBUF and
ITER_IOVEC are 0 and 1, they can be checked with a single comparison.
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20230925120309.1731676-7-dhowells@redhat.com
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Jens Axboe <axboe@kernel.dk>
cc: Christoph Hellwig <hch@lst.de>
cc: Christian Brauner <christian@brauner.io>
cc: Matthew Wilcox <willy@infradead.org>
cc: Linus Torvalds <torvalds@linux-foundation.org>
cc: David Laight <David.Laight@ACULAB.COM>
cc: linux-block@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
strlcpy() reads the entire source buffer first.
This read may exceed the destination size limit.
This is both inefficient and can lead to linear read
overflows if a source string is not NUL-terminated [1].
In an effort to remove strlcpy() completely [2], replace
strlcpy() here with strscpy().
Direct replacement is safe here since return value of -errno
is used to check for truncation instead of sizeof(dest).
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89
Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230831140104.207019-1-azeemshaikh38@gmail.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Use proper kernel-doc notation to prevent build warnings:
lib/argv_split.c:36: warning: Function parameter or member 'argv' not described in 'argv_free'
lib/argv_split.c:61: warning: No description found for return value of 'argv_split'
Link: https://lkml.kernel.org/r/20230912060838.3794-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Describe missing function parameters to prevent kernel-doc warnings:
lib/scatterlist.c:288: warning: Function parameter or member 'first_chunk' not described in '__sg_alloc_table'
lib/scatterlist.c:800: warning: Function parameter or member 'flags' not described in 'sg_miter_start'
Link: https://lkml.kernel.org/r/20230912060848.4673-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
If we skip one parametrized test case then test status remains
SKIP for all subsequent test params leading to wrong reports:
$ ./tools/testing/kunit/kunit.py run \
--kunitconfig ./lib/kunit/.kunitconfig *.example_params*
--raw_output \
[ ] Starting KUnit Kernel (1/1)...
KTAP version 1
1..1
# example: initializing suite
KTAP version 1
# Subtest: example
# module: kunit_example_test
1..1
KTAP version 1
# Subtest: example_params_test
# example_params_test: initializing
# example_params_test: cleaning up
ok 1 example value 3 # SKIP unsupported param value 3
# example_params_test: initializing
# example_params_test: cleaning up
ok 2 example value 2 # SKIP unsupported param value 3
# example_params_test: initializing
# example_params_test: cleaning up
ok 3 example value 1 # SKIP unsupported param value 3
# example_params_test: initializing
# example_params_test: cleaning up
ok 4 example value 0 # SKIP unsupported param value 0
# example_params_test: pass:0 fail:0 skip:4 total:4
ok 1 example_params_test # SKIP unsupported param value 0
# example: exiting suite
ok 1 example # SKIP
Reset test status and status comment after each param iteration
to avoid using stale results.
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: David Gow <davidgow@google.com>
Cc: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add a test of the speed and memory use of string_stream.
string_stream_performance_test() doesn't actually "test" anything (it
cannot fail unless the system has run out of allocatable memory) but it
measures the speed and memory consumption of the string_stream and reports
the result.
This allows changes in the string_stream implementation to be compared.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Replace the fixed-size log buffer with a string_stream so that the
log can grow as lines are added.
The existing kunit log tests have been updated for using a
string_stream as the log. No new test have been added because there
are already tests for the underlying string_stream.
As the log tests now depend on string_stream functions they cannot
build when kunit-test is a module. They have been surrounded by
a #if to replace them with skipping version when the test is
build as a module. Though this isn't pretty, it avoids moving
code to another file while that code is also being changed.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
string_stream_managed_free_test() allocates a resource-managed
string_stream and tests that kunit_free_string_stream() calls
string_stream_destroy().
string_stream_resource_free_test() allocates a resource-managed
string_stream and tests that string_stream_destroy() is called
when the test resources are cleaned up.
The old string_stream_init_test() has been split into two tests,
one for kunit_alloc_string_stream() and the other for
alloc_string_stream().
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Re-work string_stream so that it is not tied to a struct kunit. This is
to allow using it for the log of struct kunit_suite.
Instead of resource-managing individual allocations the whole string_stream
can be resource-managed, if required.
alloc_string_stream() now allocates a string stream that is
not resource-managed.
string_stream_destroy() now works on an unmanaged string_stream
allocated by alloc_string_stream() and frees the entire
string_stream (previously it only freed the fragments).
string_stream_clear() has been made public for callers that
want to free the fragments without destroying the string_stream.
For resource-managed allocations use kunit_alloc_string_stream()
and kunit_free_string_stream().
In addition to this, string_stream_get_string() now returns an
unmanaged buffer that the caller must kfree().
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add function kunit_alloc_string_stream() to do a resource-managed
allocation of a string stream, and corresponding
kunit_free_string_stream() to free the resource-managed stream.
This is preparing for decoupling the string_stream
implementation from struct kunit, to reduce the amount of code
churn when that happens. Currently:
- kunit_alloc_string_stream() only calls alloc_string_stream().
- kunit_free_string_stream() takes a struct kunit* which
isn't used yet.
Callers of the old alloc_string_stream() and
string_stream_destroy() are all requesting a managed allocation
so have been changed to use the new functions.
alloc_string_stream() has been temporarily made static because
its current behavior has been replaced with
kunit_alloc_string_stream().
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
There is no need to use a test-managed alloc in is_literal().
The function frees the temporary buffer before returning.
This removes the only use of the test and gfp members of
struct string_stream outside of the string_stream implementation.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add test cases for testing the string_stream feature that appends a
newline to strings that do not already end with a newline.
string_stream_no_auto_newline_test() tests with this feature disabled.
Newlines should not be added or dropped.
string_stream_auto_newline_test() tests with this feature enabled.
Newlines should be added to lines that do not end with a newline.
string_stream_append_auto_newline_test() tests appending the
content of one stream to another stream when the target stream
has newline appending enabled.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add an optional feature to string_stream that will append a newline to
any added string that does not already end with a newline. The purpose
of this is so that string_stream can be used to collect log lines.
This is enabled/disabled by calling string_stream_set_append_newlines().
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Replace the minimal tests with more-thorough testing.
string_stream_init_test() tests that struct string_stream is
initialized correctly.
string_stream_line_add_test() adds a series of numbered lines and
checks that the resulting string contains all the lines.
string_stream_variable_length_line_test() adds a large number of
lines of varying length to create many fragments, then tests that all
lines are present.
string_stream_append_test() tests various cases of using
string_stream_append() to append the content of one stream to another.
Adds string_stream_append_empty_string_test() to test that adding an
empty string to a string_stream doesn't create a new empty fragment.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
If the result of the formatted string is an empty string just return
instead of creating an empty fragment.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Alexei Starovoitov says:
====================
The following pull-request contains BPF updates for your *net-next* tree.
We've added 73 non-merge commits during the last 9 day(s) which contain
a total of 79 files changed, 5275 insertions(+), 600 deletions(-).
The main changes are:
1) Basic BTF validation in libbpf, from Andrii Nakryiko.
2) bpf_assert(), bpf_throw(), exceptions in bpf progs, from Kumar Kartikeya Dwivedi.
3) next_thread cleanups, from Oleg Nesterov.
4) Add mcpu=v4 support to arm32, from Puranjay Mohan.
5) Add support for __percpu pointers in bpf progs, from Yonghong Song.
6) Fix bpf tailcall interaction with bpf trampoline, from Leon Hwang.
7) Raise irq_work in bpf_mem_alloc while irqs are disabled to improve refill probabablity, from Hou Tao.
Please consider pulling these changes from:
git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git
Thanks a lot!
Also thanks to reporters, reviewers and testers of commits in this pull-request:
Alan Maguire, Andrey Konovalov, Dave Marchevsky, "Eric W. Biederman",
Jiri Olsa, Maciej Fijalkowski, Quentin Monnet, Russell King (Oracle),
Song Liu, Stanislav Fomichev, Yonghong Song
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The BPF JITs now support cpuv4 instructions. Add tests for these new
instructions to the test suite:
1. Sign extended Load
2. Sign extended Mov
3. Unconditional byte swap
4. Unconditional jump with 32-bit offset
5. Signed division and modulo
Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Link: https://lore.kernel.org/r/20230907230550.1417590-9-puranjay12@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
sched_numa_find_nth_cpu() doesn't handle NUMA_NO_NODE properly, and
may crash kernel if passed with it. On the other hand, the only user
of sched_numa_find_nth_cpu() has to check NUMA_NO_NODE case explicitly.
It would be easier for users if this logic will get moved into
sched_numa_find_nth_cpu().
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Mel Gorman <mgorman@suse.de>
Link: https://lore.kernel.org/r/20230819141239.287290-6-yury.norov@gmail.com
Add a ucs2_strscpy() function for UCS-2 strings. The behavior is
equivalent to the standard strscpy() function, just for 16-bit character
UCS-2 strings.
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230827211408.689076-2-luzmaximilian@gmail.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This kunit update for Linux 6.6-rc2 consists of important fixes to
possible memory leak, null-ptr-deref, wild-memory-access, and error
path bugs.
-----BEGIN PGP SIGNATURE-----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=wiS6
-----END PGP SIGNATURE-----
Merge tag 'linux-kselftest-kunit-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kunit fixes from Shuah Khan:
"Fixes to possible memory leak, null-ptr-deref, wild-memory-access, and
error path bugs"
* tag 'linux-kselftest-kunit-6.6-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
kunit: Fix possible memory leak in kunit_filter_suites()
kunit: Fix possible null-ptr-deref in kunit_parse_glob_filter()
kunit: Fix the wrong err path and add goto labels in kunit_filter_suites()
kunit: Fix wild-memory-access bug in kunit_free_suite_set()
kunit: test: Make filter strings in executor_test writable
errname() returns the name of an errcode; this functionality is
otherwise only available for error pointers via %pE - bcachefs uses this
for better error messages.
Signed-off-by: Christopher James Halse Rogers <raof@ubuntu.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
printbuf now needs to know the number of characters that would have been
written if the buffer was too small, like snprintf(); this changes
string_get_size() to return the the return value of snprintf().
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Drop Itanium support from the RAID6 code, and along with it, the 16x and
32x unrolled versions, which were only used by IA64.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
The Itanium architecture is obsolete, and an informal survey [0] reveals
that any residual use of Itanium hardware in production is mostly HP-UX
or OpenVMS based. The use of Linux on Itanium appears to be limited to
enthusiasts that occasionally boot a fresh Linux kernel to see whether
things are still working as intended, and perhaps to churn out some
distro packages that are rarely used in practice.
None of the original companies behind Itanium still produce or support
any hardware or software for the architecture, and it is listed as
'Orphaned' in the MAINTAINERS file, as apparently, none of the engineers
that contributed on behalf of those companies (nor anyone else, for that
matter) have been willing to support or maintain the architecture
upstream or even be responsible for applying the odd fix. The Intel
firmware team removed all IA-64 support from the Tianocore/EDK2
reference implementation of EFI in 2018. (Itanium is the original
architecture for which EFI was developed, and the way Linux supports it
deviates significantly from other architectures.) Some distros, such as
Debian and Gentoo, still maintain [unofficial] ia64 ports, but many have
dropped support years ago.
While the argument is being made [1] that there is a 'for the common
good' angle to being able to build and run existing projects such as the
Grid Community Toolkit [2] on Itanium for interoperability testing, the
fact remains that none of those projects are known to be deployed on
Linux/ia64, and very few people actually have access to such a system in
the first place. Even if there were ways imaginable in which Linux/ia64
could be put to good use today, what matters is whether anyone is
actually doing that, and this does not appear to be the case.
There are no emulators widely available, and so boot testing Itanium is
generally infeasible for ordinary contributors. GCC still supports IA-64
but its compile farm [3] no longer has any IA-64 machines. GLIBC would
like to get rid of IA-64 [4] too because it would permit some overdue
code cleanups. In summary, the benefits to the ecosystem of having IA-64
be part of it are mostly theoretical, whereas the maintenance overhead
of keeping it supported is real.
So let's rip off the band aid, and remove the IA-64 arch code entirely.
This follows the timeline proposed by the Debian/ia64 maintainer [5],
which removes support in a controlled manner, leaving IA-64 in a known
good state in the most recent LTS release. Other projects will follow
once the kernel support is removed.
[0] https://lore.kernel.org/all/CAMj1kXFCMh_578jniKpUtx_j8ByHnt=s7S+yQ+vGbKt9ud7+kQ@mail.gmail.com/
[1] https://lore.kernel.org/all/0075883c-7c51-00f5-2c2d-5119c1820410@web.de/
[2] https://gridcf.org/gct-docs/latest/index.html
[3] https://cfarm.tetaneutral.net/machines/list/
[4] https://lore.kernel.org/all/87bkiilpc4.fsf@mid.deneb.enyo.de/
[5] https://lore.kernel.org/all/ff58a3e76e5102c94bb5946d99187b358def688a.camel@physik.fu-berlin.de/
Acked-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Add some kunit tests for page extraction for ITER_BVEC, ITER_KVEC and
ITER_XARRAY type iterators. ITER_UBUF and ITER_IOVEC aren't dealt with
as they require userspace VM interaction. ITER_DISCARD isn't dealt with
either as that can't be extracted.
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Hildenbrand <david@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Add some kunit tests for page extraction for ITER_BVEC, ITER_KVEC and
ITER_XARRAY type iterators. ITER_UBUF and ITER_IOVEC aren't dealt with
as they require userspace VM interaction. ITER_DISCARD isn't dealt with
either as that does nothing.
Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Hildenbrand <david@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
iov_iter_extract_pages() doesn't correctly handle skipping over initial
zero-length entries in ITER_KVEC and ITER_BVEC-type iterators.
The problem is that it accidentally reduces maxsize to 0 when it
skipping and thus runs to the end of the array and returns 0.
Fix this by sticking the calculated size-to-copy in a new variable
rather than back in maxsize.
Fixes: 7d58fe7310 ("iov_iter: Add a function to extract a page list from an iterator")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Hildenbrand <david@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Fix a bug encountered by people using bittorrent where they'd get
NULL pointer dereferences on page cache lookups when using XFS
- Two documentation fixes
-----BEGIN PGP SIGNATURE-----
iQEzBAABCgAdFiEEejHryeLBw/spnjHrDpNsjXcpgj4FAmT7XLYACgkQDpNsjXcp
gj6qrAf+LiAs3dUELOjrqaQQbbNGp4na+YwJCiezuvwZn8P+ieJpt6QCEDHEb1jH
LCOjr0GFMhHnAWp9Q0Qay4IXoKk8DPkA/avSaZgsl5blmMyNqFMgHklU7mjRvhCG
ayb/NeZYwrJhA9NyueXYuH3h7QDryxyIN3TZS1/7z13YrohMIQeu3q7X/ZBMh7NS
uPd7vmDj8TnZ/agQzplQ4XDov9lrzkUXDJqpMvn/Gbr4K7y66UZa3SLxi1JPrnah
ffDvBlK2OImNBoaADfiRImWc7QlXVkF/B08xUcJ6tXAeO6xJDykkie+gjsF2S040
YP2YIG+IWi47zqa25EuxFRtavwUh6w==
=4GKy
-----END PGP SIGNATURE-----
Merge tag 'xarray-6.6' of git://git.infradead.org/users/willy/xarray
Pull xarray fixes from Matthew Wilcox:
- Fix a bug encountered by people using bittorrent where they'd get
NULL pointer dereferences on page cache lookups when using XFS
- Two documentation fixes
* tag 'xarray-6.6' of git://git.infradead.org/users/willy/xarray:
idr: fix param name in idr_alloc_cyclic() doc
xarray: Document necessary flag in alloc functions
XArray: Do not return sibling entries from xa_load()
1, Allow usage of LSX/LASX in the kernel;
2, Add SIMD-optimized RAID5/RAID6 routines;
3, Add Loongson Binary Translation (LBT) extension support;
4, Add basic KGDB & KDB support;
5, Add building with kcov coverage;
6, Add KFENCE (Kernel Electric-Fence) support;
7, Add KASAN (Kernel Address Sanitizer) support;
8, Some bug fixes and other small changes;
9, Update the default config file.
-----BEGIN PGP SIGNATURE-----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=NXy2
-----END PGP SIGNATURE-----
Merge tag 'loongarch-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch updates from Huacai Chen:
- Allow usage of LSX/LASX in the kernel, and use them for
SIMD-optimized RAID5/RAID6 routines
- Add Loongson Binary Translation (LBT) extension support
- Add basic KGDB & KDB support
- Add building with kcov coverage
- Add KFENCE (Kernel Electric-Fence) support
- Add KASAN (Kernel Address Sanitizer) support
- Some bug fixes and other small changes
- Update the default config file
* tag 'loongarch-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (25 commits)
LoongArch: Update Loongson-3 default config file
LoongArch: Add KASAN (Kernel Address Sanitizer) support
LoongArch: Simplify the processing of jumping new kernel for KASLR
kasan: Add (pmd|pud)_init for LoongArch zero_(pud|p4d)_populate process
kasan: Add __HAVE_ARCH_SHADOW_MAP to support arch specific mapping
LoongArch: Add KFENCE (Kernel Electric-Fence) support
LoongArch: Get partial stack information when providing regs parameter
LoongArch: mm: Add page table mapped mode support for virt_to_page()
kfence: Defer the assignment of the local variable addr
LoongArch: Allow building with kcov coverage
LoongArch: Provide kaslr_offset() to get kernel offset
LoongArch: Add basic KGDB & KDB support
LoongArch: Add Loongson Binary Translation (LBT) extension support
raid6: Add LoongArch SIMD recovery implementation
raid6: Add LoongArch SIMD syndrome calculation
LoongArch: Add SIMD-optimized XOR routines
LoongArch: Allow usage of LSX/LASX in the kernel
LoongArch: Define symbol 'fault' as a local label in fpu.S
LoongArch: Adjust {copy, clear}_user exception handler behavior
LoongArch: Use static defined zero page rather than allocated
...
Similar to the syndrome calculation, the recovery algorithms also work
on 64 bytes at a time to align with the L1 cache line size of current
and future LoongArch cores (that we care about). Which means
unrolled-by-4 LSX and unrolled-by-2 LASX code.
The assembly is originally based on the x86 SSSE3/AVX2 ports, but
register allocation has been redone to take advantage of LSX/LASX's 32
vector registers, and instruction sequence has been optimized to suit
(e.g. LoongArch can perform per-byte srl and andi on vectors, but x86
cannot).
Performance numbers measured by instrumenting the raid6test code, on a
3A5000 system clocked at 2.5GHz:
> lasx 2data: 354.987 MiB/s
> lasx datap: 350.430 MiB/s
> lsx 2data: 340.026 MiB/s
> lsx datap: 337.318 MiB/s
> intx1 2data: 164.280 MiB/s
> intx1 datap: 187.966 MiB/s
Because recovery algorithms are chosen solely based on priority and
availability, lasx is marked as priority 2 and lsx priority 1. At least
for the current generation of LoongArch micro-architectures, LASX should
always be faster than LSX whenever supported, and have similar power
consumption characteristics (because the only known LASX-capable uarch,
the LA464, always compute the full 256-bit result for vector ops).
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
The algorithms work on 64 bytes at a time, which is the L1 cache line
size of all current and future LoongArch cores (that we care about), as
confirmed by Huacai. The code is based on the generic int.uc algorithm,
unrolled 4 times for LSX and 2 times for LASX. Further unrolling does
not meaningfully improve the performance according to experiments.
