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Frederic Weisbecker ae4f109b95 tick: Detect and fix jiffies update stall 
commit a1ff03cd6f upstream.

On some rare cases, the timekeeper CPU may be delaying its jiffies
update duty for a while. Known causes include:

* The timekeeper is waiting on stop_machine in a MULTI_STOP_DISABLE_IRQ
  or MULTI_STOP_RUN state. Disabled interrupts prevent from timekeeping
  updates while waiting for the target CPU to complete its
  stop_machine() callback.

* The timekeeper vcpu has VMEXIT'ed for a long while due to some overload
  on the host.

Detect and fix these situations with emergency timekeeping catchups.

Original-patch-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-08-30 16:23:17 +02:00
arch x86/fpu: Set X86_FEATURE_OSXSAVE feature after enabling OSXSAVE in CR4 2023-08-30 16:23:17 +02:00
block block/partition: fix signedness issue for Amiga partitions 2023-07-27 08:44:18 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:13:17 +02:00
crypto KEYS: asymmetric: Copy sig and digest in public_key_verify_signature() 2023-06-09 10:30:17 +02:00
Documentation x86/cpu: Rename srso_(.*)_alias to srso_alias_\1 2023-08-26 15:26:57 +02:00
drivers drm/vmwgfx: Fix shader stage validation 2023-08-30 16:23:16 +02:00
fs nfsd: Fix race to FREE_STATEID and cl_revoked 2023-08-30 16:23:15 +02:00
include drm/display/dp: Fix the DP DSC Receiver cap size 2023-08-30 16:23:16 +02:00
init x86/mm: Initialize text poking earlier 2023-08-08 19:57:39 +02:00
io_uring io_uring: correct check for O_TMPFILE 2023-08-16 18:21:00 +02:00
ipc ipc/sem: Fix dangling sem_array access in semtimedop race 2022-12-08 11:24:00 +01:00
kernel tick: Detect and fix jiffies update stall 2023-08-30 16:23:17 +02:00
lib radix tree: remove unused variable 2023-08-30 16:23:16 +02:00
LICENSES
mm mm: add a call to flush_cache_vmap() in vmap_pfn() 2023-08-30 16:23:14 +02:00
net batman-adv: Hold rtnl lock during MTU update via netlink 2023-08-30 16:23:16 +02:00
samples samples: ftrace: Save required argument registers in sample trampolines 2023-07-27 08:44:31 +02:00
scripts modpost: fix off by one in is_executable_section() 2023-07-27 08:44:00 +02:00
security selinux: set next pointer before attaching to list 2023-08-30 16:23:15 +02:00
sound ALSA: pcm: Fix potential data race at PCM memory allocation helpers 2023-08-30 16:23:11 +02:00
tools objtool/x86: Fix SRSO mess 2023-08-30 16:23:09 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:25:48 +01:00
virt KVM: fix memoryleak in kvm_init() 2023-04-05 11:23:43 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore kbuild: generate Module.symvers only when vmlinux exists 2021-05-19 10:12:59 +02:00
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Remove DECnet support from kernel 2023-06-21 15:45:38 +02:00
Makefile Linux 5.10.192 2023-08-26 15:26:59 +02:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.