mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Linus Torvalds](/assets/img/avatar_default.png)
switching from a user process to a kernel thread. - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj Raghav. - zsmalloc performance improvements from Sergey Senozhatsky. - Yue Zhao has found and fixed some data race issues around the alteration of memcg userspace tunables. - VFS rationalizations from Christoph Hellwig: - removal of most of the callers of write_one_page(). - make __filemap_get_folio()'s return value more useful - Luis Chamberlain has changed tmpfs so it no longer requires swap backing. Use `mount -o noswap'. - Qi Zheng has made the slab shrinkers operate locklessly, providing some scalability benefits. - Keith Busch has improved dmapool's performance, making part of its operations O(1) rather than O(n). - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd, permitting userspace to wr-protect anon memory unpopulated ptes. - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive rather than exclusive, and has fixed a bunch of errors which were caused by its unintuitive meaning. - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature, which causes minor faults to install a write-protected pte. - Vlastimil Babka has done some maintenance work on vma_merge(): cleanups to the kernel code and improvements to our userspace test harness. - Cleanups to do_fault_around() by Lorenzo Stoakes. - Mike Rapoport has moved a lot of initialization code out of various mm/ files and into mm/mm_init.c. - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for DRM, but DRM doesn't use it any more. - Lorenzo has also coverted read_kcore() and vread() to use iterators and has thereby removed the use of bounce buffers in some cases. - Lorenzo has also contributed further cleanups of vma_merge(). - Chaitanya Prakash provides some fixes to the mmap selftesting code. - Matthew Wilcox changes xfs and afs so they no longer take sleeping locks in ->map_page(), a step towards RCUification of pagefaults. - Suren Baghdasaryan has improved mmap_lock scalability by switching to per-VMA locking. - Frederic Weisbecker has reworked the percpu cache draining so that it no longer causes latency glitches on cpu isolated workloads. - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig logic. - Liu Shixin has changed zswap's initialization so we no longer waste a chunk of memory if zswap is not being used. - Yosry Ahmed has improved the performance of memcg statistics flushing. - David Stevens has fixed several issues involving khugepaged, userfaultfd and shmem. - Christoph Hellwig has provided some cleanup work to zram's IO-related code paths. - David Hildenbrand has fixed up some issues in the selftest code's testing of our pte state changing. - Pankaj Raghav has made page_endio() unneeded and has removed it. - Peter Xu contributed some rationalizations of the userfaultfd selftests. - Yosry Ahmed has fixed an issue around memcg's page recalim accounting. - Chaitanya Prakash has fixed some arm-related issues in the selftests/mm code. - Longlong Xia has improved the way in which KSM handles hwpoisoned pages. - Peter Xu fixes a few issues with uffd-wp at fork() time. - Stefan Roesch has changed KSM so that it may now be used on a per-process and per-cgroup basis. -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCZEr3zQAKCRDdBJ7gKXxA jlLoAP0fpQBipwFxED0Us4SKQfupV6z4caXNJGPeay7Aj11/kQD/aMRC2uPfgr96 eMG3kwn2pqkB9ST2QpkaRbxA//eMbQY= =J+Dj -----END PGP SIGNATURE----- Merge tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - Nick Piggin's "shoot lazy tlbs" series, to improve the peformance of switching from a user process to a kernel thread. - More folio conversions from Kefeng Wang, Zhang Peng and Pankaj Raghav. - zsmalloc performance improvements from Sergey Senozhatsky. - Yue Zhao has found and fixed some data race issues around the alteration of memcg userspace tunables. - VFS rationalizations from Christoph Hellwig: - removal of most of the callers of write_one_page() - make __filemap_get_folio()'s return value more useful - Luis Chamberlain has changed tmpfs so it no longer requires swap backing. Use `mount -o noswap'. - Qi Zheng has made the slab shrinkers operate locklessly, providing some scalability benefits. - Keith Busch has improved dmapool's performance, making part of its operations O(1) rather than O(n). - Peter Xu adds the UFFD_FEATURE_WP_UNPOPULATED feature to userfaultd, permitting userspace to wr-protect anon memory unpopulated ptes. - Kirill Shutemov has changed MAX_ORDER's meaning to be inclusive rather than exclusive, and has fixed a bunch of errors which were caused by its unintuitive meaning. - Axel Rasmussen give userfaultfd the UFFDIO_CONTINUE_MODE_WP feature, which causes minor faults to install a write-protected pte. - Vlastimil Babka has done some maintenance work on vma_merge(): cleanups to the kernel code and improvements to our userspace test harness. - Cleanups to do_fault_around() by Lorenzo Stoakes. - Mike Rapoport has moved a lot of initialization code out of various mm/ files and into mm/mm_init.c. - Lorenzo