Performance numbers measured during system boot on a 3A5000 @ 2.5GHz:
> raid6: lasx gen() 12726 MB/s
> raid6: lsx gen() 10001 MB/s
> raid6: int64x8 gen() 2876 MB/s
> raid6: int64x4 gen() 3867 MB/s
> raid6: int64x2 gen() 2531 MB/s
> raid6: int64x1 gen() 1945 MB/s
Comparison of xor() speeds (from different boots but meaningful anyway):
> lasx: 11226 MB/s
> lsx: 6395 MB/s
> int64x4: 2147 MB/s
Performance as measured by raid6test:
> raid6: lasx gen() 25109 MB/s
> raid6: lsx gen() 13233 MB/s
> raid6: int64x8 gen() 4164 MB/s
> raid6: int64x4 gen() 6005 MB/s
> raid6: int64x2 gen() 5781 MB/s
> raid6: int64x1 gen() 4119 MB/s
> raid6: using algorithm lasx gen() 25109 MB/s
> raid6: .... xor() 14439 MB/s, rmw enabled
Acked-by: Song Liu <song@kernel.org>
Signed-off-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
The relevant parameter is 'start' and not 'nextid'
Fixes: 460488c58c ("idr: Remove idr_alloc_ext")
Signed-off-by: Ariel Marcovitch <arielmarcovitch@gmail.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Adds a new line to the docstrings of functions wrapping __xa_alloc() and
__xa_alloc_cyclic(), informing about the necessity of flag XA_FLAGS_ALLOC
being set previously.
The documentation so far says that functions wrapping __xa_alloc() and
__xa_alloc_cyclic() are supposed to return either -ENOMEM or -EBUSY in
case of an error. If the xarray has been initialized without the flag
XA_FLAGS_ALLOC, however, they fail with a different, undocumented error
code.
As hinted at in Documentation/core-api/xarray.rst, wrappers around these
functions should only be invoked when the flag has been set. The
functions' documentation should reflect that as well.
Signed-off-by: Philipp Stanner <pstanner@redhat.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
If both filter_glob and filters are not NULL, and kunit_parse_glob_filter()
succeed, but kcalloc parsed_filters fails, the suite_glob and test_glob of
parsed kzalloc in kunit_parse_glob_filter() will be leaked.
As Rae suggested, assign -ENOMEM to *err to correctly free copy and goto
free_parsed_glob to free the suite/test_glob of parsed.
Fixes: 1c9fd080df ("kunit: fix uninitialized variables bug in attributes filtering")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Suggested-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Take the last kfree(parsed_filters) and add it to be the first. Take
the first kfree(copy) and add it to be the last. The Best practice is to
return these errors reversely.
And as David suggested, add several labels which target only the things
which actually have been allocated so far.
Fixes: 529534e8cb ("kunit: Add ability to filter attributes")
Fixes: abbf73816b ("kunit: fix possible memory leak in kunit_filter_suites()")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Suggested-by: David Gow <davidgow@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----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=D7ZU
-----END PGP SIGNATURE-----
Merge tag 'printk-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
Pull printk updates from Petr Mladek:
- Do not try to get the console lock when it is not need or useful in
panic()
- Replace the global console_suspended state by a per-console flag
- Export symbols needed for dumping the raw printk buffer in panic()
- Fix documentation of printf formats for integer types
- Moved Sergey Senozhatsky to the reviewer role
- Misc cleanups
* tag 'printk-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
printk: export symbols for debug modules
lib: test_scanf: Add explicit type cast to result initialization in test_number_prefix()
printk: ringbuffer: Fix truncating buffer size min_t cast
printk: Rename abandon_console_lock_in_panic() to other_cpu_in_panic()
printk: Add per-console suspended state
printk: Consolidate console deferred printing
printk: Do not take console lock for console_flush_on_panic()
printk: Keep non-panic-CPUs out of console lock
printk: Reduce console_unblank() usage in unsafe scenarios
kdb: Do not assume write() callback available
docs: printk-formats: Treat char as always unsigned
docs: printk-formats: Fix hex printing of signed values
MAINTAINERS: adjust printk/vsprintf entries
percpu
* A couple cleanups by Baoquan He and Bibo Mao. The only behavior change
is to start printing messages if we're under the warn limit for failed
atomic allocations.
percpu_counter
* Shakeel introduced percpu counters into mm_struct which caused percpu
allocations be on the hot path [1]. Originally I spent some time
trying to improve the percpu allocator, but instead preferred what
Mateusz Guzik proposed grouping at the allocation site,
percpu_counter_init_many(). This allows a single percpu allocation to
be shared by the counters. I like this approach because it creates a
shared lifetime by the allocations. Additionally, I believe many inits
have higher level synchronization requirements, like percpu_counter
does against HOTPLUG_CPU. Therefore we can group these optimizations
together.
[1] https://lore.kernel.org/linux-mm/20221024052841.3291983-1-shakeelb@google.com/
-----BEGIN PGP SIGNATURE-----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=vcA1
-----END PGP SIGNATURE-----
Merge tag 'percpu-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
Pull percpu updates from Dennis Zhou:
"One bigger change to percpu_counter's api allowing for init and
destroy of multiple counters via percpu_counter_init_many() and
percpu_counter_destroy_many(). This is used to help begin remediating
a performance regression with percpu rss stats.
Additionally, it seems larger core count machines are feeling the
burden of the single threaded allocation of percpu. Mateusz is
thinking about it and I will spend some time on it too.
percpu:
- A couple cleanups by Baoquan He and Bibo Mao. The only behavior
change is to start printing messages if we're under the warn limit
for failed atomic allocations.
percpu_counter:
- Shakeel introduced percpu counters into mm_struct which caused
percpu allocations be on the hot path [1]. Originally I spent some
time trying to improve the percpu allocator, but instead preferred
what Mateusz Guzik proposed grouping at the allocation site,
percpu_counter_init_many(). This allows a single percpu allocation
to be shared by the counters. I like this approach because it
creates a shared lifetime by the allocations. Additionally, I
believe many inits have higher level synchronization requirements,
like percpu_counter does against HOTPLUG_CPU. Therefore we can
group these optimizations together"
Link: https://lore.kernel.org/linux-mm/20221024052841.3291983-1-shakeelb@google.com/ [1]
* tag 'percpu-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
kernel/fork: group allocation/free of per-cpu counters for mm struct
pcpcntr: add group allocation/free
mm/percpu.c: print error message too if atomic alloc failed
mm/percpu.c: optimize the code in pcpu_setup_first_chunk() a little bit
mm/percpu.c: remove redundant check
mm/percpu: Remove some local variables in pcpu_populate_pte
Here is the big set of char/misc and other small driver subsystem
changes for 6.6-rc1.
Stuff all over the place here, lots of driver updates and changes and
new additions. Short summary is:
- new IIO drivers and updates
- Interconnect driver updates
- fpga driver updates and additions
- fsi driver updates
- mei driver updates
- coresight driver updates
- nvmem driver updates
- counter driver updates
- lots of smaller misc and char driver updates and additions
All of these have been in linux-next for a long time with no reported
problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCZPH64g8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ynr2QCfd3RKeR+WnGzyEOFhksl30UJJhiIAoNZtYT5+
t9KG0iMDXRuTsOqeEQbd
=tVnk
-----END PGP SIGNATURE-----
Merge tag 'char-misc-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here is the big set of char/misc and other small driver subsystem
changes for 6.6-rc1.
Stuff all over the place here, lots of driver updates and changes and
new additions. Short summary is:
- new IIO drivers and updates
- Interconnect driver updates
- fpga driver updates and additions
- fsi driver updates
- mei driver updates
- coresight driver updates
- nvmem driver updates
- counter driver updates
- lots of smaller misc and char driver updates and additions
All of these have been in linux-next for a long time with no reported
problems"
* tag 'char-misc-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (267 commits)
nvmem: core: Notify when a new layout is registered
nvmem: core: Do not open-code existing functions
nvmem: core: Return NULL when no nvmem layout is found
nvmem: core: Create all cells before adding the nvmem device
nvmem: u-boot-env:: Replace zero-length array with DECLARE_FLEX_ARRAY() helper
nvmem: sec-qfprom: Add Qualcomm secure QFPROM support
dt-bindings: nvmem: sec-qfprom: Add bindings for secure qfprom
dt-bindings: nvmem: Add compatible for QCM2290
nvmem: Kconfig: Fix typo "drive" -> "driver"
nvmem: Explicitly include correct DT includes
nvmem: add new NXP QorIQ eFuse driver
dt-bindings: nvmem: Add t1023-sfp efuse support
dt-bindings: nvmem: qfprom: Add compatible for MSM8226
nvmem: uniphier: Use devm_platform_get_and_ioremap_resource()
nvmem: qfprom: do some cleanup
nvmem: stm32-romem: Use devm_platform_get_and_ioremap_resource()
nvmem: rockchip-efuse: Use devm_platform_get_and_ioremap_resource()
nvmem: meson-mx-efuse: Convert to devm_platform_ioremap_resource()
nvmem: lpc18xx_otp: Convert to devm_platform_ioremap_resource()
nvmem: brcm_nvram: Use devm_platform_get_and_ioremap_resource()
...
Here is a small set of driver core updates and additions for 6.6-rc1.
Included in here are:
- stable kernel documentation updates
- class structure const work from Ivan on various subsystems
- kernfs tweaks
- driver core tests!
- kobject sanity cleanups
- kobject structure reordering to save space
- driver core error code handling fixups
- other minor driver core cleanups
All of these have been in linux-next for a while with no reported
problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCZPH77Q8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ylZMACePk8SitfaJc6FfFf5I7YK7Nq0V8MAn0nUjgsR
i8NcNpu/Yv4HGrDgTdh/
=PJbk
-----END PGP SIGNATURE-----
Merge tag 'driver-core-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is a small set of driver core updates and additions for 6.6-rc1.
Included in here are:
- stable kernel documentation updates
- class structure const work from Ivan on various subsystems
- kernfs tweaks
- driver core tests!
- kobject sanity cleanups
- kobject structure reordering to save space
- driver core error code handling fixups
- other minor driver core cleanups
All of these have been in linux-next for a while with no reported
problems"
* tag 'driver-core-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (32 commits)
driver core: Call in reversed order in device_platform_notify_remove()
driver core: Return proper error code when dev_set_name() fails
kobject: Remove redundant checks for whether ktype is NULL
kobject: Add sanity check for kset->kobj.ktype in kset_register()
drivers: base: test: Add missing MODULE_* macros to root device tests
drivers: base: test: Add missing MODULE_* macros for platform devices tests
drivers: base: Free devm resources when unregistering a device
drivers: base: Add basic devm tests for platform devices
drivers: base: Add basic devm tests for root devices
kernfs: fix missing kernfs_iattr_rwsem locking
docs: stable-kernel-rules: mention that regressions must be prevented
docs: stable-kernel-rules: fine-tune various details
docs: stable-kernel-rules: make the examples for option 1 a proper list
docs: stable-kernel-rules: move text around to improve flow
docs: stable-kernel-rules: improve structure by changing headlines
base/node: Remove duplicated include
kernfs: attach uuid for every kernfs and report it in fsid
kernfs: add stub helper for kernfs_generic_poll()
x86/resctrl: make pseudo_lock_class a static const structure
x86/MSR: make msr_class a static const structure
...
* Support for the new "riscv,isa-extensions" and "riscv,isa-base" device
tree interfaces for probing extensions.
* Support for userspace access to the performance counters.
* Support for more instructions in kprobes.
* Crash kernels can be allocated above 4GiB.
* Support for KCFI.
* Support for ELFs in !MMU configurations.
* ARCH_KMALLOC_MINALIGN has been reduced to 8.
* mmap() defaults to sv48-sized addresses, with longer addresses hidden
behind a hint (similar to Arm and Intel).
* Also various fixes and cleanups.
-----BEGIN PGP SIGNATURE-----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=/tXb
-----END PGP SIGNATURE-----
Merge tag 'riscv-for-linus-6.6-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Palmer Dabbelt:
- Support for the new "riscv,isa-extensions" and "riscv,isa-base"
device tree interfaces for probing extensions
- Support for userspace access to the performance counters
- Support for more instructions in kprobes
- Crash kernels can be allocated above 4GiB
- Support for KCFI
- Support for ELFs in !MMU configurations
- ARCH_KMALLOC_MINALIGN has been reduced to 8
- mmap() defaults to sv48-sized addresses, with longer addresses hidden
behind a hint (similar to Arm and Intel)
- Also various fixes and cleanups
* tag 'riscv-for-linus-6.6-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (51 commits)
lib/Kconfig.debug: Restrict DEBUG_INFO_SPLIT for RISC-V
riscv: support PREEMPT_DYNAMIC with static keys
riscv: Move create_tmp_mapping() to init sections
riscv: Mark KASAN tmp* page tables variables as static
riscv: mm: use bitmap_zero() API
riscv: enable DEBUG_FORCE_FUNCTION_ALIGN_64B
riscv: remove redundant mv instructions
RISC-V: mm: Document mmap changes
RISC-V: mm: Update pgtable comment documentation
RISC-V: mm: Add tests for RISC-V mm
RISC-V: mm: Restrict address space for sv39,sv48,sv57
riscv: enable DMA_BOUNCE_UNALIGNED_KMALLOC for !dma_coherent
riscv: allow kmalloc() caches aligned to the smallest value
riscv: support the elf-fdpic binfmt loader
binfmt_elf_fdpic: support 64-bit systems
riscv: Allow CONFIG_CFI_CLANG to be selected
riscv/purgatory: Disable CFI
riscv: Add CFI error handling
riscv: Add ftrace_stub_graph
riscv: Add types to indirectly called assembly functions
...
KUnit's attribute filtering feature needs the filter strings passed in
to be writable, as it modifies them in-place during parsing. This works
for the filters passed on the kernel command line, but the string
literals used in the executor tests are at least theoretically read-only
(though they work on x86_64 for some reason). s390 wasn't fooled, and
crashed when these tests were run.
Use a 'char[]' instead, (and make an explicit variable for the current
filter in parse_filter_attr_test), which will store the string in a
writable segment.
Fixes: 76066f93f1 ("kunit: add tests for filtering attributes")
Closes: https://lore.kernel.org/linux-kselftest/55950256-c00a-4d21-a2c0-cf9f0e5b8a9a@roeck-us.net/
Signed-off-by: David Gow <davidgow@google.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
When building for ARCH=riscv using LLVM < 14, there is an error with
CONFIG_DEBUG_INFO_SPLIT=y:
error: A dwo section may not contain relocations
This was worked around in LLVM 15 by disallowing '-gsplit-dwarf' with
'-mrelax' (the default), so CONFIG_DEBUG_INFO_SPLIT is not selectable
with newer versions of LLVM:
$ clang --target=riscv64-linux-gnu -gsplit-dwarf -c -o /dev/null -x c /dev/null
clang: error: -gsplit-dwarf is unsupported with RISC-V linker relaxation (-mrelax)
GCC silently had a similar issue that was resolved with GCC 12.x.
Restrict CONFIG_DEBUG_INFO_SPLIT for RISC-V when using LLVM or GCC <
12.x to avoid these known issues.
Link: https://github.com/ClangBuiltLinux/linux/issues/1914
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99090
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/all/202308090204.9yZffBWo-lkp@intel.com/
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Fangrui Song <maskray@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20230816-riscv-debug_info_split-v1-1-d1019d6ccc11@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Allow to force all function address 64B aligned as it is possible for
other architectures. This may be useful when verify if performance
bump is caused by function alignment changes.
Before commit 1bf18da621 ("lib/Kconfig.debug: add ARCH dependency
for FUNCTION_ALIGN option"), riscv supports enabling the
DEBUG_FORCE_FUNCTION_ALIGN_64B option, but after that commit, each
arch needs to claim the support explicitly.
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230727160356.3874-1-jszhang@kernel.org
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
changes to the clk framework this time around. That's probably because everyone
was on vacation (yours truly included). We did lose a couple clk drivers this
time around because nobody was using those devices. That skews the diffstat a
bit, but either way, nothing looks out of the ordinary here. The usual suspects
are chugging along adding support for more SoCs and fixing bugs.
If I had to choose, I'd say the theme for the past few months has been
"polish". There's quite a few patches that migrate to
devm_platform_ioremap_resource() in here. And there's more than a handful of
patches that move the NR_CLKS define from the DT binding header to the driver.
There's even patches that migrate drivers to use clk_parent_data and clk_hw to
describe clk tree topology. It seems that the spring (summer?) cleaning bug got
some folks, or the semiconductor shortage finally hit the software side.
New Drivers:
- StarFive JH7110 SoC clock drivers
- Qualcomm IPQ5018 Global Clock Controller driver
- Versa3 clk generator to support 48KHz playback/record with audio codec on
RZ/G2L SMARC EVK
Removed Drivers:
- Remove non-OF mmp clk drivers
- Remove OXNAS clk driver
Updates:
- Add __counted_by to struct clk_hw_onecell_data and struct spmi_pmic_div_clk_cc
- Move defines for numbers of clks (NR_CLKS) from DT headers to drivers
- Introduce kstrdup_and_replace() and use it
- Add PLL rates for Rockchip rk3568
- Add the display clock tree for Rockchip rv1126
- Add Audio Clock Generator (ADG) clocks on Renesas R-Car Gen3 and RZ/G2 SoCs
- Convert sun9i-mmc clock to use devm_platform_get_and_ioremap_resource()
- Fix function name in a comment in ccu_mmc_timing.c
- Parameter name correction for ccu_nkm_round_rate()
- Implement CLK_SET_RATE_PARENT for Allwinner NKM clocks, i.e. consider alternative
parent rates when determining clock rates
- Set CLK_SET_RATE_PARENT for Allwinner A64 pll-mipi
- Support finding closest (as opposed to closest but not higher) clock rate
for NM, NKM, mux and div type clocks, as use it for Allwinner A64 pll-video0
- Prefer current parent rate if able to generate ideal clock rate for Allwinner NKM clocks
- Clean up Qualcomm SMD RPM driver, with interconnect bus clocks moved out to
the interconnect drivers
- Fix various PM runtime bugs across many Qualcomm clk drivers
- Migrate Qualcomm MDM9615 is to parent_hw and parent_data
- Add network related resets on Qualcomm IPQ4019
- Add a couple missing USB related clocks to Qualcomm IPQ9574
- Add missing gpll0_sleep_clk_src to Qualcomm MSM8917 global clock controller
- In the Qualcomm QDU1000 global clock controller, GDSCs, clkrefs, and GPLL1 are
added, while PCIe pipe clock, SDCC rcg ops are corrected
- Add missing GDSCs to and correct GDSCs for the SC8280XP global clock controller driver
- Support retention for the Qualcomm SC8280XP display clock controller GDSCs.
