linux-stable/kernel
Linus Torvalds 3cb9871f81 Urgent RCU pull request for v6.8
This commit fixes RCU grace period stalls, which are observed when
 an outgoing CPU's quiescent state reporting results in wakeup of
 one of the grace period kthreads, to complete the grace period. If
 those kthreads have SCHED_FIFO policy, the wake up can indirectly
 arm the RT bandwith timer to the local offline CPU. Earlier migration
 of the hrtimers from the CPU introduced in commit 5c0930ccaa
 ("hrtimers: Push pending hrtimers away from outgoing CPU earlier")
 results in this timer getting ignored. If the RCU grace period
 kthreads are waiting for RT bandwidth to be available, they may
 never be actually scheduled, resulting in RCU stall warnings.
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Merge tag 'urgent-rcu.2024.01.24a' of https://github.com/neeraju/linux

Pull RCU fix from Neeraj Upadhyay:
 "This fixes RCU grace period stalls, which are observed when an
  outgoing CPU's quiescent state reporting results in wakeup of one of
  the grace period kthreads, to complete the grace period.

  If those kthreads have SCHED_FIFO policy, the wake up can indirectly
  arm the RT bandwith timer to the local offline CPU.

  Earlier migration of the hrtimers from the CPU introduced in commit
  5c0930ccaa ("hrtimers: Push pending hrtimers away from outgoing CPU
  earlier") results in this timer getting ignored.

  If the RCU grace period kthreads are waiting for RT bandwidth to be
  available, they may never be actually scheduled, resulting in RCU
  stall warnings"

* tag 'urgent-rcu.2024.01.24a' of https://github.com/neeraju/linux:
  rcu: Defer RCU kthreads wakeup when CPU is dying
2024-01-25 10:21:21 -08:00
..
bpf bpf: enforce types for __arg_ctx-tagged arguments in global subprogs 2024-01-17 20:20:06 -08:00
cgroup Driver core changes for 6.8-rc1 2024-01-18 09:48:40 -08:00
configs
debug kdb: Fix a potential buffer overflow in kdb_local() 2024-01-17 17:19:06 +00:00
dma dma-mapping fixes for Linux 6.8 2024-01-18 16:49:34 -08:00
entry
events Many singleton patches against the MM code. The patch series which 2024-01-09 11:18:47 -08:00
futex
gcov
irq
kcsan
livepatch
locking RCU pull request for v6.8 2024-01-12 16:35:58 -08:00
module Modules changes for v6.8-rc1 2024-01-10 18:00:18 -08:00
power
printk
rcu rcu: Defer RCU kthreads wakeup when CPU is dying 2024-01-24 22:46:17 +05:30
sched Fix a cpufreq related performance regression on certain systems, 2024-01-18 11:57:33 -08:00
time Updates for time and clocksources: 2024-01-21 11:14:40 -08:00
trace tracing: Ensure visibility when inserting an element into tracing_map 2024-01-22 17:15:40 -05:00
.gitignore
Kconfig.freezer
Kconfig.hz
Kconfig.kexec
Kconfig.locks
Kconfig.preempt
Makefile
acct.c
async.c header cleanups for 6.8 2024-01-10 16:43:55 -08:00
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
cfi.c
compat.c
configs.c
context_tracking.c
cpu.c slab updates for 6.8 2024-01-09 10:36:07 -08:00
cpu_pm.c
crash_core.c kernel/crash_core.c: make __crash_hotplug_lock static 2024-01-12 15:20:47 -08:00
crash_dump.c
cred.c
delayacct.c
dma.c
exec_domain.c
exit.c header cleanups for 6.8 2024-01-10 16:43:55 -08:00
exit.h
extable.c
fail_function.c
fork.c exec: Distinguish in_execve from in_exec 2024-01-24 11:48:52 -08:00
freezer.c
gen_kheaders.sh
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c
kallsyms.c
kallsyms_internal.h
kallsyms_selftest.c
kallsyms_selftest.h
kcmp.c
kcov.c
kexec.c
kexec_core.c kexec: do syscore_shutdown() in kernel_kexec 2024-01-12 15:20:47 -08:00
kexec_elf.c
kexec_file.c
kexec_internal.h
kheaders.c
kprobes.c
ksyms_common.c
ksysfs.c
kthread.c
latencytop.c
module_signature.c
notifier.c
nsproxy.c
numa.c
padata.c
panic.c
params.c
pid.c
pid_namespace.c
pid_sysctl.h
profile.c
ptrace.c Quite a lot of kexec work this time around. Many singleton patches in 2024-01-09 11:46:20 -08:00
range.c
reboot.c Thermal control updates for 6.8-rc1 2024-01-09 16:20:17 -08:00
regset.c
relay.c
resource.c Quite a lot of kexec work this time around. Many singleton patches in 2024-01-09 11:46:20 -08:00
resource_kunit.c
rseq.c
scftorture.c
scs.c
seccomp.c
signal.c
smp.c
smpboot.c
smpboot.h
softirq.c
stackleak.c
stacktrace.c
static_call.c
static_call_inline.c
stop_machine.c
sys.c
sys_ni.c lsm/stable-6.8 PR 20240105 2024-01-09 12:57:46 -08:00
sysctl-test.c
sysctl.c
task_work.c
taskstats.c
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user-return-notifier.c
user.c
user_namespace.c
usermode_driver.c
utsname.c
utsname_sysctl.c
vhost_task.c
watch_queue.c
watchdog.c
watchdog_buddy.c
watchdog_perf.c
workqueue.c
workqueue_internal.h