Stoakes removd vmf_insert_mixed_prot(), which was added for DRM, but DRM doesn't use it any more. - Lorenzo has also coverted read_kcore() and vread() to use iterators and has thereby removed the use of bounce buffers in some cases. - Lorenzo has also contributed further cleanups of vma_merge(). - Chaitanya Prakash provides some fixes to the mmap selftesting code. - Matthew Wilcox changes xfs and afs so they no longer take sleeping locks in ->map_page(), a step towards RCUification of pagefaults. - Suren Baghdasaryan has improved mmap_lock scalability by switching to per-VMA locking. - Frederic Weisbecker has reworked the percpu cache draining so that it no longer causes latency glitches on cpu isolated workloads. - Mike Rapoport cleans up and corrects the ARCH_FORCE_MAX_ORDER Kconfig logic. - Liu Shixin has changed zswap's initialization so we no longer waste a chunk of memory if zswap is not being used. - Yosry Ahmed has improved the performance of memcg statistics flushing. - David Stevens has fixed several issues involving khugepaged, userfaultfd and shmem. - Christoph Hellwig has provided some cleanup work to zram's IO-related code paths. - David Hildenbrand has fixed up some issues in the selftest code's testing of our pte state changing. - Pankaj Raghav has made page_endio() unneeded and has removed it. - Peter Xu contributed some rationalizations of the userfaultfd selftests. - Yosry Ahmed has fixed an issue around memcg's page recalim accounting. - Chaitanya Prakash has fixed some arm-related issues in the selftests/mm code. - Longlong Xia has improved the way in which KSM handles hwpoisoned pages. - Peter Xu fixes a few issues with uffd-wp at fork() time. - Stefan Roesch has changed KSM so that it may now be used on a per-process and per-cgroup basis. * tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (369 commits) mm,unmap: avoid flushing TLB in batch if PTE is inaccessible shmem: restrict noswap option to initial user namespace mm/khugepaged: fix conflicting mods to collapse_file() sparse: remove unnecessary 0 values from rc mm: move 'mmap_min_addr' logic from callers into vm_unmapped_area() hugetlb: pte_alloc_huge() to replace huge pte_alloc_map() maple_tree: fix allocation in mas_sparse_area() mm: do not increment pgfault stats when page fault handler retries zsmalloc: allow only one active pool compaction context selftests/mm: add new selftests for KSM mm: add new KSM process and sysfs knobs mm: add new api to enable ksm per process mm: shrinkers: fix debugfs file permissions mm: don't check VMA write permissions if the PTE/PMD indicates write permissions migrate_pages_batch: fix statistics for longterm pin retry userfaultfd: use helper function range_in_vma() lib/show_mem.c: use for_each_populated_zone() simplify code mm: correct arg in reclaim_pages()/reclaim_clean_pages_from_list() fs/buffer: convert create_page_buffers to folio_create_buffers fs/buffer: add folio_create_empty_buffers helper ...
291 lines
8.9 KiB
Text
291 lines
8.9 KiB
Text
# SPDX-License-Identifier: GPL-2.0-only
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menuconfig SAMPLES
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bool "Sample kernel code"
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help
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You can build and test sample kernel code here.
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if SAMPLES
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config SAMPLE_AUXDISPLAY
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bool "auxdisplay sample"
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depends on CC_CAN_LINK
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config SAMPLE_TRACE_EVENTS
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tristate "Build trace_events examples -- loadable modules only"
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depends on EVENT_TRACING && m
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help
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This builds the trace event example module.
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config SAMPLE_TRACE_CUSTOM_EVENTS
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tristate "Build custom trace event example -- loadable modules only"
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depends on EVENT_TRACING && m
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help
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This builds the custom trace event example module.
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config SAMPLE_TRACE_PRINTK
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tristate "Build trace_printk module - tests various trace_printk formats"
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depends on EVENT_TRACING && m
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help
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This builds a module that calls trace_printk() and can be used to
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test various trace_printk() calls from a module.