- Qualcommm's SDCC apps_clk_src is marked with CLK_OPS_PARENT_ENABLE to fix
issues with missing parent clocks across sc7180, sm7150, sm6350 and sm8250,
while sm8450 is corrected to use floor ops
- Correct Qualcomm SM6350 GPU clock controller's clock supplies
- Drop unwanted clocks from the Qualcomm IPQ5332 GCC driver
- Add missing OXILICX GDSC to Qualcomm MSM8226 GCC
- Change the delay in the Qualcomm reset controller to fsleep() for correctness
- Extend the Qualcomm SM83550 Video clock controller to support SC8280XP
- Add graphics clock support on Renesas RZ/G2M, RZ/G2N, RZ/G2E, and R-Car H3,
M3-W, and M3-N SoCs
- Add Clocked Serial Interface (CSI) clocks on Renesas RZ/V2M
- Add PWM (MTU3) clock and reset on Renesas RZ/G2UL and RZ/Five
- Add the PDM IPC clock for i.MX93
- Add 519.75MHz frequency support for i.MX9 PLL
- Simplify the .determine_rate() implementation for i.MX GPR mux
- Make the i.MX8QXP LPCG clock use devm_platform_ioremap_resource()
- Add the audio mux clock to i.MX8
- Fix the SPLL2 MULT range for PLLv4
- Update the SPLL2 type in i.MX8ULP
- Fix the SAI4 clock on i.MX8MP
- Add silicon revision print for i.MX25 on clocks init
- Drop the return value from __mx25_clocks_init()
- Fix the clock pauses on no-op set_rate for i.MX8M composite clock
- Drop restrictions for i.MX PLL14xx and fix its max prediv value
- Drop the 393216000 and 361267200 from i.MX PLL14xx rate table to allow
glitch free switching
-----BEGIN PGP SIGNATURE-----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=h2Jz
-----END PGP SIGNATURE-----
Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk subsystem updates from Stephen Boyd:
"This pull request is full of clk driver changes. In fact, there aren't
any changes to the clk framework this time around. That's probably
because everyone was on vacation (yours truly included). We did lose a
couple clk drivers this time around because nobody was using those
devices. That skews the diffstat a bit, but either way, nothing looks
out of the ordinary here. The usual suspects are chugging along adding
support for more SoCs and fixing bugs.
If I had to choose, I'd say the theme for the past few months has been
"polish". There's quite a few patches that migrate to
devm_platform_ioremap_resource() in here. And there's more than a
handful of patches that move the NR_CLKS define from the DT binding
header to the driver. There's even patches that migrate drivers to use
clk_parent_data and clk_hw to describe clk tree topology. It seems
that the spring (summer?) cleaning bug got some folks, or the
semiconductor shortage finally hit the software side.
New Drivers:
- StarFive JH7110 SoC clock drivers
- Qualcomm IPQ5018 Global Clock Controller driver
- Versa3 clk generator to support 48KHz playback/record with audio
codec on RZ/G2L SMARC EVK
Removed Drivers:
- Remove non-OF mmp clk drivers
- Remove OXNAS clk driver
Updates:
- Add __counted_by to struct clk_hw_onecell_data and struct
spmi_pmic_div_clk_cc
- Move defines for numbers of clks (NR_CLKS) from DT headers to
drivers
- Introduce kstrdup_and_replace() and use it
- Add PLL rates for Rockchip rk3568
- Add the display clock tree for Rockchip rv1126
- Add Audio Clock Generator (ADG) clocks on Renesas R-Car Gen3 and
RZ/G2 SoCs
- Convert sun9i-mmc clock to use
devm_platform_get_and_ioremap_resource()
- Fix function name in a comment in ccu_mmc_timing.c
- Parameter name correction for ccu_nkm_round_rate()
- Implement CLK_SET_RATE_PARENT for Allwinner NKM clocks, i.e.
consider alternative parent rates when determining clock rates
- Set CLK_SET_RATE_PARENT for Allwinner A64 pll-mipi
- Support finding closest (as opposed to closest but not higher)
clock rate for NM, NKM, mux and div type clocks, as use it for
Allwinner A64 pll-video0
- Prefer current parent rate if able to generate ideal clock rate for
Allwinner NKM clocks
- Clean up Qualcomm SMD RPM driver, with interconnect bus clocks
moved out to the interconnect drivers
- Fix various PM runtime bugs across many Qualcomm clk drivers
- Migrate Qualcomm MDM9615 is to parent_hw and parent_data
- Add network related resets on Qualcomm IPQ4019
- Add a couple missing USB related clocks to Qualcomm IPQ9574
- Add missing gpll0_sleep_clk_src to Qualcomm MSM8917 global clock
controller
- In the Qualcomm QDU1000 global clock controller, GDSCs, clkrefs,
and GPLL1 are added, while PCIe pipe clock, SDCC rcg ops are
corrected
- Add missing GDSCs to and correct GDSCs for the SC8280XP global
clock controller driver
- Support retention for the Qualcomm SC8280XP display clock
controller GDSCs.
- Qualcommm's SDCC apps_clk_src is marked with CLK_OPS_PARENT_ENABLE
to fix issues with missing parent clocks across sc7180, sm7150,
sm6350 and sm8250, while sm8450 is corrected to use floor ops
- Correct Qualcomm SM6350 GPU clock controller's clock supplies
- Drop unwanted clocks from the Qualcomm IPQ5332 GCC driver
- Add missing OXILICX GDSC to Qualcomm MSM8226 GCC
- Change the delay in the Qualcomm reset controller to fsleep() for
correctness
- Extend the Qualcomm SM83550 Video clock controller to support
SC8280XP
- Add graphics clock support on Renesas RZ/G2M, RZ/G2N, RZ/G2E, and
R-Car H3, M3-W, and M3-N SoCs
- Add Clocked Serial Interface (CSI) clocks on Renesas RZ/V2M
- Add PWM (MTU3) clock and reset on Renesas RZ/G2UL and RZ/Five
- Add the PDM IPC clock for i.MX93
- Add 519.75MHz frequency support for i.MX9 PLL
- Simplify the .determine_rate() implementation for i.MX GPR mux
- Make the i.MX8QXP LPCG clock use devm_platform_ioremap_resource()
- Add the audio mux clock to i.MX8
- Fix the SPLL2 MULT range for PLLv4
- Update the SPLL2 type in i.MX8ULP
- Fix the SAI4 clock on i.MX8MP
- Add silicon revision print for i.MX25 on clocks init
- Drop the return value from __mx25_clocks_init()
- Fix the clock pauses on no-op set_rate for i.MX8M composite clock
- Drop restrictions for i.MX PLL14xx and fix its max prediv value
- Drop the 393216000 and 361267200 from i.MX PLL14xx rate table to
allow glitch free switching"
* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (207 commits)
clk: qcom: Fix SM_GPUCC_8450 dependencies
clk: lmk04832: Support using PLL1_LD as SPI readback pin
clk: lmk04832: Don't disable vco clock on probe fail
clk: lmk04832: Set missing parent_names for output clocks
clk: mvebu: Convert to devm_platform_ioremap_resource()
clk: nuvoton: Convert to devm_platform_ioremap_resource()
clk: socfpga: agilex: Convert to devm_platform_ioremap_resource()
clk: ti: Use devm_platform_get_and_ioremap_resource()
clk: mediatek: Convert to devm_platform_ioremap_resource()
clk: hsdk-pll: Convert to devm_platform_ioremap_resource()
clk: gemini: Convert to devm_platform_ioremap_resource()
clk: fsl-sai: Convert to devm_platform_ioremap_resource()
clk: bm1880: Convert to devm_platform_ioremap_resource()
clk: axm5516: Convert to devm_platform_ioremap_resource()
clk: actions: Convert to devm_platform_ioremap_resource()
clk: cdce925: Remove redundant of_match_ptr()
clk: pxa910: Move number of clocks to driver source
clk: pxa1928: Move number of clocks to driver source
clk: pxa168: Move number of clocks to driver source
clk: mmp2: Move number of clocks to driver source
...
These are the remaining few clean-ups of DT related includes which
didn't get applied to subsystem trees.
-----BEGIN PGP SIGNATURE-----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=eLMf
-----END PGP SIGNATURE-----
Merge tag 'devicetree-header-cleanups-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull devicetree include cleanups from Rob Herring:
"These are the remaining few clean-ups of DT related includes which
didn't get applied to subsystem trees"
* tag 'devicetree-header-cleanups-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
ipmi: Explicitly include correct DT includes
tpm: Explicitly include correct DT includes
lib/genalloc: Explicitly include correct DT includes
parport: Explicitly include correct DT includes
sbus: Explicitly include correct DT includes
mux: Explicitly include correct DT includes
macintosh: Explicitly include correct DT includes
hte: Explicitly include correct DT includes
EDAC: Explicitly include correct DT includes
clocksource: Explicitly include correct DT includes
sparc: Explicitly include correct DT includes
riscv: Explicitly include correct DT includes
We've received a fairly wide range of changes at this time, including
for ALSA and ASoC core, but all of them are rather small changes.
Here are some highlights:
ALSA / ASoC Core:
- Fixes of inconsistent locking around control API helpers
- A few new control API functions and cleanups
- Workarounds for potential UAFs by delayed kobj releases
- Unified PCM copy ops with iov_iter
- Continued efforts for ASoC API cleanups
ASoC:
- An adaptor to allow use of IIO DACs and ADCs in ASoC which pulls in
some IIO changes
- Create a library function for intlog10() and use it in the NAU8825
driver
- Convert drivers to use the more modern maple tree register cache
- Lots of work on the SOF framework, AMD and Intel drivers, including a
lot of cleanup and new device support
- Standardization of the presentation of jacks from drivers
- Provision of some generic sound card DT properties
- Support for AMD Van Gogh, AMD machines with MAX98388 and NAU8821,
AWInic AW88261, Cirrus Logic CS35L36 and CS42L43, various Intel
platforms including AVS machines with ES8336 and RT5663, Mediatek
MT7986, NXP i.MX93, RealTek RT1017 and StarFive JH7110
Others:
- New test coverage including ASoC and topology tests in KUnit;
this also involves enabling UML builds of ALSA since that's the
default KUnit test environment which pulls in the addition of some
stubs to the driver
- More enhancement of pcmtest driver
- A few fixes / enhancements of MIDI 2.0 UMP core
- Using PCI definitions in allover HD-audio code
- Support for Cirrus CS35L56 and TI TAS2781 HD-audio sub-codecs
- CS35L41 HD-audio sub-codec improvements
- Continued emu10k1 improvements
-----BEGIN PGP SIGNATURE-----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=Rr0i
-----END PGP SIGNATURE-----
Merge tag 'sound-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound updates from Takashi Iwai:
"We've received a fairly wide range of changes at this time, including
for ALSA and ASoC core, but all of them are rather small changes.
Here are some highlights:
ALSA / ASoC Core:
- Fixes of inconsistent locking around control API helpers
- A few new control API functions and cleanups
- Workarounds for potential UAFs by delayed kobj releases
- Unified PCM copy ops with iov_iter
- Continued efforts for ASoC API cleanups
ASoC:
- An adaptor to allow use of IIO DACs and ADCs in ASoC which pulls in
some IIO changes
- Create a library function for intlog10() and use it in the NAU8825
driver
- Convert drivers to use the more modern maple tree register cache
- Lots of work on the SOF framework, AMD and Intel drivers, including
a lot of cleanup and new device support
- Standardization of the presentation of jacks from drivers
- Provision of some generic sound card DT properties
- Support for AMD Van Gogh, AMD machines with MAX98388 and NAU8821,
AWInic AW88261, Cirrus Logic CS35L36 and CS42L43, various Intel
platforms including AVS machines with ES8336 and RT5663, Mediatek
MT7986, NXP i.MX93, RealTek RT1017 and StarFive JH7110
Others:
- New test coverage including ASoC and topology tests in KUnit; this
also involves enabling UML builds of ALSA since that's the default
KUnit test environment which pulls in the addition of some stubs to
the driver
- More enhancement of pcmtest driver
- A few fixes / enhancements of MIDI 2.0 UMP core
- Using PCI definitions in allover HD-audio code
- Support for Cirrus CS35L56 and TI TAS2781 HD-audio sub-codecs
- CS35L41 HD-audio sub-codec improvements
- Continued emu10k1 improvements"
* tag 'sound-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (693 commits)
ALSA: pcm: Fix missing fixup call in compat hw_refine ioctl
ASoC: dwc: i2s: Fix unused functions
ALSA: usb-audio: Don't try to submit URBs after disconnection
ALSA: emu10k1: add separate documentation for E-MU cards
ALSA: emu10k1: more documentation updates
ALSA: emu10k1: de-duplicate audigy-mixer.rst vs. sb-live-mixer.rst
ALSA: ump: Fix -Wformat-truncation warnings
ALSA: hda: Add missing dependency on CONFIG_EFI for Cirrus/TI sub-codecs
ALSA: doc: Fix missing backquote in midi-2.0.rst
ALSA: hda/realtek: Add quirk for mute LEDs on HP ENVY x360 15-eu0xxx
ALSA: hda/tas2781: Switch back to use struct i2c_driver's .probe()
ASoC: soc-core.c: Do not error if a DAI link component is not found
ASoC: codecs: Fix error code in aw88261_i2c_probe()
ASoC: audio-graph-card.c: move audio_graph_parse_of()
ASoC: cs42l43: Use new-style PM runtime macros
ALSA: documentation: Add description for USB MIDI 2.0 gadget driver
ALSA: ump: Don't create unused substreams for static blocks
ALSA: ump: Fill group names for legacy rawmidi substreams
ALSA: usb-audio: Attach legacy rawmidi after probing all UMP EPs
ALSA: ac97: Fix possible error value of *rac97
...
-----BEGIN PGP SIGNATURE-----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=p1bd
-----END PGP SIGNATURE-----
Merge tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux
Pull block updates from Jens Axboe:
"Pretty quiet round for this release. This contains:
- Add support for zoned storage to ublk (Andreas, Ming)
- Series improving performance for drivers that mark themselves as
needing a blocking context for issue (Bart)
- Cleanup the flush logic (Chengming)
- sed opal keyring support (Greg)
- Fixes and improvements to the integrity support (Jinyoung)
- Add some exports for bcachefs that we can hopefully delete again in
the future (Kent)
- deadline throttling fix (Zhiguo)
- Series allowing building the kernel without buffer_head support
(Christoph)
- Sanitize the bio page adding flow (Christoph)
- Write back cache fixes (Christoph)
- MD updates via Song:
- Fix perf regression for raid0 large sequential writes (Jan)
- Fix split bio iostat for raid0 (David)
- Various raid1 fixes (Heinz, Xueshi)
- raid6test build fixes (WANG)
- Deprecate bitmap file support (Christoph)
- Fix deadlock with md sync thread (Yu)
- Refactor md io accounting (Yu)
- Various non-urgent fixes (Li, Yu, Jack)
- Various fixes and cleanups (Arnd, Azeem, Chengming, Damien, Li,
Ming, Nitesh, Ruan, Tejun, Thomas, Xu)"
* tag 'for-6.6/block-2023-08-28' of git://git.kernel.dk/linux: (113 commits)
block: use strscpy() to instead of strncpy()
block: sed-opal: keyring support for SED keys
block: sed-opal: Implement IOC_OPAL_REVERT_LSP
block: sed-opal: Implement IOC_OPAL_DISCOVERY
blk-mq: prealloc tags when increase tagset nr_hw_queues
blk-mq: delete redundant tagset map update when fallback
blk-mq: fix tags leak when shrink nr_hw_queues
ublk: zoned: support REQ_OP_ZONE_RESET_ALL
md: raid0: account for split bio in iostat accounting
md/raid0: Fix performance regression for large sequential writes
md/raid0: Factor out helper for mapping and submitting a bio
md raid1: allow writebehind to work on any leg device set WriteMostly
md/raid1: hold the barrier until handle_read_error() finishes
md/raid1: free the r1bio before waiting for blocked rdev
md/raid1: call free_r1bio() before allow_barrier() in raid_end_bio_io()
blk-cgroup: Fix NULL deref caused by blkg_policy_data being installed before init
drivers/rnbd: restore sysfs interface to rnbd-client
md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()
raid6: test: only check for Altivec if building on powerpc hosts
raid6: test: make sure all intermediate and artifact files are .gitignored
...
("refactor Kconfig to consolidate KEXEC and CRASH options").
- kernel.h slimming work from Andy Shevchenko ("kernel.h: Split out a
couple of macros to args.h").
- gdb feature work from Kuan-Ying Lee ("Add GDB memory helper
commands").
- vsprintf inclusion rationalization from Andy Shevchenko
("lib/vsprintf: Rework header inclusions").
- Switch the handling of kdump from a udev scheme to in-kernel handling,
by Eric DeVolder ("crash: Kernel handling of CPU and memory hot
un/plug").
- Many singleton patches to various parts of the tree
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZO2GpAAKCRDdBJ7gKXxA
juW3AQD1moHzlSN6x9I3tjm5TWWNYFoFL8af7wXDJspp/DWH/AD/TO0XlWWhhbYy
QHy7lL0Syha38kKLMXTM+bN6YQHi9AU=
=WJQa
-----END PGP SIGNATURE-----
Merge tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull non-MM updates from Andrew Morton:
- An extensive rework of kexec and crash Kconfig from Eric DeVolder
("refactor Kconfig to consolidate KEXEC and CRASH options")
- kernel.h slimming work from Andy Shevchenko ("kernel.h: Split out a
couple of macros to args.h")
- gdb feature work from Kuan-Ying Lee ("Add GDB memory helper
commands")
- vsprintf inclusion rationalization from Andy Shevchenko
("lib/vsprintf: Rework header inclusions")
- Switch the handling of kdump from a udev scheme to in-kernel
handling, by Eric DeVolder ("crash: Kernel handling of CPU and memory
hot un/plug")
- Many singleton patches to various parts of the tree
* tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (81 commits)
document while_each_thread(), change first_tid() to use for_each_thread()
drivers/char/mem.c: shrink character device's devlist[] array
x86/crash: optimize CPU changes
crash: change crash_prepare_elf64_headers() to for_each_possible_cpu()
crash: hotplug support for kexec_load()
x86/crash: add x86 crash hotplug support
crash: memory and CPU hotplug sysfs attributes
kexec: exclude elfcorehdr from the segment digest
crash: add generic infrastructure for crash hotplug support
crash: move a few code bits to setup support of crash hotplug
kstrtox: consistently use _tolower()
kill do_each_thread()
nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse
scripts/bloat-o-meter: count weak symbol sizes
treewide: drop CONFIG_EMBEDDED
lockdep: fix static memory detection even more
lib/vsprintf: declare no_hash_pointers in sprintf.h
lib/vsprintf: split out sprintf() and friends
kernel/fork: stop playing lockless games for exe_file replacement
adfs: delete unused "union adfs_dirtail" definition
...
- Peter Xu has a series (mm/gup: Unify hugetlb, speed up thp") which
reduces the special-case code for handling hugetlb pages in GUP. It
also speeds up GUP handling of transparent hugepages.
- Peng Zhang provides some maple tree speedups ("Optimize the fast path
of mas_store()").
- Sergey Senozhatsky has improved te performance of zsmalloc during
compaction (zsmalloc: small compaction improvements").
- Domenico Cerasuolo has developed additional selftest code for zswap
("selftests: cgroup: add zswap test program").
- xu xin has doe some work on KSM's handling of zero pages. These
changes are mainly to enable the user to better understand the
effectiveness of KSM's treatment of zero pages ("ksm: support tracking
KSM-placed zero-pages").
- Jeff Xu has fixes the behaviour of memfd's
MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED sysctl ("mm/memfd: fix sysctl
MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED").
- David Howells has fixed an fscache optimization ("mm, netfs, fscache:
Stop read optimisation when folio removed from pagecache").
- Axel Rasmussen has given userfaultfd the ability to simulate memory
poisoning ("add UFFDIO_POISON to simulate memory poisoning with UFFD").