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config SAMPLE_FTRACE_DIRECT
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tristate "Build register_ftrace_direct() example"
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depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS && m
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depends on HAVE_SAMPLE_FTRACE_DIRECT
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help
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This builds an ftrace direct function example
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that hooks to wake_up_process and prints the parameters.
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config SAMPLE_FTRACE_DIRECT_MULTI
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tristate "Build register_ftrace_direct() on multiple ips example"
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depends on DYNAMIC_FTRACE_WITH_DIRECT_CALLS && m
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depends on HAVE_SAMPLE_FTRACE_DIRECT_MULTI
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help
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This builds an ftrace direct function example
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that hooks to wake_up_process and schedule, and prints
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the function addresses.
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config SAMPLE_FTRACE_OPS
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tristate "Build custom ftrace ops example"
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depends on FUNCTION_TRACER
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help
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This builds an ftrace ops example that hooks two functions and
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measures the time taken to invoke one function a number of times.
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config SAMPLE_TRACE_ARRAY
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tristate "Build sample module for kernel access to Ftrace instancess"
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depends on EVENT_TRACING && m
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help
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This builds a module that demonstrates the use of various APIs to
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access Ftrace instances from within the kernel.
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config SAMPLE_KOBJECT
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tristate "Build kobject examples"
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help
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This config option will allow you to build a number of
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different kobject sample modules showing how to use kobjects,
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ksets, and ktypes properly.
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If in doubt, say "N" here.
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config SAMPLE_KPROBES
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tristate "Build kprobes examples -- loadable modules only"
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depends on KPROBES && m
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help
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This build several kprobes example modules.
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config SAMPLE_KRETPROBES
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tristate "Build kretprobes example -- loadable modules only"
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default m
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depends on SAMPLE_KPROBES && KRETPROBES
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config SAMPLE_HW_BREAKPOINT
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tristate "Build kernel hardware breakpoint examples -- loadable module only"
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depends on HAVE_HW_BREAKPOINT && m
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help
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This builds kernel hardware breakpoint example modules.
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config SAMPLE_FPROBE
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tristate "Build fprobe examples -- loadable modules only"
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depends on FPROBE && m
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help
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This builds a fprobe example module. This module has an option 'symbol'.
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You can specify a probed symbol or symbols separated with ','.
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config SAMPLE_KFIFO
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tristate "Build kfifo examples -- loadable modules only"
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depends on m
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help
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This config option will allow you to build a number of
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different kfifo sample modules showing how to use the
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generic kfifo API.
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If in doubt, say "N" here.
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config SAMPLE_KDB
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tristate "Build kdb command example -- loadable modules only"
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depends on KGDB_KDB && m
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help
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Build an example of how to dynamically add the hello
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command to the kdb shell.
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config SAMPLE_QMI_CLIENT
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tristate "Build qmi client sample -- loadable modules only"
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depends on m
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depends on ARCH_QCOM
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depends on NET
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select QCOM_QMI_HELPERS
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help
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Build an QMI client sample driver, which demonstrates how to
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communicate with a remote QRTR service, using QMI encoded messages.
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config SAMPLE_RPMSG_CLIENT
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tristate "Build rpmsg client sample -- loadable modules only"
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depends on RPMSG && m
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help
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Build an rpmsg client sample driver, which demonstrates how
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to communicate with an AMP-configured remote processor over
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the rpmsg bus.
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config SAMPLE_LIVEPATCH
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tristate "Build live patching samples -- loadable modules only"
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depends on LIVEPATCH && m
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help
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Build sample live patch demonstrations.
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config SAMPLE_CONFIGFS
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tristate "Build configfs patching sample -- loadable modules only"
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depends on CONFIGFS_FS && m
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help
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Builds a sample configfs interface.
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config SAMPLE_CONNECTOR
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tristate "Build connector sample -- loadable modules only"
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depends on CONNECTOR && HEADERS_INSTALL && m
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help
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When enabled, this builds both a sample kernel module for
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the connector interface and a user space tool to communicate
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with it.
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See also Documentation/driver-api/connector.rst
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config SAMPLE_FANOTIFY_ERROR
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bool "Build fanotify error monitoring sample"
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depends on FANOTIFY && CC_CAN_LINK && HEADERS_INSTALL
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help
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When enabled, this builds an example code that uses the
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FAN_FS_ERROR fanotify mechanism to monitor filesystem
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errors.
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See also Documentation/admin-guide/filesystem-monitoring.rst.
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config SAMPLE_HIDRAW
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bool "hidraw sample"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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config SAMPLE_LANDLOCK
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bool "Landlock example"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build a simple Landlock sandbox manager able to start a process
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restricted by a user-defined filesystem access control policy.
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config SAMPLE_PIDFD
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bool "pidfd sample"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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config SAMPLE_SECCOMP
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bool "Build seccomp sample code"
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depends on SECCOMP_FILTER && CC_CAN_LINK && HEADERS_INSTALL
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help
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Build samples of seccomp filters using various methods of
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BPF filter construction.
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config SAMPLE_TIMER
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bool "Timer sample"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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config SAMPLE_UHID
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bool "UHID sample"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build UHID sample program.
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config SAMPLE_VFIO_MDEV_MTTY
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tristate "Build VFIO mtty example mediated device sample code"
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depends on VFIO
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select VFIO_MDEV
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help
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Build a virtual tty sample driver for use as a VFIO
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mediated device
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config SAMPLE_VFIO_MDEV_MDPY
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tristate "Build VFIO mdpy example mediated device sample code"
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depends on VFIO
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select VFIO_MDEV
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help
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Build a virtual display sample driver for use as a VFIO
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mediated device. It is a simple framebuffer and supports
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the region display interface (VFIO_GFX_PLANE_TYPE_REGION).
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config SAMPLE_VFIO_MDEV_MDPY_FB
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tristate "Build VFIO mdpy example guest fbdev driver"
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depends on FB
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select FB_CFB_FILLRECT
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select FB_CFB_COPYAREA
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select FB_CFB_IMAGEBLIT
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help
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Guest fbdev driver for the virtual display sample driver.
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config SAMPLE_VFIO_MDEV_MBOCHS
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tristate "Build VFIO mbochs example mediated device sample code"
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depends on VFIO
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select VFIO_MDEV
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select DMA_SHARED_BUFFER
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help
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Build a virtual display sample driver for use as a VFIO
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mediated device. It supports the region display interface
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(VFIO_GFX_PLANE_TYPE_DMABUF).
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Emulate enough of qemu stdvga to make bochs-drm.ko happy.
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That is basically the vram memory bar and the bochs dispi
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interface vbe registers in the mmio register bar.
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Specifically it does *not* include any legacy vga stuff.
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Device looks a lot like "qemu -device secondary-vga".
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config SAMPLE_ANDROID_BINDERFS
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bool "Build Android binderfs example"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Builds a sample program to illustrate the use of the Android binderfs
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filesystem.
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config SAMPLE_VFS
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bool "Build example programs that use new VFS system calls"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build example userspace programs that use new VFS system calls such
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as mount API and statx(). Note that this is restricted to the x86
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arch whilst it accesses system calls that aren't yet in all arches.
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config SAMPLE_INTEL_MEI
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bool "Build example program working with intel mei driver"
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depends on INTEL_MEI
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build a sample program to work with mei device.
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config SAMPLE_WATCHDOG
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bool "watchdog sample"
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depends on CC_CAN_LINK
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config SAMPLE_WATCH_QUEUE
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bool "Build example watch_queue notification API consumer"
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depends on CC_CAN_LINK && HEADERS_INSTALL
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help
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Build example userspace program to use the new mount_notify(),
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sb_notify() syscalls and the KEYCTL_WATCH_KEY keyctl() function.
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config SAMPLE_CORESIGHT_SYSCFG
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tristate "Build example loadable module for CoreSight config"
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depends on CORESIGHT && m
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help
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Build an example loadable module that adds new CoreSight features
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and configuration using the CoreSight system configuration API.
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This demonstrates how a user may create their own CoreSight
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configurations and easily load them into the system at runtime.
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config SAMPLE_KMEMLEAK
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tristate "Simple test for the kernel memory leak detector"
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depends on DEBUG_KMEMLEAK && m
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help
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Build a sample program which have explicitly leaks memory to test
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kmemleak
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source "samples/rust/Kconfig"
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endif # SAMPLES
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config HAVE_SAMPLE_FTRACE_DIRECT
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bool
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config HAVE_SAMPLE_FTRACE_DIRECT_MULTI
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bool
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