- Miaohe Lin has contributed some routine maintenance work on the
memory-failure code ("mm: memory-failure: remove unneeded PageHuge()
check").
- Peng Zhang has contributed some maintenance work on the maple tree
code ("Improve the validation for maple tree and some cleanup").
- Hugh Dickins has optimized the collapsing of shmem or file pages into
THPs ("mm: free retracted page table by RCU").
- Jiaqi Yan has a patch series which permits us to use the healthy
subpages within a hardware poisoned huge page for general purposes
("Improve hugetlbfs read on HWPOISON hugepages").
- Kemeng Shi has done some maintenance work on the pagetable-check code
("Remove unused parameters in page_table_check").
- More folioification work from Matthew Wilcox ("More filesystem folio
conversions for 6.6"), ("Followup folio conversions for zswap"). And
from ZhangPeng ("Convert several functions in page_io.c to use a
folio").
- page_ext cleanups from Kemeng Shi ("minor cleanups for page_ext").
- Baoquan He has converted some architectures to use the GENERIC_IOREMAP
ioremap()/iounmap() code ("mm: ioremap: Convert architectures to take
GENERIC_IOREMAP way").
- Anshuman Khandual has optimized arm64 tlb shootdown ("arm64: support
batched/deferred tlb shootdown during page reclamation/migration").
- Better maple tree lockdep checking from Liam Howlett ("More strict
maple tree lockdep"). Liam also developed some efficiency improvements
("Reduce preallocations for maple tree").
- Cleanup and optimization to the secondary IOMMU TLB invalidation, from
Alistair Popple ("Invalidate secondary IOMMU TLB on permission
upgrade").
- Ryan Roberts fixes some arm64 MM selftest issues ("selftests/mm fixes
for arm64").
- Kemeng Shi provides some maintenance work on the compaction code ("Two
minor cleanups for compaction").
- Some reduction in mmap_lock pressure from Matthew Wilcox ("Handle most
file-backed faults under the VMA lock").
- Aneesh Kumar contributes code to use the vmemmap optimization for DAX
on ppc64, under some circumstances ("Add support for DAX vmemmap
optimization for ppc64").
- page-ext cleanups from Kemeng Shi ("add page_ext_data to get client
data in page_ext"), ("minor cleanups to page_ext header").
- Some zswap cleanups from Johannes Weiner ("mm: zswap: three
cleanups").
- kmsan cleanups from ZhangPeng ("minor cleanups for kmsan").
- VMA handling cleanups from Kefeng Wang ("mm: convert to
vma_is_initial_heap/stack()").
- DAMON feature work from SeongJae Park ("mm/damon/sysfs-schemes:
implement DAMOS tried total bytes file"), ("Extend DAMOS filters for
address ranges and DAMON monitoring targets").
- Compaction work from Kemeng Shi ("Fixes and cleanups to compaction").
- Liam Howlett has improved the maple tree node replacement code
("maple_tree: Change replacement strategy").
- ZhangPeng has a general code cleanup - use the K() macro more widely
("cleanup with helper macro K()").
- Aneesh Kumar brings memmap-on-memory to ppc64 ("Add support for memmap
on memory feature on ppc64").
- pagealloc cleanups from Kemeng Shi ("Two minor cleanups for pcp list
in page_alloc"), ("Two minor cleanups for get pageblock migratetype").
- Vishal Moola introduces a memory descriptor for page table tracking,
"struct ptdesc" ("Split ptdesc from struct page").
- memfd selftest maintenance work from Aleksa Sarai ("memfd: cleanups
for vm.memfd_noexec").
- MM include file rationalization from Hugh Dickins ("arch: include
asm/cacheflush.h in asm/hugetlb.h").
- THP debug output fixes from Hugh Dickins ("mm,thp: fix sloppy text
output").
- kmemleak improvements from Xiaolei Wang ("mm/kmemleak: use
object_cache instead of kmemleak_initialized").
- More folio-related cleanups from Matthew Wilcox ("Remove _folio_dtor
and _folio_order").
- A VMA locking scalability improvement from Suren Baghdasaryan
("Per-VMA lock support for swap and userfaults").
- pagetable handling cleanups from Matthew Wilcox ("New page table range
API").
- A batch of swap/thp cleanups from David Hildenbrand ("mm/swap: stop
using page->private on tail pages for THP_SWAP + cleanups").
- Cleanups and speedups to the hugetlb fault handling from Matthew
Wilcox ("Change calling convention for ->huge_fault").
- Matthew Wilcox has also done some maintenance work on the MM subsystem
documentation ("Improve mm documentation").
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZO1JUQAKCRDdBJ7gKXxA
jrMwAP47r/fS8vAVT3zp/7fXmxaJYTK27CTAM881Gw1SDhFM/wEAv8o84mDenCg6
Nfio7afS1ncD+hPYT8947UnLxTgn+ww=
=Afws
-----END PGP SIGNATURE-----
Merge tag 'mm-stable-2023-08-28-18-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- Some swap cleanups from Ma Wupeng ("fix WARN_ON in
add_to_avail_list")
- Peter Xu has a series (mm/gup: Unify hugetlb, speed up thp") which
reduces the special-case code for handling hugetlb pages in GUP. It
also speeds up GUP handling of transparent hugepages.
- Peng Zhang provides some maple tree speedups ("Optimize the fast path
of mas_store()").
- Sergey Senozhatsky has improved te performance of zsmalloc during
compaction (zsmalloc: small compaction improvements").
- Domenico Cerasuolo has developed additional selftest code for zswap
("selftests: cgroup: add zswap test program").
- xu xin has doe some work on KSM's handling of zero pages. These
changes are mainly to enable the user to better understand the
effectiveness of KSM's treatment of zero pages ("ksm: support
tracking KSM-placed zero-pages").
- Jeff Xu has fixes the behaviour of memfd's
MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED sysctl ("mm/memfd: fix sysctl
MEMFD_NOEXEC_SCOPE_NOEXEC_ENFORCED").
- David Howells has fixed an fscache optimization ("mm, netfs, fscache:
Stop read optimisation when folio removed from pagecache").
- Axel Rasmussen has given userfaultfd the ability to simulate memory
poisoning ("add UFFDIO_POISON to simulate memory poisoning with
UFFD").
- Miaohe Lin has contributed some routine maintenance work on the
memory-failure code ("mm: memory-failure: remove unneeded PageHuge()
check").
- Peng Zhang has contributed some maintenance work on the maple tree
code ("Improve the validation for maple tree and some cleanup").
- Hugh Dickins has optimized the collapsing of shmem or file pages into
THPs ("mm: free retracted page table by RCU").
- Jiaqi Yan has a patch series which permits us to use the healthy
subpages within a hardware poisoned huge page for general purposes
("Improve hugetlbfs read on HWPOISON hugepages").
- Kemeng Shi has done some maintenance work on the pagetable-check code
("Remove unused parameters in page_table_check").
- More folioification work from Matthew Wilcox ("More filesystem folio
conversions for 6.6"), ("Followup folio conversions for zswap"). And
from ZhangPeng ("Convert several functions in page_io.c to use a
folio").
- page_ext cleanups from Kemeng Shi ("minor cleanups for page_ext").
- Baoquan He has converted some architectures to use the
GENERIC_IOREMAP ioremap()/iounmap() code ("mm: ioremap: Convert
architectures to take GENERIC_IOREMAP way").
- Anshuman Khandual has optimized arm64 tlb shootdown ("arm64: support
batched/deferred tlb shootdown during page reclamation/migration").
- Better maple tree lockdep checking from Liam Howlett ("More strict
maple tree lockdep"). Liam also developed some efficiency
improvements ("Reduce preallocations for maple tree").
- Cleanup and optimization to the secondary IOMMU TLB invalidation,
from Alistair Popple ("Invalidate secondary IOMMU TLB on permission
upgrade").
- Ryan Roberts fixes some arm64 MM selftest issues ("selftests/mm fixes
for arm64").
- Kemeng Shi provides some maintenance work on the compaction code
("Two minor cleanups for compaction").
- Some reduction in mmap_lock pressure from Matthew Wilcox ("Handle
most file-backed faults under the VMA lock").
- Aneesh Kumar contributes code to use the vmemmap optimization for DAX
on ppc64, under some circumstances ("Add support for DAX vmemmap
optimization for ppc64").
- page-ext cleanups from Kemeng Shi ("add page_ext_data to get client
data in page_ext"), ("minor cleanups to page_ext header").
- Some zswap cleanups from Johannes Weiner ("mm: zswap: three
cleanups").
- kmsan cleanups from ZhangPeng ("minor cleanups for kmsan").
- VMA handling cleanups from Kefeng Wang ("mm: convert to
vma_is_initial_heap/stack()").
- DAMON feature work from SeongJae Park ("mm/damon/sysfs-schemes:
implement DAMOS tried total bytes file"), ("Extend DAMOS filters for
address ranges and DAMON monitoring targets").
- Compaction work from Kemeng Shi ("Fixes and cleanups to compaction").
- Liam Howlett has improved the maple tree node replacement code
("maple_tree: Change replacement strategy").
- ZhangPeng has a general code cleanup - use the K() macro more widely
("cleanup with helper macro K()").
- Aneesh Kumar brings memmap-on-memory to ppc64 ("Add support for
memmap on memory feature on ppc64").
- pagealloc cleanups from Kemeng Shi ("Two minor cleanups for pcp list
in page_alloc"), ("Two minor cleanups for get pageblock
migratetype").
- Vishal Moola introduces a memory descriptor for page table tracking,
"struct ptdesc" ("Split ptdesc from struct page").
- memfd selftest maintenance work from Aleksa Sarai ("memfd: cleanups
for vm.memfd_noexec").
- MM include file rationalization from Hugh Dickins ("arch: include
asm/cacheflush.h in asm/hugetlb.h").
- THP debug output fixes from Hugh Dickins ("mm,thp: fix sloppy text
output").
- kmemleak improvements from Xiaolei Wang ("mm/kmemleak: use
object_cache instead of kmemleak_initialized").
- More folio-related cleanups from Matthew Wilcox ("Remove _folio_dtor
and _folio_order").
- A VMA locking scalability improvement from Suren Baghdasaryan
("Per-VMA lock support for swap and userfaults").
- pagetable handling cleanups from Matthew Wilcox ("New page table
range API").
- A batch of swap/thp cleanups from David Hildenbrand ("mm/swap: stop
using page->private on tail pages for THP_SWAP + cleanups").
- Cleanups and speedups to the hugetlb fault handling from Matthew
Wilcox ("Change calling convention for ->huge_fault").
- Matthew Wilcox has also done some maintenance work on the MM
subsystem documentation ("Improve mm documentation").
* tag 'mm-stable-2023-08-28-18-26' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (489 commits)
maple_tree: shrink struct maple_tree
maple_tree: clean up mas_wr_append()
secretmem: convert page_is_secretmem() to folio_is_secretmem()
nios2: fix flush_dcache_page() for usage from irq context
hugetlb: add documentation for vma_kernel_pagesize()
mm: add orphaned kernel-doc to the rst files.
mm: fix clean_record_shared_mapping_range kernel-doc
mm: fix get_mctgt_type() kernel-doc
mm: fix kernel-doc warning from tlb_flush_rmaps()
mm: remove enum page_entry_size
mm: allow ->huge_fault() to be called without the mmap_lock held
mm: move PMD_ORDER to pgtable.h
mm: remove checks for pte_index
memcg: remove duplication detection for mem_cgroup_uncharge_swap
mm/huge_memory: work on folio->swap instead of page->private when splitting folio
mm/swap: inline folio_set_swap_entry() and folio_swap_entry()
mm/swap: use dedicated entry for swap in folio
mm/swap: stop using page->private on tail pages for THP_SWAP
selftests/mm: fix WARNING comparing pointer to 0
selftests: cgroup: fix test_kmem_memcg_deletion kernel mem check
...
Core
----
- Increase size limits for to-be-sent skb frag allocations. This
allows tun, tap devices and packet sockets to better cope with large
writes operations.
- Store netdevs in an xarray, to simplify iterating over netdevs.
- Refactor nexthop selection for multipath routes.
- Improve sched class lifetime handling.
- Add backup nexthop ID support for bridge.
- Implement drop reasons support in openvswitch.
- Several data races annotations and fixes.
- Constify the sk parameter of routing functions.
- Prepend kernel version to netconsole message.
Protocols
---------
- Implement support for TCP probing the peer being under memory
pressure.
- Remove hard coded limitation on IPv6 specific info placement
inside the socket struct.
- Get rid of sysctl_tcp_adv_win_scale and use an auto-estimated
per socket scaling factor.
- Scaling-up the IPv6 expired route GC via a separated list of
expiring routes.
- In-kernel support for the TLS alert protocol.
- Better support for UDP reuseport with connected sockets.
- Add NEXT-C-SID support for SRv6 End.X behavior, reducing the SR
header size.
- Get rid of additional ancillary per MPTCP connection struct socket.
- Implement support for BPF-based MPTCP packet schedulers.
- Format MPTCP subtests selftests results in TAP.
- Several new SMC 2.1 features including unique experimental options,
max connections per lgr negotiation, max links per lgr negotiation.
BPF
---
- Multi-buffer support in AF_XDP.
- Add multi uprobe BPF links for attaching multiple uprobes
and usdt probes, which is significantly faster and saves extra fds.
- Implement an fd-based tc BPF attach API (TCX) and BPF link support on
top of it.
- Add SO_REUSEPORT support for TC bpf_sk_assign.
- Support new instructions from cpu v4 to simplify the generated code and
feature completeness, for x86, arm64, riscv64.
- Support defragmenting IPv(4|6) packets in BPF.
- Teach verifier actual bounds of bpf_get_smp_processor_id()
and fix perf+libbpf issue related to custom section handling.
- Introduce bpf map element count and enable it for all program types.
- Add a BPF hook in sys_socket() to change the protocol ID
from IPPROTO_TCP to IPPROTO_MPTCP to cover migration for legacy.
- Introduce bpf_me_mcache_free_rcu() and fix OOM under stress.
- Add uprobe support for the bpf_get_func_ip helper.
- Check skb ownership against full socket.
- Support for up to 12 arguments in BPF trampoline.
- Extend link_info for kprobe_multi and perf_event links.
Netfilter
---------
- Speed-up process exit by aborting ruleset validation if a
fatal signal is pending.
- Allow NLA_POLICY_MASK to be used with BE16/BE32 types.
Driver API
----------
- Page pool optimizations, to improve data locality and cache usage.
- Introduce ndo_hwtstamp_get() and ndo_hwtstamp_set() to avoid the need
for raw ioctl() handling in drivers.
- Simplify genetlink dump operations (doit/dumpit) providing them
the common information already populated in struct genl_info.
- Extend and use the yaml devlink specs to [re]generate the split ops.
- Introduce devlink selective dumps, to allow SF filtering SF based on
handle and other attributes.
- Add yaml netlink spec for netlink-raw families, allow route, link and
address related queries via the ynl tool.
- Remove phylink legacy mode support.
- Support offload LED blinking to phy.
- Add devlink port function attributes for IPsec.
New hardware / drivers
----------------------
- Ethernet:
- Broadcom ASP 2.0 (72165) ethernet controller
- MediaTek MT7988 SoC
- Texas Instruments AM654 SoC
- Texas Instruments IEP driver
- Atheros qca8081 phy
- Marvell 88Q2110 phy
- NXP TJA1120 phy
- WiFi:
- MediaTek mt7981 support
- Can:
- Kvaser SmartFusion2 PCI Express devices
- Allwinner T113 controllers
- Texas Instruments tcan4552/4553 chips
- Bluetooth:
- Intel Gale Peak
- Qualcomm WCN3988 and WCN7850
- NXP AW693 and IW624
- Mediatek MT2925
Drivers
-------
- Ethernet NICs:
- nVidia/Mellanox:
- mlx5:
- support UDP encapsulation in packet offload mode
- IPsec packet offload support in eswitch mode
- improve aRFS observability by adding new set of counters
- extends MACsec offload support to cover RoCE traffic
- dynamic completion EQs
- mlx4:
- convert to use auxiliary bus instead of custom interface logic
- Intel
- ice:
- implement switchdev bridge offload, even for LAG interfaces
- implement SRIOV support for LAG interfaces
- igc:
- add support for multiple in-flight TX timestamps
- Broadcom:
- bnxt:
- use the unified RX page pool buffers for XDP and non-XDP
- use the NAPI skb allocation cache
- OcteonTX2:
- support Round Robin scheduling HTB offload
- TC flower offload support for SPI field
- Freescale:
- add XDP_TX feature support
- AMD:
- ionic: add support for PCI FLR event
- sfc:
- basic conntrack offload
- introduce eth, ipv4 and ipv6 pedit offloads
- ST Microelectronics:
- stmmac: maximze PTP timestamping resolution
- Virtual NICs:
- Microsoft vNIC:
- batch ringing RX queue doorbell on receiving packets
- add page pool for RX buffers
- Virtio vNIC:
- add per queue interrupt coalescing support
- Google vNIC:
- add queue-page-list mode support
- Ethernet high-speed switches:
- nVidia/Mellanox (mlxsw):
- add port range matching tc-flower offload
- permit enslavement to netdevices with uppers
- Ethernet embedded switches:
- Marvell (mv88e6xxx):
- convert to phylink_pcs
- Renesas:
- r8A779fx: add speed change support
- rzn1: enables vlan support
- Ethernet PHYs:
- convert mv88e6xxx to phylink_pcs
- WiFi:
- Qualcomm Wi-Fi 7 (ath12k):
- extremely High Throughput (EHT) PHY support
- RealTek (rtl8xxxu):
- enable AP mode for: RTL8192FU, RTL8710BU (RTL8188GU),
RTL8192EU and RTL8723BU
- RealTek (rtw89):
- Introduce Time Averaged SAR (TAS) support
- Connector:
- support for event filtering
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
-----BEGIN PGP SIGNATURE-----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=9CsR
-----END PGP SIGNATURE-----
Merge tag 'net-next-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Paolo Abeni:
"Core:
- Increase size limits for to-be-sent skb frag allocations. This
allows tun, tap devices and packet sockets to better cope with
large writes operations
- Store netdevs in an xarray, to simplify iterating over netdevs
- Refactor nexthop selection for multipath routes
- Improve sched class lifetime handling
- Add backup nexthop ID support for bridge
- Implement drop reasons support in openvswitch
- Several data races annotations and fixes
- Constify the sk parameter of routing functions
- Prepend kernel version to netconsole message
Protocols:
- Implement support for TCP probing the peer being under memory
pressure
- Remove hard coded limitation on IPv6 specific info placement inside
the socket struct
- Get rid of sysctl_tcp_adv_win_scale and use an auto-estimated per
socket scaling factor
- Scaling-up the IPv6 expired route GC via a separated list of
expiring routes
- In-kernel support for the TLS alert protocol
- Better support for UDP reuseport with connected sockets
- Add NEXT-C-SID support for SRv6 End.X behavior, reducing the SR
header size
- Get rid of additional ancillary per MPTCP connection struct socket
- Implement support for BPF-based MPTCP packet schedulers
- Format MPTCP subtests selftests results in TAP
- Several new SMC 2.1 features including unique experimental options,
max connections per lgr negotiation, max links per lgr negotiation
BPF:
- Multi-buffer support in AF_XDP
- Add multi uprobe BPF links for attaching multiple uprobes and usdt
probes, which is significantly faster and saves extra fds
- Implement an fd-based tc BPF attach API (TCX) and BPF link support
on top of it
- Add SO_REUSEPORT support for TC bpf_sk_assign
- Support new instructions from cpu v4 to simplify the generated code
and feature completeness, for x86, arm64, riscv64
- Support defragmenting IPv(4|6) packets in BPF
- Teach verifier actual bounds of bpf_get_smp_processor_id() and fix
perf+libbpf issue related to custom section handling
- Introduce bpf map element count and enable it for all program types
- Add a BPF hook in sys_socket() to change the protocol ID from
IPPROTO_TCP to IPPROTO_MPTCP to cover migration for legacy
- Introduce bpf_me_mcache_free_rcu() and fix OOM under stress
- Add uprobe support for the bpf_get_func_ip helper
- Check skb ownership against full socket
- Support for up to 12 arguments in BPF trampoline
- Extend link_info for kprobe_multi and perf_event links
Netfilter:
- Speed-up process exit by aborting ruleset validation if a fatal
signal is pending
- Allow NLA_POLICY_MASK to be used with BE16/BE32 types
Driver API:
- Page pool optimizations, to improve data locality and cache usage
- Introduce ndo_hwtstamp_get() and ndo_hwtstamp_set() to avoid the
need for raw ioctl() handling in drivers
- Simplify genetlink dump operations (doit/dumpit) providing them the
common information already populated in struct genl_info
- Extend and use the yaml devlink specs to [re]generate the split ops
- Introduce devlink selective dumps, to allow SF filtering SF based
on handle and other attributes
- Add yaml netlink spec for netlink-raw families, allow route, link
and address related queries via the ynl tool
- Remove phylink legacy mode support
- Support offload LED blinking to phy
- Add devlink port function attributes for IPsec
New hardware / drivers:
- Ethernet:
- Broadcom ASP 2.0 (72165) ethernet controller
- MediaTek MT7988 SoC
- Texas Instruments AM654 SoC
- Texas Instruments IEP driver
- Atheros qca8081 phy
- Marvell 88Q2110 phy
- NXP TJA1120 phy
- WiFi:
- MediaTek mt7981 support
- Can:
- Kvaser SmartFusion2 PCI Express devices
- Allwinner T113 controllers
- Texas Instruments tcan4552/4553 chips
- Bluetooth:
- Intel Gale Peak
- Qualcomm WCN3988 and WCN7850
- NXP AW693 and IW624
- Mediatek MT2925
Drivers:
- Ethernet NICs:
- nVidia/Mellanox:
- mlx5:
- support UDP encapsulation in packet offload mode
- IPsec packet offload support in eswitch mode
- improve aRFS observability by adding new set of counters
- extends MACsec offload support to cover RoCE traffic
- dynamic completion EQs
- mlx4:
- convert to use auxiliary bus instead of custom interface
logic
- Intel
- ice:
- implement switchdev bridge offload, even for LAG
interfaces
- implement SRIOV support for LAG interfaces
- igc:
- add support for multiple in-flight TX timestamps
- Broadcom:
- bnxt:
- use the unified RX page pool buffers for XDP and non-XDP
- use the NAPI skb allocation cache
- OcteonTX2:
- support Round Robin scheduling HTB offload
- TC flower offload support for SPI field
- Freescale:
- add XDP_TX feature support
- AMD:
- ionic: add support for PCI FLR event
- sfc:
- basic conntrack offload
- introduce eth, ipv4 and ipv6 pedit offloads
- ST Microelectronics:
- stmmac: maximze PTP timestamping resolution
- Virtual NICs:
- Microsoft vNIC:
- batch ringing RX queue doorbell on receiving packets
- add page pool for RX buffers
- Virtio vNIC:
- add per queue interrupt coalescing support
- Google vNIC:
- add queue-page-list mode support
- Ethernet high-speed switches:
- nVidia/Mellanox (mlxsw):
- add port range matching tc-flower offload
- permit enslavement to netdevices with uppers
- Ethernet embedded switches:
- Marvell (mv88e6xxx):
- convert to phylink_pcs
- Renesas:
- r8A779fx: add speed change support
- rzn1: enables vlan support
- Ethernet PHYs:
- convert mv88e6xxx to phylink_pcs
- WiFi:
- Qualcomm Wi-Fi 7 (ath12k):
- extremely High Throughput (EHT) PHY support
- RealTek (rtl8xxxu):
- enable AP mode for: RTL8192FU, RTL8710BU (RTL8188GU),
RTL8192EU and RTL8723BU
- RealTek (rtw89):
- Introduce Time Averaged SAR (TAS) support
- Connector:
- support for event filtering"
* tag 'net-next-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1806 commits)
net: ethernet: mtk_wed: minor change in wed_{tx,rx}info_show
net: ethernet: mtk_wed: add some more info in wed_txinfo_show handler
net: stmmac: clarify difference between "interface" and "phy_interface"
r8152: add vendor/device ID pair for D-Link DUB-E250
devlink: move devlink_notify_register/unregister() to dev.c
devlink: move small_ops definition into netlink.c
devlink: move tracepoint definitions into core.c
devlink: push linecard related code into separate file
devlink: push rate related code into separate file
devlink: push trap related code into separate file
devlink: use tracepoint_enabled() helper
devlink: push region related code into separate file
devlink: push param related code into separate file
devlink: push resource related code into separate file
devlink: push dpipe related code into separate file
devlink: move and rename devlink_dpipe_send_and_alloc_skb() helper
devlink: push shared buffer related code into separate file
devlink: push port related code into separate file
devlink: push object register/unregister notifications into separate helpers
inet: fix IP_TRANSPARENT error handling
...
API:
- Move crypto engine callback from tfm ctx into algorithm object.
- Fix atomic sleep bug in crypto_destroy_instance.
- Move lib/mpi into lib/crypto.
Algorithms:
- Add chacha20 and poly1305 implementation for powerpc p10.
Drivers:
- Add AES skcipher and aead support to starfive.
- Add Dynamic Boost Control support to ccp.
- Add support for STM32P13 platform to stm32.
-----BEGIN PGP SIGNATURE-----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=LbcA
-----END PGP SIGNATURE-----
Merge tag 'v6.6-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
"API:
- Move crypto engine callback from tfm ctx into algorithm object
- Fix atomic sleep bug in crypto_destroy_instance
- Move lib/mpi into lib/crypto
Algorithms:
- Add chacha20 and poly1305 implementation for powerpc p10
Drivers:
- Add AES skcipher and aead support to starfive
- Add Dynamic Boost Control support to ccp
- Add support for STM32P13 platform to stm32"
* tag 'v6.6-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (149 commits)
Revert "dt-bindings: crypto: qcom,prng: Add SM8450"
crypto: chelsio - Remove unused declarations
X.509: if signature is unsupported skip validation
crypto: qat - fix crypto capability detection for 4xxx
crypto: drivers - Explicitly include correct DT includes
crypto: engine - Remove crypto_engine_ctx
crypto: zynqmp - Use new crypto_engine_op interface
crypto: virtio - Use new crypto_engine_op interface
crypto: stm32 - Use new crypto_engine_op interface
crypto: jh7110 - Use new crypto_engine_op interface
crypto: rk3288 - Use new crypto_engine_op interface
crypto: omap - Use new crypto_engine_op interface
crypto: keembay - Use new crypto_engine_op interface
crypto: sl3516 - Use new crypto_engine_op interface
crypto: caam - Use new crypto_engine_op interface
crypto: aspeed - Remove non-standard sha512 algorithms
crypto: aspeed - Use new crypto_engine_op interface
crypto: amlogic - Use new crypto_engine_op interface
crypto: sun8i-ss - Use new crypto_engine_op interface
crypto: sun8i-ce - Use new crypto_engine_op interface
...
This kunit update for Linux 6.6.rc1 consists of:
-- Adds support for running Rust documentation tests as KUnit tests
-- Makes init, str, sync, types doctests compilable/testable
-- Adds support for attributes API which include speed, modules
attributes, ability to filter and report attributes.
-- Adds support for marking tests slow using attributes API.
-- Adds attributes API documentation
-- Fixes to wild-memory-access bug in kunit_filter_suites() and
a possible memory leak in kunit_filter_suites()
-- Adds support for counting number of test suites in a module, list
action to kunit test modules, and test filtering on module tests.
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEPZKym/RZuOCGeA/kCwJExA0NQxwFAmTsxL8ACgkQCwJExA0N
Qxwt6BAA5FgF7nUeGRZCnot4MQCNGRThxsns2k3CKjM1Iokp8tstTDoNHXzk2veS
WlRYOHFQqQOVTVRP+laXyjjMMHnlnhFxqbv93UKsen4JIUJDLFLq9x+0i+0bZh97
N1rE5cKUnqjAOL6MIJuomW9IzEIrbMcqdljm6SOCZp90NLvq1+I4pDGLgx2bxcow
Y/7dkx+dnlEsoACZ19CL1L2TaR21GpKdpOudpHNCShsbE0aOAlyHAVcmH64FTqCy
Z1LtrA0odS71q0yxDVCk5X3cIkeVfGBMz6aMZBRzS9k5jU4H1EN1eG1rGdGErIe5
YduwX3KMikYJB2stT64T1vgldIpT/emxqkBigmxQ37g3Flgopz4bI1snMBry+nKb
ViD/WQNjsf2iL8MooCgYBzH7yjmX6lXXQTZXROogBj4lP2/0gHiQVZyXZEAjtoO3
uNzUbfHQGnvtTphBHV4nNGaO+7kU9Y/oX8TYFcSYJQzcH5UVx16uBwevZjT1bii/
q89bRAQLnJpzkR93SGpnmsRgoDcYJSYsEA1o/f9Eqq8j3guOS2idpJvkheXq8+A2
MqTSOCJHENKZ3v0UGKlvZUPStaMaqN58z/VjlWug5EaB83LLfPcXJrGjz/EHk967
hYDHcwPoamTegr1zlg3ckOLiWEhga2tv6aHPkshkcFphpnhRU/c=
=Nsb8
-----END PGP SIGNATURE-----
Merge tag 'linux-kselftest-kunit-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
Pull kunit updates from Shuah Khan:
- add support for running Rust documentation tests as KUnit tests
- make init, str, sync, types doctests compilable/testable
- add support for attributes API which include speed, modules
attributes, ability to filter and report attributes
- add support for marking tests slow using attributes API
- add attributes API documentation
- fix a wild-memory-access bug in kunit_filter_suites() and a possible
memory leak in kunit_filter_suites()
- add support for counting number of test suites in a module, list
action to kunit test modules, and test filtering on module tests
* tag 'linux-kselftest-kunit-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (25 commits)
kunit: fix struct kunit_attr header
kunit: replace KUNIT_TRIGGER_STATIC_STUB maro with KUNIT_STATIC_STUB_REDIRECT
kunit: Allow kunit test modules to use test filtering
kunit: Make 'list' action available to kunit test modules
kunit: Report the count of test suites in a module
kunit: fix uninitialized variables bug in attributes filtering
kunit: fix possible memory leak in kunit_filter_suites()
kunit: fix wild-memory-access bug in kunit_filter_suites()
kunit: Add documentation of KUnit test attributes
kunit: add tests for filtering attributes
kunit: time: Mark test as slow using test attributes
kunit: memcpy: Mark tests as slow using test attributes
kunit: tool: Add command line interface to filter and report attributes
kunit: Add ability to filter attributes
kunit: Add module attribute
kunit: Add speed attribute
kunit: Add test attributes API structure
MAINTAINERS: add Rust KUnit files to the KUnit entry
rust: support running Rust documentation tests as KUnit ones
rust: types: make doctests compilable/testable
...
facilities for lock guards.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=V/7H
-----END PGP SIGNATURE-----
Merge tag 'locking-core-2023-08-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull locking update from Ingo Molnar:
"Simplify the locking self-tests via using the new <linux/cleanup.h>
facilities for lock guards"
* tag 'locking-core-2023-08-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
lockdep/selftests: Use SBRM APIs for wait context tests
- Carve out the new CONFIG_LIST_HARDENED as a more focused subset of
CONFIG_DEBUG_LIST (Marco Elver).
- Fix kallsyms lookup failure under Clang LTO (Yonghong Song).
- Clarify documentation for CONFIG_UBSAN_TRAP (Jann Horn).
- Flexible array member conversion not carried in other tree (Gustavo
A. R. Silva).
- Various strlcpy() and strncpy() removals not carried in other trees
(Azeem Shaikh, Justin Stitt).
- Convert nsproxy.count to refcount_t (Elena Reshetova).
- Add handful of __counted_by annotations not carried in other trees,
as well as an LKDTM test.
- Fix build failure with gcc-plugins on GCC 14+.
- Fix selftests to respect SKIP for signal-delivery tests.
- Fix CFI warning for paravirt callback prototype.
- Clarify documentation for seq_show_option_n() usage.
-----BEGIN PGP SIGNATURE-----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=9ZWP
-----END PGP SIGNATURE-----
Merge tag 'hardening-v6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
Pull hardening updates from Kees Cook:
"As has become normal, changes are scattered around the tree (either
explicitly maintainer Acked or for trivial stuff that went ignored):
- Carve out the new CONFIG_LIST_HARDENED as a more focused subset of
CONFIG_DEBUG_LIST (Marco Elver)
- Fix kallsyms lookup failure under Clang LTO (Yonghong Song)
- Clarify documentation for CONFIG_UBSAN_TRAP (Jann Horn)
- Flexible array member conversion not carried in other tree (Gustavo
A. R. Silva)
- Various strlcpy() and strncpy() removals not carried in other trees
(Azeem Shaikh, Justin Stitt)
- Convert nsproxy.count to refcount_t (Elena Reshetova)
- Add handful of __counted_by annotations not carried in other trees,
as well as an LKDTM test
- Fix build failure with gcc-plugins on GCC 14+
- Fix selftests to respect SKIP for signal-delivery tests
- Fix CFI warning for paravirt callback prototype
- Clarify documentation for seq_show_option_n() usage"
* tag 'hardening-v6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (23 commits)
LoadPin: Annotate struct dm_verity_loadpin_trusted_root_digest with __counted_by
kallsyms: Change func signature for cleanup_symbol_name()
kallsyms: Fix kallsyms_selftest failure
nsproxy: Convert nsproxy.count to refcount_t
integrity: Annotate struct ima_rule_opt_list with __counted_by
lkdtm: Add FAM_BOUNDS test for __counted_by
Compiler Attributes: counted_by: Adjust name and identifier expansion
um: refactor deprecated strncpy to memcpy
um: vector: refactor deprecated strncpy
alpha: Replace one-element array with flexible-array member
hardening: Move BUG_ON_DATA_CORRUPTION to hardening options
list: Introduce CONFIG_LIST_HARDENED
list_debug: Introduce inline wrappers for debug checks
compiler_types: Introduce the Clang __preserve_most function attribute
gcc-plugins: Rename last_stmt() for GCC 14+
selftests/harness: Actually report SKIP for signal tests
x86/paravirt: Fix tlb_remove_table function callback prototype warning
EISA: Replace all non-returning strlcpy with strscpy
perf: Replace strlcpy with strscpy
um: Remove strlcpy declaration
...
* Make large writes to the page cache fill sparse parts of the cache
with large folios, then use large memcpy calls for the large folio.
* Track the per-block dirty state of each large folio so that a
buffered write to a single byte on a large folio does not result in a
(potentially) multi-megabyte writeback IO.
* Allow some directio completions to be performed in the initiating
task's context instead of punting through a workqueue. This will
reduce latency for some io_uring requests.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZM0Z1AAKCRBKO3ySh0YR
pp7BAQCzkKejCM0185tNIH/faHjzidSisNQkJ5HoB4Opq9U66AEA6IPuAdlPlM/J
FPW1oPq33Yn7AV4wXjUNFfDLzVb/Fgg=
=dFBU
-----END PGP SIGNATURE-----
Merge tag 'iomap-6.6-merge-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull iomap updates from Darrick Wong:
"We've got some big changes for this release -- I'm very happy to be
landing willy's work to enable large folios for the page cache for
general read and write IOs when the fs can make contiguous space
allocations, and Ritesh's work to track sub-folio dirty state to
eliminate the write amplification problems inherent in using large
folios.
As a bonus, io_uring can now process write completions in the caller's
context instead of bouncing through a workqueue, which should reduce
io latency dramatically. IOWs, XFS should see a nice performance bump
for both IO paths.
Summary:
- Make large writes to the page cache fill sparse parts of the cache
with large folios, then use large memcpy calls for the large folio.
- Track the per-block dirty state of each large folio so that a
buffered write to a single byte on a large folio does not result in
a (potentially) multi-megabyte writeback IO.
- Allow some directio completions to be performed in the initiating
task's context instead of punting through a workqueue. This will
reduce latency for some io_uring requests"
* tag 'iomap-6.6-merge-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: (26 commits)
iomap: support IOCB_DIO_CALLER_COMP
io_uring/rw: add write support for IOCB_DIO_CALLER_COMP
fs: add IOCB flags related to passing back dio completions
iomap: add IOMAP_DIO_INLINE_COMP
iomap: only set iocb->private for polled bio
iomap: treat a write through cache the same as FUA
iomap: use an unsigned type for IOMAP_DIO_* defines
iomap: cleanup up iomap_dio_bio_end_io()
iomap: Add per-block dirty state tracking to improve performance
iomap: Allocate ifs in ->write_begin() early
iomap: Refactor iomap_write_delalloc_punch() function out
iomap: Use iomap_punch_t typedef
iomap: Fix possible overflow condition in iomap_write_delalloc_scan
iomap: Add some uptodate state handling helpers for ifs state bitmap
iomap: Drop ifs argument from iomap_set_range_uptodate()
iomap: Rename iomap_page to iomap_folio_state and others
iomap: Copy larger chunks from userspace
iomap: Create large folios in the buffered write path
filemap: Allow __filemap_get_folio to allocate large folios
filemap: Add fgf_t typedef
...
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it was merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.
Link: https://lore.kernel.org/r/20230714175056.4066297-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
The rest of the updates for v6.6, some of the highlights include:
- A big API cleanup from Morimoto-san, rationalising the places we put
functions.
- Lots of work on the SOF framework, AMD and Intel drivers, including a
lot of cleanup and new device support.
- Standardisation of the presentation of jacks from drivers.
- Provision of some generic sound card DT properties.
- Conversion oof more drivers to the maple tree register cache.
- New drivers for AMD Van Gogh, AWInic AW88261, Cirrus Logic cs42l43,
various Intel platforms, Mediatek MT7986, RealTek RT1017 and StarFive
JH7110.
-----BEGIN PGP SIGNATURE-----
iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmTo6Y0ACgkQJNaLcl1U
h9AnaAf/XiBSnZl2i9wFckPy7bLcR74YrP1sFet5ZAqtpIt+/DvzQlgFAraHJ4tR
ScM2ZyyMwREaFhrHIXKLm8kbaOKeIjIMSxiHREVG9Wibq8d1TwaOHWAcXc9jMsQb
3G23Aizy2h5yD+/VTh8q6aV+fmYZJDfr1tIu8zWva90HcL2fMGvLjVdt24RNejTL
bgCC2GaaGP4pnC3xoBo1hGayvp0PES1BHVeyAXqMVscH+GCplPNJEdSHvU14OBck
1Nfjf5NVkh5G0pvrbG/yblsn1Zm5HRAzCE7gF1OHLFH27ygvp7fGk6TIXXpvw23c
OSvveYee2YLrf4kyndmv88Aq8JVTeA==
=9F/T
-----END PGP SIGNATURE-----
Merge tag 'asoc-v6.6' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Updates for v6.6
The rest of the updates for v6.6, some of the highlights include:
- A big API cleanup from Morimoto-san, rationalising the places we put
functions.
- Lots of work on the SOF framework, AMD and Intel drivers, including a
lot of cleanup and new device support.
- Standardisation of the presentation of jacks from drivers.
- Provision of some generic sound card DT properties.
- Conversion oof more drivers to the maple tree register cache.
- New drivers for AMD Van Gogh, AWInic AW88261, Cirrus Logic cs42l43,
various Intel platforms, Mediatek MT7986, RealTek RT1017 and StarFive
JH7110.
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTFp0I1jqZrAX+hPRXbK58LschIgwUCZOjkTAAKCRDbK58LschI
gx32AP9gaaHFBtOYBfoenKTJfMgv1WhtQHIBas+WN9ItmBx9MAEA4gm/VyQ6oD7O
EBjJKJQ2CZ/QKw7cNacXw+l5jF7/+Q0=
=8P7g
-----END PGP SIGNATURE-----
Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Daniel Borkmann says:
====================
pull-request: bpf-next 2023-08-25
We've added 87 non-merge commits during the last 8 day(s) which contain
a total of 104 files changed, 3719 insertions(+), 4212 deletions(-).
The main changes are:
1) Add multi uprobe BPF links for attaching multiple uprobes
and usdt probes, which is significantly faster and saves extra fds,
from Jiri Olsa.
2) Add support BPF cpu v4 instructions for arm64 JIT compiler,
from Xu Kuohai.
3) Add support BPF cpu v4 instructions for riscv64 JIT compiler,
from Pu Lehui.
4) Fix LWT BPF xmit hooks wrt their return values where propagating
the result from skb_do_redirect() would trigger a use-after-free,
from Yan Zhai.
5) Fix a BPF verifier issue related to bpf_kptr_xchg() with local kptr
where the map's value kptr type and locally allocated obj type
mismatch, from Yonghong Song.
6) Fix BPF verifier's check_func_arg_reg_off() function wrt graph
root/node which bypassed reg->off == 0 enforcement,
from Kumar Kartikeya Dwivedi.
7) Lift BPF verifier restriction in networking BPF programs to treat
comparison of packet pointers not as a pointer leak,
from Yafang Shao.
8) Remove unmaintained XDP BPF samples as they are maintained
in xdp-tools repository out of tree, from Toke Høiland-Jørgensen.
9) Batch of fixes for the tracing programs from BPF samples in order
to make them more libbpf-aware, from Daniel T. Lee.
10) Fix a libbpf signedness determination bug in the CO-RE relocation
handling logic, from Andrii Nakryiko.
11) Extend libbpf to support CO-RE kfunc relocations. Also follow-up
fixes for bpf_refcount shared ownership implementation,
both from Dave Marchevsky.
12) Add a new bpf_object__unpin() API function to libbpf,
from Daniel Xu.
13) Fix a memory leak in libbpf to also free btf_vmlinux
when the bpf_object gets closed, from Hao Luo.
14) Small error output improvements to test_bpf module, from Helge Deller.
* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (87 commits)
selftests/bpf: Add tests for rbtree API interaction in sleepable progs
bpf: Allow bpf_spin_{lock,unlock} in sleepable progs
bpf: Consider non-owning refs to refcounted nodes RCU protected
bpf: Reenable bpf_refcount_acquire
bpf: Use bpf_mem_free_rcu when bpf_obj_dropping refcounted nodes
bpf: Consider non-owning refs trusted
bpf: Ensure kptr_struct_meta is non-NULL for collection insert and refcount_acquire
selftests/bpf: Enable cpu v4 tests for RV64
riscv, bpf: Support unconditional bswap insn
riscv, bpf: Support signed div/mod insns
riscv, bpf: Support 32-bit offset jmp insn
riscv, bpf: Support sign-extension mov insns
riscv, bpf: Support sign-extension load insns
riscv, bpf: Fix missing exception handling and redundant zext for LDX_B/H/W
samples/bpf: Add note to README about the XDP utilities moved to xdp-tools
samples/bpf: Cleanup .gitignore
samples/bpf: Remove the xdp_sample_pkts utility
samples/bpf: Remove the xdp1 and xdp2 utilities
samples/bpf: Remove the xdp_rxq_info utility
samples/bpf: Remove the xdp_redirect* utilities
...
====================
Link: https://lore.kernel.org/r/20230825194319.12727-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The gcc compiler translates on some architectures the 64-bit
__builtin_clzll() function to a call to the libgcc function __clzdi2(),
which should take a 64-bit parameter on 32- and 64-bit platforms.
But in the current kernel code, the built-in __clzdi2() function is
defined to operate (wrongly) on 32-bit parameters if BITS_PER_LONG ==
32, thus the return values on 32-bit kernels are in the range from
[0..31] instead of the expected [0..63] range.
This patch fixes the in-kernel functions __clzdi2() and __ctzdi2() to
take a 64-bit parameter on 32-bit kernels as well, thus it makes the
functions identical for 32- and 64-bit kernels.
This bug went unnoticed since kernel 3.11 for over 10 years, and here
are some possible reasons for that:
a) Some architectures have assembly instructions to count the bits and
which are used instead of calling __clzdi2(), e.g. on x86 the bsr
instruction and on ppc cntlz is used. On such architectures the
wrong __clzdi2() implementation isn't used and as such the bug has
no effect and won't be noticed.
b) Some architectures link to libgcc.a, and the in-kernel weak
functions get replaced by the correct 64-bit variants from libgcc.a.
c) __builtin_clzll() and __clzdi2() doesn't seem to be used in many
places in the kernel, and most likely only in uncritical functions,
e.g. when printing hex values via seq_put_hex_ll(). The wrong return
value will still print the correct number, but just in a wrong
formatting (e.g. with too many leading zeroes).
d) 32-bit kernels aren't used that much any longer, so they are less
tested.
A trivial testcase to verify if the currently running 32-bit kernel is
affected by the bug is to look at the output of /proc/self/maps:
Here the kernel uses a correct implementation of __clzdi2():
root@debian:~# cat /proc/self/maps
00010000-00019000 r-xp 00000000 08:05 787324 /usr/bin/cat
00019000-0001a000 rwxp 00009000 08:05 787324 /usr/bin/cat
0001a000-0003b000 rwxp 00000000 00:00 0 [heap]
f7551000-f770d000 r-xp 00000000 08:05 794765 /usr/lib/hppa-linux-gnu/libc.so.6
...
and this kernel uses the broken implementation of __clzdi2():
root@debian:~# cat /proc/self/maps
0000000010000-0000000019000 r-xp 00000000 000000008:000000005 787324 /usr/bin/cat
0000000019000-000000001a000 rwxp 000000009000 000000008:000000005 787324 /usr/bin/cat
000000001a000-000000003b000 rwxp 00000000 00:00 0 [heap]
00000000f73d1000-00000000f758d000 r-xp 00000000 000000008:000000005 794765 /usr/lib/hppa-linux-gnu/libc.so.6
...
Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: 4df87bb7b6 ("lib: add weak clz/ctz functions")
Cc: Chanho Min <chanho.min@lge.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: stable@vger.kernel.org # v3.11+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
or aren't considered suitable for a -stable backport.
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZOjuGgAKCRDdBJ7gKXxA
jkLlAQDY9sYxhQZp1PFLirUIPeOBjEyifVy6L6gCfk9j0snLggEA2iK+EtuJt2Dc
SlMfoTq29zyU/YgfKKwZEVKtPJZOHQU=
=oTcj
-----END PGP SIGNATURE-----
Merge tag 'mm-hotfixes-stable-2023-08-25-11-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"18 hotfixes. 13 are cc:stable and the remainder pertain to post-6.4
issues or aren't considered suitable for a -stable backport"
* tag 'mm-hotfixes-stable-2023-08-25-11-07' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
shmem: fix smaps BUG sleeping while atomic
selftests: cachestat: catch failing fsync test on tmpfs
selftests: cachestat: test for cachestat availability
maple_tree: disable mas_wr_append() when other readers are possible
madvise:madvise_free_pte_range(): don't use mapcount() against large folio for sharing check
madvise:madvise_free_huge_pmd(): don't use mapcount() against large folio for sharing check
madvise:madvise_cold_or_pageout_pte_range(): don't use mapcount() against large folio for sharing check
mm: multi-gen LRU: don't spin during memcg release
mm: memory-failure: fix unexpected return value in soft_offline_page()
radix tree: remove unused variable
mm: add a call to flush_cache_vmap() in vmap_pfn()
selftests/mm: FOLL_LONGTERM need to be updated to 0x100
nilfs2: fix general protection fault in nilfs_lookup_dirty_data_buffers()
mm/gup: handle cont-PTE hugetlb pages correctly in gup_must_unshare() via GUP-fast
selftests: cgroup: fix test_kmem_basic less than error
mm: enable page walking API to lock vmas during the walk
smaps: use vm_normal_page_pmd() instead of follow_trans_huge_pmd()
mm/gup: reintroduce FOLL_NUMA as FOLL_HONOR_NUMA_FAULT
Allocations and frees are globally serialized on the pcpu lock (and the
CPU hotplug lock if enabled, which is the case on Debian).
At least one frequent consumer allocates 4 back-to-back counters (and
frees them in the same manner), exacerbating the problem.
While this does not fully remedy scalability issues, it is a step
towards that goal and provides immediate relief.
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Reviewed-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: Vegard Nossum <vegard.nossum@oracle.com>
Link: https://lore.kernel.org/r/20230823050609.2228718-2-mjguzik@gmail.com
[Dennis: reflowed a few lines]
Signed-off-by: Dennis Zhou <dennis@kernel.org>
On powerpc64le checksum kunit tests work:
[ 2.011457][ T1] KTAP version 1
[ 2.011662][ T1] # Subtest: checksum
[ 2.011848][ T1] 1..3
[ 2.034710][ T1] ok 1 test_csum_fixed_random_inputs
[ 2.079325][ T1] ok 2 test_csum_all_carry_inputs
[ 2.127102][ T1] ok 3 test_csum_no_carry_inputs
[ 2.127202][ T1] # checksum: pass:3 fail:0 skip:0 total:3
[ 2.127533][ T1] # Totals: pass:3 fail:0 skip:0 total:3
[ 2.127956][ T1] ok 1 checksum
But on powerpc64 and powerpc32 they fail:
[ 1.859890][ T1] KTAP version 1
[ 1.860041][ T1] # Subtest: checksum
[ 1.860201][ T1] 1..3
[ 1.861927][ T58] # test_csum_fixed_random_inputs: ASSERTION FAILED at lib/checksum_kunit.c:243
[ 1.861927][ T58] Expected result == expec, but
[ 1.861927][ T58] result == 54991 (0xd6cf)
[ 1.861927][ T58] expec == 33316 (0x8224)
[ 1.863742][ T1] not ok 1 test_csum_fixed_random_inputs
[ 1.864520][ T60] # test_csum_all_carry_inputs: ASSERTION FAILED at lib/checksum_kunit.c:267
[ 1.864520][ T60] Expected result == expec, but
[ 1.864520][ T60] result == 255 (0xff)
[ 1.864520][ T60] expec == 65280 (0xff00)
[ 1.868820][ T1] not ok 2 test_csum_all_carry_inputs
[ 1.869977][ T62] # test_csum_no_carry_inputs: ASSERTION FAILED at lib/checksum_kunit.c:306
[ 1.869977][ T62] Expected result == expec, but
[ 1.869977][ T62] result == 64515 (0xfc03)
[ 1.869977][ T62] expec == 0 (0x0)
[ 1.872060][ T1] not ok 3 test_csum_no_carry_inputs
[ 1.872102][ T1] # checksum: pass:0 fail:3 skip:0 total:3
[ 1.872458][ T1] # Totals: pass:0 fail:3 skip:0 total:3
[ 1.872791][ T1] not ok 3 checksum
This is because all expected values were calculated for X86 which
is little endian. On big endian systems all precalculated 16 bits
halves must be byte swapped.
And this is confirmed by a huge amount of sparse errors when building
with C=2
So fix all sparse errors and it will naturally work on all endianness.
Fixes: 688eb8191b ("x86/csum: Improve performance of `csum_partial`")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Avoid setting the variables until necessary, and actually use the
variables where applicable. Introducing a variable for the slots array
avoids spanning multiple lines.
Add the missing argument to the documentation.
Use the node type when setting the metadata instead of blindly assuming
the type.
Finally, add a trace point to the function for successful store.
Link: https://lkml.kernel.org/r/20230819004356.1454718-3-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "New page table range API", v6.
This patchset changes the API used by the MM to set up page table entries.
The four APIs are:
set_ptes(mm, addr, ptep, pte, nr)
update_mmu_cache_range(vma, addr, ptep, nr)
flush_dcache_folio(folio)
flush_icache_pages(vma, page, nr)
flush_dcache_folio() isn't technically new, but no architecture
implemented it, so I've done that for them. The old APIs remain around
but are mostly implemented by calling the new interfaces.
The new APIs are based around setting up N page table entries at once.
The N entries belong to the same PMD, the same folio and the same VMA, so
ptep++ is a legitimate operation, and locking is taken care of for you.
Some architectures can do a better job of it than just a loop, but I have
hesitated to make too deep a change to architectures I don't understand
well.
One thing I have changed in every architecture is that PG_arch_1 is now a
per-folio bit instead of a per-page bit when used for dcache clean/dirty
tracking. This was something that would have to happen eventually, and it
makes sense to do it now rather than iterate over every page involved in a
cache flush and figure out if it needs to happen.
The point of all this is better performance, and Fengwei Yin has measured
improvement on x86. I suspect you'll see improvement on your architecture
too. Try the new will-it-scale test mentioned here:
https://lore.kernel.org/linux-mm/20230206140639.538867-5-fengwei.yin@intel.com/
You'll need to run it on an XFS filesystem and have
CONFIG_TRANSPARENT_HUGEPAGE set.
This patchset is the basis for much of the anonymous large folio work
being done by Ryan, so it's received quite a lot of testing over the last
few months.
This patch (of 38):
Determine if a value lies within a range more efficiently (subtraction +
comparison vs two comparisons and an AND). It also has useful (under some
circumstances) behaviour if the range exceeds the maximum value of the
type. Convert all the conflicting definitions of in_range() within the
kernel; some can use the generic definition while others need their own
definition.
Link: https://lkml.kernel.org/r/20230802151406.3735276-1-willy@infradead.org
Link: https://lkml.kernel.org/r/20230802151406.3735276-2-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The current implementation of append may cause duplicate data and/or
incorrect ranges to be returned to a reader during an update. Although
this has not been reported or seen, disable the append write operation
while the tree is in rcu mode out of an abundance of caution.
During the analysis of the mas_next_slot() the following was
artificially created by separating the writer and reader code:
Writer: reader:
mas_wr_append
set end pivot
updates end metata
Detects write to last slot
last slot write is to start of slot
store current contents in slot
overwrite old end pivot
mas_next_slot():
read end metadata
read old end pivot
return with incorrect range
store new value
Alternatively:
Writer: reader:
mas_wr_append
set end pivot
updates end metata
Detects write to last slot
last lost write to end of slot
store value
mas_next_slot():
read end metadata
read old end pivot
read new end pivot
return with incorrect range
set old end pivot
There may be other accesses that are not safe since we are now updating
both metadata and pointers, so disabling append if there could be rcu
readers is the safest action.
Link: https://lkml.kernel.org/r/20230819004356.1454718-2-Liam.Howlett@oracle.com
Fixes: 54a611b605 ("Maple Tree: add new data structure")
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Sparse is not happy to see non-static variable without declaration:
lib/vsprintf.c:61:6: warning: symbol 'no_hash_pointers' was not declared.
Should it be static?
Declare respective variable in the sprintf.h. With this, add a comment to
discourage its use if no real need.
Link: https://lkml.kernel.org/r/20230814163344.17429-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Marco Elver <elver@google.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "lib/vsprintf: Rework header inclusions", v3.
Some patches that reduce the mess with the header inclusions related to
vsprintf.c module. Each patch has its own description, and has no
dependencies to each other, except the collisions over modifications of
the same places. Hence the series.
This patch (of 2):
kernel.h is being used as a dump for all kinds of stuff for a long time.
sprintf() and friends are used in many drivers without need of the full
kernel.h dependency train with it.
Here is the attempt on cleaning it up by splitting out sprintf() and
friends.
Link: https://lkml.kernel.org/r/20230814163344.17429-1-andriy.shevchenko@linux.intel.com
Link: https://lkml.kernel.org/r/20230814163344.17429-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Marco Elver <elver@google.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reorder the operations for split and spanning stores so that new data is
placed in the tree prior to marking the old data as dead. This will limit
re-walks on dead data to just once instead of a retry loop.
The order of operations is as follows: Create the new data, put the new
data in place, mark the top node of the old data as dead.
Then repair parent links in the reused nodes through all levels of the
tree, following the new nodes downwards. Finally walk the top dead node
looking for nodes that are no longer used, or subtrees that should be
destroyed (marked dead throughout then freed), follow the partially used
nodes downwards to discover other dead nodes and subtrees.
Link: https://lkml.kernel.org/r/20230804165951.2661157-7-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
All calls to mas_adopt_children() currently pass the parent as the node in
the maple state. Allow for the parent pointer that is passed in to be
used instead.
Link: https://lkml.kernel.org/r/20230804165951.2661157-6-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add a definition to shorten long code lines and clarify what the code is
doing. Use the new definition to get the maple tree parent pointer from
the maple state where possible.
Link: https://lkml.kernel.org/r/20230804165951.2661157-5-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mas_replace() has a single user that takes a flag which is now always
true. Replace this function with mas_put_in_tree() to better align with
mas_replace_node(). Inline the remaining logic into the only caller;
mas_wmb_replace().
Link: https://lkml.kernel.org/r/20230804165951.2661157-4-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Replacing nodes may cause a live lock-up if CPU resources are saturated by
write operations on the tree by continuously retrying on dead nodes. To
avoid the continuous retry scenario, ensure the new node is inserted into
the tree prior to marking the old data as dead. This will define a window
where old and new data is swapped.
When reusing lower level nodes, ensure the parent pointer is updated after
the parent is marked dead. This ensures that the child is still reachable
from the top of the tree, but walking up to a dead node will result in a
single retry that will start a fresh walk from the top down through the
new node.
Link: https://lkml.kernel.org/r/20230804165951.2661157-3-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "maple_tree: Change replacement strategy".
The maple tree marks nodes dead as soon as they are going to be replaced.
This could be problematic when used in the RCU context since the writer
may be starved of CPU time by the readers. This patch set addresses the
issue by switching the data replacement strategy to one that will only
mark data as dead once the new data is available.
This series changes the ordering of the node replacement so that the new
data is live before the old data is marked 'dead'. When readers hit
'dead' nodes, they will restart from the top of the tree and end up in the
new data.
In more complex scenarios, the replacement strategy means a subtree is
built and graphed into the tree leaving some nodes to point to the old
parent. The view of tasks into the old data will either remain with the
old data, or see the new data once the old data is marked 'dead'.
Iterators will see the 'dead' node and restart on their own and switch to
the new data. There is no risk of the reader seeing old data in these
cases.
The 'dead' subtree of data is then fully marked dead, but reused nodes
will still point to the dead nodes until the parent pointer is updated.
Walking up to a 'dead' node will cause a re-walk from the top of the tree
and enter the new data area where old data is not reachable.
Once the parent pointers are fully up to date in the active data, the
'dead' subtree is iterated to collect entirely 'dead' subtrees, and dead
nodes (nodes that partially contained reused data).
This patch (of 6):
When dumping the tree, honour formatting request to output hex for the
maple node type arange64.
Link: https://lkml.kernel.org/r/20230804165951.2661157-1-Liam.Howlett@oracle.com
Link: https://lkml.kernel.org/r/20230804165951.2661157-2-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Recent versions of clang warn about an unused variable, though older
versions saw the 'slot++' as a use and did not warn:
radix-tree.c:1136:50: error: parameter 'slot' set but not used [-Werror,-Wunused-but-set-parameter]
It's clearly not needed any more, so just remove it.
Link: https://lkml.kernel.org/r/20230811131023.2226509-1-arnd@kernel.org
Fixes: 3a08cd52c3 ("radix tree: Remove multiorder support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Rong Tao <rongtao@cestc.cn>
Cc: Tom Rix <trix@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add parameter descriptions to struct kunit_attr header for the
parameters attr_default and print.
Fixes: 39e92cb1e4 ("kunit: Add test attributes API structure")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308180127.VD7YRPGa-lkp@intel.com/
Signed-off-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
When adding koject or kset, we have made sure that ktype cannot be NULL.
Therefore, after adding koject or kset, there is no need to worry about
ktype being NULL. Clear all ktype-related redundancy checks.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20230805084114.1298-3-thunder.leizhen@huaweicloud.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When I register a kset in the following way:
static struct kset my_kset;
kobject_set_name(&my_kset.kobj, "my_kset");
ret = kset_register(&my_kset);
A null pointer dereference exception is occurred:
[ 4453.568337] Unable to handle kernel NULL pointer dereference at \
virtual address 0000000000000028
... ...
[ 4453.810361] Call trace:
[ 4453.813062] kobject_get_ownership+0xc/0x34
[ 4453.817493] kobject_add_internal+0x98/0x274
[ 4453.822005] kset_register+0x5c/0xb4
[ 4453.825820] my_kobj_init+0x44/0x1000 [my_kset]
... ...
Because I didn't initialize my_kset.kobj.ktype.
According to the description in Documentation/core-api/kobject.rst:
- A ktype is the type of object that embeds a kobject. Every structure
that embeds a kobject needs a corresponding ktype.
So add sanity check to make sure kset->kobj.ktype is not NULL.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20230805084114.1298-2-thunder.leizhen@huaweicloud.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cross-merge networking fixes after downstream PR.
Conflicts:
drivers/net/ethernet/sfc/tc.c
fa165e1949 ("sfc: don't unregister flow_indr if it was never registered")
3bf969e88a ("sfc: add MAE table machinery for conntrack table")
https://lore.kernel.org/all/20230818112159.7430e9b4@canb.auug.org.au/
No adjacent changes.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The APIs that allow backtracing across CPUs have always had a way to
exclude the current CPU. This convenience means callers didn't need to
find a place to allocate a CPU mask just to handle the common case.
Let's extend the API to take a CPU ID to exclude instead of just a
boolean. This isn't any more complex for the API to handle and allows the
hardlockup detector to exclude a different CPU (the one it already did a
trace for) without needing to find space for a CPU mask.
Arguably, this new API also encourages safer behavior. Specifically if
the caller wants to avoid tracing the current CPU (maybe because they
already traced the current CPU) this makes it more obvious to the caller
that they need to make sure that the current CPU ID can't change.
[akpm@linux-foundation.org: fix trigger_allbutcpu_cpu_backtrace() stub]
Link: https://lkml.kernel.org/r/20230804065935.v4.1.Ia35521b91fc781368945161d7b28538f9996c182@changeid
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: kernel test robot <lkp@intel.com>
Cc: Lecopzer Chen <lecopzer.chen@mediatek.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Pingfan Liu <kernelfans@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Replace internal logic with separate bitrev library.
Link: https://lkml.kernel.org/r/20230730081717.1498217-1-sanpeqf@gmail.com
Signed-off-by: John Sanpe <sanpeqf@gmail.com>
Cc: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
It is expected that most callers should _ignore_ the errors return by
debugfs_create_dir() in ei_debugfs_init().
Link: https://lkml.kernel.org/r/20230719144355.6720-1-machel@vivo.com
Signed-off-by: Wang Ming <machel@vivo.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
It is expected that most callers should _ignore_ the errors return by
debugfs_create_dir() in err_inject_init().
Link: https://lkml.kernel.org/r/20230713082455.2415-1-machel@vivo.com
Signed-off-by: Wang Ming <machel@vivo.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
kmap() has been deprecated in favor of the kmap_local_page() due to high
cost, restricted mapping space, the overhead of a global lock for
synchronization, and making the process sleep in the absence of free
slots.
kmap_local_page() is faster than kmap() and offers thread-local and
CPU-local mappings, take pagefaults in a local kmap region and preserves
preemption by saving the mappings of outgoing tasks and restoring those of
the incoming one during a context switch.
The mappings are kept thread local in the functions “dmirror_do_read”
and “dmirror_do_write” in test_hmm.c
Therefore, replace kmap() with kmap_local_page() and use
mempcy_from/to_page() to avoid open coding kmap_local_page() + memcpy() +
kunmap_local().
Remove the unused variable “tmp”.
Link: https://lkml.kernel.org/r/20230610175712.GA348514@sumitra.com
Signed-off-by: Sumitra Sharma <sumitraartsy@gmail.com>
Suggested-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Reviewed-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Cc: Deepak R Varma <drv@mailo.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mas_prealloc() may walk partially down the tree before finding that a
split or spanning store is needed. When the write occurs, relax the
logic on resetting the walk so that partial walks will not restart, but
walks that have gone too far (a store that affects beyond the current
node) should be restarted.
Link: https://lkml.kernel.org/r/20230724183157.3939892-15-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Calculate the number of nodes based on the pending write action instead
of assuming the worst case.
This addresses a performance regression introduced in platforms that
have longer allocation timing.
Link: https://lkml.kernel.org/r/20230724183157.3939892-14-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Relocate it and call mas_wr_extend_null() from within mas_wr_end_piv().
Extending the NULL may affect the end pivot value so call
mas_wr_endtend_null() from within mas_wr_end_piv() to keep it all
together.
Link: https://lkml.kernel.org/r/20230724183157.3939892-12-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
mas_rebalance() is called to rebalance an insufficient node into a
single node or two sufficient nodes. The preallocation estimate is
always too many in this case as the height of the tree will never grow
and there is no possibility to have a three way split in this case, so
revise the node allocation count.
Link: https://lkml.kernel.org/r/20230724183157.3939892-9-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The current preallocation strategy is to preallocate the absolute
worst-case allocation for a tree modification. The entry (or NULL) is
needed to know how many nodes are needed to write to the tree. Start by
adding the argument to the mas_preallocate() definition.
Link: https://lkml.kernel.org/r/20230724183157.3939892-8-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Add some benchmarking functions in testing for mas_prev(). This is
useful to ensure there are no regressions added during modifications.
Link: https://lkml.kernel.org/r/20230724183157.3939892-3-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "Reduce preallocations for maple tree", v3.
Initial work on preallocations showed no regression in performance during
testing, but recently some users (both on [1] and off [android] list) have
reported that preallocating the worst-case number of nodes has caused some
slow down. This patch set addresses the number of allocations in a few
ways.
During munmap() most munmap() operations will remove a single VMA, so
leverage the fact that the maple tree can place a single pointer at range
0 - 0 without allocating. This is done by changing the index of the VMAs
to be indexed by the count, starting at 0.
Re-introduce the entry argument to mas_preallocate() so that a more
intelligent guess of the node count can be made.
Implement the more intelligent guess of the node count, although there is
more work to be done.
During development of v2 of this patch set, I also noticed that the number
of nodes being allocated for a rebalance was beyond what could possibly be
needed. This is addressed in patch 0008.
This patch (of 15):
Add a way to test the speed of mas_for_each() to the testing code.
Link: https://lkml.kernel.org/r/20230724183157.3939892-1-Liam.Howlett@oracle.com
Link: https://lkml.kernel.org/r/20230724183157.3939892-2-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Use lockdep to check the write path in the maple tree holds the lock in
write mode.
Introduce mt_write_lock_is_held() to check if the lock is held for
writing. Update the necessary checks for rcu_dereference_protected() to
use the new write lock check.
Link: https://lkml.kernel.org/r/20230714195551.894800-5-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oliver Sang <oliver.sang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Replace FGP_FLAGS with GFP_FLAGS
Link: https://lkml.kernel.org/r/20230715084038.987955-1-rppt@kernel.org
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Replace "Insert and entry at a give index" with "Insert an entry at a
given index"
Link: https://lkml.kernel.org/r/20230715143920.994812-1-rppt@kernel.org
Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
test_pages() tests the page allocator by calling alloc_pages() with
different orders up to order 10.
However, different architectures and platforms support different maximum
contiguous allocation sizes. The default maximum allocation order
(MAX_ORDER) is 10, but architectures can use CONFIG_ARCH_FORCE_MAX_ORDER
to override this. On platforms where this is less than 10, test_meminit()
will blow up with a WARN(). This is expected, so let's not do that.
Replace the hardcoded "10" with the MAX_ORDER macro so that we test
allocations up to the expected platform limit.
Link: https://lkml.kernel.org/r/20230714015238.47931-1-ajd@linux.ibm.com
Fixes: 5015a300a5 ("lib: introduce test_meminit module")
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
Cc: Xiaoke Wang <xkernel.wang@foxmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The internal function mas_first_entry() is no longer used, so drop it.
Link: https://lkml.kernel.org/r/20230711035444.526-9-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Replace mas_logical_pivot() with mas_safe_pivot() and drop
mas_logical_pivot() since it won't be used anymore. We can do this since
now all nodes will have node limit pivot (if it is not full node).
Link: https://lkml.kernel.org/r/20230711035444.526-8-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Instead of using mas_first_entry() to find the leftmost leaf, use a simple
loop instead. Remove an unneeded check for root node. To make the error
message more accurate, check pivots first and then slots, because checking
slots depend on the node limit pivot to break the loop.
Link: https://lkml.kernel.org/r/20230711035444.526-7-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Update mas_validate_limits() to check root node, check node limit pivot if
there is enough room for it to exist and check data_end. Remove the check
for child existence as it is done in mas_validate_child_slot().
Link: https://lkml.kernel.org/r/20230711035444.526-6-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Don't break the loop before checking the last slot. Also here check if
non-leaf nodes are missing children.
Link: https://lkml.kernel.org/r/20230711035444.526-5-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Make mas_validate_gaps() check whether the offset in the metadata points
to the largest gap. By the way, simplify this function.
Add the verification that gaps beyond the node limit are zero.
Link: https://lkml.kernel.org/r/20230711035444.526-4-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "Improve the validation for maple tree and some cleanup", v2.
This patch (of 7):
Do not use a special offset to indicate that there is no gap. When there
is no gap, offset can point to any valid slots because its gap is 0.
Link: https://lkml.kernel.org/r/20230711035444.526-1-zhangpeng.00@bytedance.com
Link: https://lkml.kernel.org/r/20230711035444.526-3-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
When expanding a range in two directions, only partially overwriting the
previous and next ranges, the number of entries will not be increased, so
we can just update the pivots as a fast path. However, it may introduce
potential risks in RCU mode, because it updates two pivots. We only
enable it in non-RCU mode.
Link: https://lkml.kernel.org/r/20230628073657.75314-5-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
When the new range can be completely covered by the original last range
without touching the boundaries on both sides, two new entries can be
appended to the end as a fast path. We update the original last pivot at
the end, and the newly appended two entries will not be accessed before
this, so it is also safe in RCU mode.
This is useful for sequential insertion, which is what we do in
dup_mmap(). Enabling BENCH_FORK in test_maple_tree and just running
bench_forking() gives the following time-consuming numbers:
before: after:
17,874.83 msec 15,738.38 msec
It shows about a 12% performance improvement for duplicating VMAs.
Link: https://lkml.kernel.org/r/20230628073657.75314-4-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Patch series "Optimize the fast path of mas_store()", v4.
Add fast paths for mas_wr_append() and mas_wr_slot_store() respectively.
The newly added fast path of mas_wr_append() is used in fork() and how
much it benefits fork() depends on how many VMAs are duplicated.
Thanks Liam for the review.
This patch (of 4):
Add tests for all cases of mas_wr_append() and mas_wr_slot_store().
Link: https://lkml.kernel.org/r/20230628073657.75314-1-zhangpeng.00@bytedance.com
Link: https://lkml.kernel.org/r/20230628073657.75314-2-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
The documentation of mt_next() claims that it starts the search at the
provided index. That's incorrect as it starts the search after the
provided index.
The documentation of mt_find() is slightly confusing. "Handles locking"
is not really helpful as it does not explain how the "locking" works.
Also the documentation of index talks about a range, while in reality the
index is updated on a succesful search to the index of the found entry
plus one.
Fix similar issues for mt_find_after() and mt_prev().
Reword the confusing "Note: Will not return the zero entry." comment on
mt_for_each() and document @__index correctly.
Link: https://lkml.kernel.org/r/87ttw2n556.ffs@tglx
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Shanker Donthineni <sdonthineni@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
If a testcase returns a wrong (unexpected) value, print the expected and
returned value in hex notation in addition to the decimal notation.
This is very useful in tests which bit-shift hex values left or right and
helped me a lot while developing the JIT compiler for the hppa architecture.
Additionally fix two typos: dowrd -> dword, tall calls -> tail calls.
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/ZN6ZAAVoWZpsD1Jf@p100
A recent change in clang allows it to consider more expressions as
compile time constants, which causes it to point out an implicit
conversion in the scanf tests:
lib/test_scanf.c:661:2: warning: implicit conversion from 'int' to 'unsigned char' changes value from -168 to 88 [-Wconstant-conversion]
661 | test_number_prefix(unsigned char, "0xA7", "%2hhx%hhx", 0, 0xa7, 2, check_uchar);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
lib/test_scanf.c:609:29: note: expanded from macro 'test_number_prefix'
609 | T result[2] = {~expect[0], ~expect[1]}; \
| ~ ^~~~~~~~~~
1 warning generated.
The result of the bitwise negation is the type of the operand after
going through the integer promotion rules, so this truncation is
expected but harmless, as the initial values in the result array get
overwritten by _test() anyways. Add an explicit cast to the expected
type in test_number_prefix() to silence the warning. There is no
functional change, as all the tests still pass with GCC 13.1.0 and clang
18.0.0.
Cc: stable@vger.kernel.org
Link: https://github.com/ClangBuiltLinux/linuxq/issues/1899
Link: 610ec954e1
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20230807-test_scanf-wconstant-conversion-v2-1-839ca39083e1@kernel.org
BUG_ON_DATA_CORRUPTION is turning detected corruptions of list data
structures from WARNings into BUGs. This can be useful to stop further
corruptions or even exploitation attempts.
However, the option has less to do with debugging than with hardening.
With the introduction of LIST_HARDENED, it makes more sense to move it
to the hardening options, where it selects LIST_HARDENED instead.
Without this change, combining BUG_ON_DATA_CORRUPTION with LIST_HARDENED
alone wouldn't be possible, because DEBUG_LIST would always be selected
by BUG_ON_DATA_CORRUPTION.
Signed-off-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20230811151847.1594958-4-elver@google.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Numerous production kernel configs (see [1, 2]) are choosing to enable
CONFIG_DEBUG_LIST, which is also being recommended by KSPP for hardened
configs [3]. The motivation behind this is that the option can be used
as a security hardening feature (e.g. CVE-2019-2215 and CVE-2019-2025
are mitigated by the option [4]).
The feature has never been designed with performance in mind, yet common
list manipulation is happening across hot paths all over the kernel.
Introduce CONFIG_LIST_HARDENED, which performs list pointer checking
inline, and only upon list corruption calls the reporting slow path.
To generate optimal machine code with CONFIG_LIST_HARDENED:
1. Elide checking for pointer values which upon dereference would
result in an immediate access fault (i.e. minimal hardening
checks). The trade-off is lower-quality error reports.
2. Use the __preserve_most function attribute (available with Clang,
but not yet with GCC) to minimize the code footprint for calling
the reporting slow path. As a result, function size of callers is
reduced by avoiding saving registers before calling the rarely
called reporting slow path.
Note that all TUs in lib/Makefile already disable function tracing,
including list_debug.c, and __preserve_most's implied notrace has
no effect in this case.
3. Because the inline checks are a subset of the full set of checks in
__list_*_valid_or_report(), always return false if the inline
checks failed. This avoids redundant compare and conditional
branch right after return from the slow path.
As a side-effect of the checks being inline, if the compiler can prove
some condition to always be true, it can completely elide some checks.
Since DEBUG_LIST is functionally a superset of LIST_HARDENED, the
Kconfig variables are changed to reflect that: DEBUG_LIST selects
LIST_HARDENED, whereas LIST_HARDENED itself has no dependency on
DEBUG_LIST.
Running netperf with CONFIG_LIST_HARDENED (using a Clang compiler with
"preserve_most") shows throughput improvements, in my case of ~7% on
average (up to 20-30% on some test cases).
Link: https://r.android.com/1266735 [1]
Link: https://gitlab.archlinux.org/archlinux/packaging/packages/linux/-/blob/main/config [2]
Link: https://kernsec.org/wiki/index.php/Kernel_Self_Protection_Project/Recommended_Settings [3]
Link: https://googleprojectzero.blogspot.com/2019/11/bad-binder-android-in-wild-exploit.html [4]
Signed-off-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20230811151847.1594958-3-elver@google.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Turn the list debug checking functions __list_*_valid() into inline
functions that wrap the out-of-line functions. Care is taken to ensure
the inline wrappers are always inlined, so that additional compiler
instrumentation (such as sanitizers) does not result in redundant
outlining.
This change is preparation for performing checks in the inline wrappers.
No functional change intended.
Signed-off-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20230811151847.1594958-2-elver@google.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Altivec is only available for powerpc hosts, so only check for its
availability when the host is powerpc, to avoid error messages being
shown on architectures other than x86, arm or powerpc.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Link: https://lore.kernel.org/r/20230731104911.411964-6-kernel@xen0n.name
Signed-off-by: Song Liu <song@kernel.org>
Currently when the raid6test utility is built, the resulting binary and
an int.uc file are not being ignored, which can get inadvertently
committed as a result when one works on the raid6 code. Ignore them to
make `git status` clean at all times.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Link: https://lore.kernel.org/r/20230731104911.411964-5-kernel@xen0n.name
Signed-off-by: Song Liu <song@kernel.org>
Use tabs/spaces consistently: hard tabs for marking recipe lines only,
spaces for everything else.
Also, the OPTFLAGS declaration actually included the tabs preceding the
line comment, making compiler invocation lines unnecessarily long. As
the entire block of declarations are meant for ad-hoc customization
(otherwise they would probably make use of `?=` instead of `=`), move
the "Adjust as desired" comment above the block too to fix the long
invocation lines.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Link: https://lore.kernel.org/r/20230731104911.411964-4-kernel@xen0n.name
Signed-off-by: Song Liu <song@kernel.org>
The export directives for the tables are already emitted with __KERNEL__
guards, but the <linux/export.h> include is not, causing errors when
building the raid6test program. Guard this include too to fix the
raid6test build.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Link: https://lore.kernel.org/r/20230731104911.411964-3-kernel@xen0n.name
Signed-off-by: Song Liu <song@kernel.org>
There is no exported symbol left in recov.c, so the include is now
unnecessary, and breaks the raid6test build. Remove it.
Signed-off-by: WANG Xuerui <git@xen0n.name>
Link: https://lore.kernel.org/r/20230731104911.411964-2-kernel@xen0n.name
Signed-off-by: Song Liu <song@kernel.org>
issues, or are not considered suitable for -stable backporting.
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZNad/gAKCRDdBJ7gKXxA
jmw6AP9u6k8XcS8ec3/u0IUEuh7ckHx5Vvjfmo5YgWlIJDeWegD9G2fh3ZJgcjMO
jMssklfXmP+QSijCIxUva1TlzwtPDAQ=
=MqiN
-----END PGP SIGNATURE-----
Merge tag 'mm-hotfixes-stable-2023-08-11-13-44' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc fixes from Andrew Morton:
"14 hotfixes. 11 of these are cc:stable and the remainder address
post-6.4 issues, or are not considered suitable for -stable
backporting"
* tag 'mm-hotfixes-stable-2023-08-11-13-44' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm:
mm/damon/core: initialize damo_filter->list from damos_new_filter()
nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput
selftests: cgroup: fix test_kmem_basic false positives
fs/proc/kcore: reinstate bounce buffer for KCORE_TEXT regions
MAINTAINERS: add maple tree mailing list
mm: compaction: fix endless looping over same migrate block
selftests: mm: ksm: fix incorrect evaluation of parameter
hugetlb: do not clear hugetlb dtor until allocating vmemmap
mm: memory-failure: avoid false hwpoison page mapped error info
mm: memory-failure: fix potential unexpected return value from unpoison_memory()
mm/swapfile: fix wrong swap entry type for hwpoisoned swapcache page
radix tree test suite: fix incorrect allocation size for pthreads
crypto, cifs: fix error handling in extract_iter_to_sg()
zsmalloc: fix races between modifications of fullness and isolated
During NVMeTCP Authentication a controller can trigger a kernel
oops by specifying the 8192 bit Diffie Hellman group and passing
a correctly sized, but zeroed Diffie Hellamn value.
mpi_cmp_ui() was detecting this if the second parameter was 0,
but 1 is passed from dh_is_pubkey_valid(). This causes the null
pointer u->d to be dereferenced towards the end of mpi_cmp_ui()
Signed-off-by: Mark O'Donovan <shiftee@posteo.net>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
As lib/mpi is mostly used by crypto code, move it under lib/crypto
so that patches touching it get directed to the right mailing list.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
External tools, e.g., Intel GPU tools (IGT), support execution of
individual selftests provided by kernel modules. That could be also
applicable to kunit test modules if they provided test filtering. But
test filtering is now possible only when kunit code is built into the
kernel. Moreover, a filter can be specified only at boot time, then
reboot is required each time a different filter is needed.
Build the test filtering code also when kunit is configured as a module,
expose test filtering functions to other kunit source files, and use them
in kunit module notifier callback functions. Userspace can then reload
the kunit module with a value of the filter_glob parameter tuned to a
specific kunit test module every time it wants to limit the scope of tests
executed on that module load. Make the kunit.filter* parameters visible
in sysfs for user convenience.
v5: Refresh on tpp of attributes filtering fix
v4: Refresh on top of newly applied attributes patches and changes
introdced by new versions of other patches submitted in series with
this one.
v3: Fix CONFIG_GLOB, required by filtering functions, not selected when
building as a module (lkp@intel.com).
v2: Fix new name of a structure moved to kunit namespace not updated
across all uses (lkp@intel.com).
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Results from kunit tests reported via dmesg may be interleaved with other
kernel messages. When parsing dmesg for modular kunit results in real
time, external tools, e.g., Intel GPU tools (IGT), may want to insert
their own test name markers into dmesg at the start of each test, before
any kernel message related to that test appears there, so existing upper
level test result parsers have no doubt which test to blame for a specific
kernel message. Unfortunately, kunit reports names of tests only at their
completion (with the exeption of a not standarized "# Subtest: <name>"
header above a test plan of each test suite or parametrized test).
External tools could be able to insert their own "start of the test"
markers with test names included if they new those names in advance.
Test names could be learned from a list if provided by a kunit test
module.
There exists a feature of listing kunit tests without actually executing
them, but it is now limited to configurations with the kunit module built
in and covers only built-in tests, already available at boot time.
Moreover, switching from list to normal mode requires reboot. If that
feature was also available when kunit is built as a module, userspace
could load the module with action=list parameter, load some kunit test
modules they are interested in and learn about the list of tests provided
by those modules, then unload them, reload the kunit module in normal mode
and execute the tests with their lists already known.
Extend kunit module notifier initialization callback with a processing
path for only listing the tests provided by a module if the kunit action
parameter is set to "list" or "list_attr". For user convenience, make the
kunit.action parameter visible in sysfs.
v2: Don't use a different format, use kunit_exec_list_tests() (Rae),
- refresh on top of new attributes patches, handle newly introduced
kunit.action=list_attr case (Rae).
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Cc: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
According to KTAP specification[1], results should always start from a
header that provides a TAP protocol version, followed by a test plan with
a count of items to be executed. That pattern should be followed at each
nesting level. In the current implementation of the top-most, i.e., test
suite level, those rules apply only for test suites built into the kernel,
executed and reported on boot. Results submitted to dmesg from kunit test
modules loaded later are missing those top-level headers.
As a consequence, if a kunit test module provides more than one test suite
then, without the top level test plan, external tools that are parsing
dmesg for kunit test output are not able to tell how many test suites
should be expected and whether to continue parsing after complete output
from the first test suite is collected.
Submit the top-level headers also from the kunit test module notifier
initialization callback.
v3: Fix new name of a structure moved to kunit namespace not updated in
executor_test functions (lkp@intel.com).
v2: Use kunit_exec_run_tests() (Mauro, Rae), but prevent it from
emitting the headers when called on load of non-test modules.
[1] https://docs.kernel.org/dev-tools/ktap.html#
Signed-off-by: Janusz Krzysztofik <janusz.krzysztofik@linux.intel.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Rae Moar <rmoar@google.com>
Reviewed-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Two commits:
* The recently added cpu_intensive auto detection and warning mechanism was
spuriously triggered on slow CPUs. While not causing serious issues, it's
still a nuisance and can cause unintended concurrency management
behaviors. Relax the threshold on machines with lower BogoMIPS. While
BogoMIPS is not an accurate measure of performance by most measures, we
don't have to be accurate and it has rough but strong enough correlation.
* A correction in Kconfig help text.
-----BEGIN PGP SIGNATURE-----
iIQEABYIACwWIQTfIjM1kS57o3GsC/uxYfJx3gVYGQUCZNFMTQ4cdGpAa2VybmVs
Lm9yZwAKCRCxYfJx3gVYGb+4AQCniWx3rwWWmLgviPR0AfYWbcQ8/P/qGh++fmsR
tEF3sQD/bLdeWcVa1pSzXjhGtRVGsTis6oOhk81A0zIZlx0v2Qg=
=sThu
-----END PGP SIGNATURE-----
Merge tag 'wq-for-6.5-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq
Pull workqueue fixes from Tejun Heo:
- The recently added cpu_intensive auto detection and warning mechanism
was spuriously triggered on slow CPUs.
While not causing serious issues, it's still a nuisance and can cause
unintended concurrency management behaviors.
Relax the threshold on machines with lower BogoMIPS. While BogoMIPS
is not an accurate measure of performance by most measures, we don't
have to be accurate and it has rough but strong enough correlation.
- A correction in Kconfig help text
* tag 'wq-for-6.5-rc5-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq:
workqueue: Scale up wq_cpu_intensive_thresh_us if BogoMIPS is below 4000
workqueue: Fix cpu_intensive_thresh_us name in help text
There are too many "(type > KOBJ_NS_TYPE_NONE) && (type < KOBJ_NS_TYPES)"
and "(type <= KOBJ_NS_TYPE_NONE) || (type >= KOBJ_NS_TYPES)", add helper
kobj_ns_type_is_valid() to eliminate duplicate code and improve
readability.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20230726062508.950-1-thunder.leizhen@huaweicloud.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Duplicate a NULL-terminated string and replace all occurrences of
the old character with a new one. In other words, provide functionality
of kstrdup() + strreplace().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230804143910.15504-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Fix smatch warnings regarding uninitialized variables in the filtering
patch of the new KUnit Attributes feature.
Fixes: 529534e8cb ("kunit: Add ability to filter attributes")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202307270610.s0w4NKEn-lkp@intel.com/
Signed-off-by: Rae Moar <rmoar@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Printing the line number without the file is of limited usefulness.
Knowing the filename also makes it also easier to relate the logged
information to the controlfile.
Example:
# modprobe test_dynamic_debug
# echo 'file test_dynamic_debug.c =pfsl' > /proc/dynamic_debug/control
# echo 1 > /sys/module/test_dynamic_debug/parameters/do_prints
# dmesg | tail -2
[ 71.802212] do_cats:lib/test_dynamic_debug.c:103: test_dd: doing categories
[ 71.802227] do_levels:lib/test_dynamic_debug.c:123: test_dd: doing levels
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Jim Cromie <jim.cromie@gmail.com>
Acked-by: Jason Baron <jbaron@akamai.com>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20230709-dyndbg-filename-v2-3-fd83beef0925@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
A follow-up patch will add the possibility to print the filename as part
of the prefix.
Increase the maximum prefix size to accommodate this.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20230709-dyndbg-filename-v2-2-fd83beef0925@weissschuh.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- Fix for bitmap documentation;
- Fix for kernel build under certain configuration.
-----BEGIN PGP SIGNATURE-----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=5IbU
-----END PGP SIGNATURE-----
Merge tag 'bitmap-6.5-rc5' of https://github.com:/norov/linux
Pull bitmap fixes from Yury Norov:
- Fix for bitmap documentation
- Fix for kernel build under certain configurations
* tag 'bitmap-6.5-rc5' of https://github.com:/norov/linux:
lib/bitmap: workaround const_eval test build failure
cpumask: eliminate kernel-doc warnings
Here is a char driver fix and some documentation updates for 6.5-rc4
that contain the following changes:
- sram/genalloc bugfix for reported problem
- security-bugs.rst update based on recent discussions
- embargoed-hardware-issues minor cleanups and then partial revert for
the project/company lists
All of these have been in linux-next for a while with no reported
problems, and the documentation updates have all been reviewed by the
relevant developers.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-----BEGIN PGP SIGNATURE-----
iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCZMZD6A8cZ3JlZ0Brcm9h
aC5jb20ACgkQMUfUDdst+ynxZACgksV7C7yJWTm9UfZNZ2ABUhj69aEAnR/X9tLr
Sjtjo0iaoAZpE+2tjHt1
=J/gW
-----END PGP SIGNATURE-----
Merge tag 'char-misc-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char driver and Documentation fixes from Greg KH:
"Here is a char driver fix and some documentation updates for 6.5-rc4
that contain the following changes:
- sram/genalloc bugfix for reported problem
- security-bugs.rst update based on recent discussions
- embargoed-hardware-issues minor cleanups and then partial revert
for the project/company lists
All of these have been in linux-next for a while with no reported
problems, and the documentation updates have all been reviewed by the
relevant developers"
* tag 'char-misc-6.5-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
misc/genalloc: Name subpools by of_node_full_name()
Documentation: embargoed-hardware-issues.rst: add AMD to the list
Documentation: embargoed-hardware-issues.rst: clean out empty and unused entries
Documentation: security-bugs.rst: clarify CVE handling
Documentation: security-bugs.rst: update preferences when dealing with the linux-distros group
It is possible for xa_load() to observe a sibling entry pointing to
another sibling entry. An example:
Thread A: Thread B:
xa_store_range(xa, entry, 188, 191, gfp);
xa_load(xa, 191);
entry = xa_entry(xa, node, 63);
[entry is a sibling of 188]
xa_store_range(xa, entry, 184, 191, gfp);
if (xa_is_sibling(entry))
offset = xa_to_sibling(entry);
entry = xa_entry(xas->xa, node, offset);
[entry is now a sibling of 184]
It is sufficient to go around this loop until we hit a non-sibling entry.
Sibling entries always point earlier in the node, so we are guaranteed
to terminate this search.
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Fixes: 6b24ca4a1a ("mm: Use multi-index entries in the page cache")
Cc: stable@vger.kernel.org
-----BEGIN PGP SIGNATURE-----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=fgLz
-----END PGP SIGNATURE-----
Merge tag 'nf-next-23-07-27' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next
Florian Westphal says:
====================
netfilter updates for net-next
1. silence a harmless warning for CONFIG_NF_CONNTRACK_PROCFS=n builds,
from Zhu Wang.
2, 3:
Allow NLA_POLICY_MASK to be used with BE16/BE32 types, and replace a few
manual checks with nla_policy based one in nf_tables, from myself.
4: cleanup in ctnetlink to validate while parsing rather than
using two steps, from Lin Ma.
5: refactor boyer-moore textsearch by moving a small chunk to
a helper function, rom Jeremy Sowden.
* tag 'nf-next-23-07-27' of https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf-next:
lib/ts_bm: add helper to reduce indentation and improve readability
netfilter: conntrack: validate cta_ip via parsing
netfilter: nf_tables: use NLA_POLICY_MASK to test for valid flag options
netlink: allow be16 and be32 types in all uint policy checks
nf_conntrack: fix -Wunused-const-variable=
====================
Link: https://lore.kernel.org/r/20230727133604.8275-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The flow-control of `bm_find` is very deeply nested with a conditional
comparing a ternary expression against the pattern inside a for-loop
inside a while-loop inside a for-loop.
Move the inner for-loop into a helper function to reduce the amount of
indentation and make the code easier to read.
Fix indentation and trailing white-space in preceding debug logging
statement.
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
__NLA_IS_BEINT_TYPE(tp) isn't useful. NLA_BE16/32 are identical to
NLA_U16/32, the only difference is that it tells the netlink validation
functions that byteorder conversion might be needed before comparing
the value to the policy min/max ones.
After this change all policy macros that can be used with UINT types,
such as NLA_POLICY_MASK() can also be used with NLA_BE16/32.
This will be used to validate nf_tables flag attributes which
are in bigendian byte order.
Signed-off-by: Florian Westphal <fw@strlen.de>
Add four tests to executor_test.c to test behavior of filtering attributes.
- parse_filter_attr_test - to test the parsing of inputted filters
- filter_attr_test - to test the filtering procedure on attributes
- filter_attr_empty_test - to test the behavior when all tests are filtered
out
- filter_attr_skip_test - to test the configurable filter_action=skip
option
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Mark slow memcpy KUnit tests using test attributes.
Tests marked as slow are as follows: memcpy_large_test, memmove_test,
memmove_large_test, and memmove_overlap_test. These tests were the slowest
of the memcpy tests and relatively slower to most other KUnit tests. Most
of these tests are already skipped when CONFIG_MEMCPY_SLOW_KUNIT_TEST is
not enabled.
These tests can now be filtered using the KUnit test attribute filtering
feature. Example: --filter "speed>slow". This will run only the tests that
have speeds faster than slow. The slow attribute will also be outputted in
KTAP.
Note: This patch is intended to replace the use of
CONFIG_MEMCPY_SLOW_KUNIT_TEST and to potentially deprecate this feature.
This patch does not remove the config option but does add a note to the
config definition commenting on this future shift.
Reviewed-by: David Gow <davidgow@google.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add filtering of test attributes. Users can filter tests using the
module_param called "filter".
Filters are imputed in the format: <attribute_name><operation><value>
Example: kunit.filter="speed>slow"
Operations include: >, <, >=, <=, !=, and =. These operations will act the
same for attributes of the same type but may not between types.
Note multiple filters can be inputted by separating them with a comma.
Example: kunit.filter="speed=slow, module!=example"
Since both suites and test cases can have attributes, there may be
conflicts. The process of filtering follows these rules:
- Filtering always operates at a per-test level.
- If a test has an attribute set, then the test's value is filtered on.
- Otherwise, the value falls back to the suite's value.
- If neither are set, the attribute has a global "default" value, which
is used.
Filtered tests will not be run or show in output. The tests can instead be
skipped using the configurable option "kunit.filter_action=skip".
Note the default settings for running tests remains unfiltered.
Finally, add "filter" methods for the speed and module attributes to parse
and compare attribute values.
Note this filtering functionality will be added to kunit.py in the next
patch.
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add module attribute to the test attribute API. This attribute stores the
module name associated with the test using KBUILD_MODNAME.
The name of a test suite and the module name often do not match. A
reference to the module name associated with the suite could be extremely
helpful in running tests as modules without needing to check the codebase.
This attribute will be printed for each suite.
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add speed attribute to the test attribute API. This attribute will allow
users to mark tests with a category of speed.
Currently the categories of speed proposed are: normal, slow, and very_slow
(outlined in enum kunit_speed). These are outlined in the enum kunit_speed.
The assumed default speed for tests is "normal". This indicates that the
test takes a relatively trivial amount of time (less than 1 second),
regardless of the machine it is running on. Any test slower than this could
be marked as "slow" or "very_slow".
Add the macro KUNIT_CASE_SLOW to set a test as slow, as this is likely a
common use of the attributes API.
Add an example of marking a slow test to kunit-example-test.c.
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Add the basic structure of the test attribute API to KUnit, which can be
used to save and access test associated data.
Add attributes.c and attributes.h to hold associated structs and functions
for the API.
Create a struct that holds a variety of associated helper functions for
each test attribute. These helper functions will be used to get the
attribute value, convert the value to a string, and filter based on the
value. This struct is flexible by design to allow for attributes of
numerous types and contexts.
Add a method to print test attributes in the format of "# [<test_name if
not suite>.]<attribute_name>: <attribute_value>".
Example for a suite: "# speed: slow"
Example for a test case: "# test_case.speed: very_slow"
Use this method to report attributes in the KTAP output (KTAP spec:
https://docs.kernel.org/dev-tools/ktap.html) and _list_tests output when
kernel's new kunit.action=list_attr option is used. Note this is derivative
of the kunit.action=list option.
In test.h, add fields and associated helper functions to test cases and
suites to hold user-inputted test attributes.
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Rae Moar <rmoar@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
The "__cleanup__" attribute is already used for wait context tests, so
using it for locking tests has already been proven working. Now since
SBRM APIs are merged, let's use these APIs instead of a local guard
framework. This also helps testing SBRM APIs.
Note that originally the tests don't rely on the cleanup ordering of
two variables in the same scope, but since now it's something we'd like
to assume and rely on[1], drop the extra scope in inner_in_outer()
function. Again this gives us another opportunity to test the compiler
behavior.
[1]: https://lore.kernel.org/lkml/CAHk-=whEsr6fuVSdsoNPokLR2fZiGuo_hCLyrS-LCw7hT_N7cQ@mail.gmail.com/
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230715235257.110325-1-boqun.feng@gmail.com
Jakub Kicinski