Linus Torvalds 944d5fe50f sched/membarrier: reduce the ability to hammer on sys_membarrier ... On some systems, sys_membarrier can be very expensive, causing overall slowdowns for everything. So put a lock on the path in order to serialize the accesses to prevent the ability for this to be called at too high of a frequency and saturate the machine. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Reviewed-and-tested-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Acked-by: Borislav Petkov <bp@alien8.de> Fixes: 22e4ebb975 ("membarrier: Provide expedited private command") Fixes: c5f58bd58f ("membarrier: Provide GLOBAL_EXPEDITED command") Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2024-02-20 09:38:05 -08:00
..
autogroup.c	sched/all: Change all BUG_ON() instances in the scheduler to WARN_ON_ONCE()	2022-08-12 11:25:10 +02:00
autogroup.h
build_policy.c	sched: Fix missing prototype warnings	2022-05-01 10:03:43 +02:00
build_utility.c	sched/headers: Remove duplicate header inclusions	2023-10-03 21:27:55 +02:00
clock.c	Locking changes for v6.5:	2023-06-27 14:14:30 -07:00
completion.c	sched: add a few helpers to wake up tasks on the current cpu	2023-07-17 16:08:08 -07:00
core_sched.c	sched: Rename task_running() to task_on_cpu()	2022-09-07 21:53:47 +02:00
core.c	header cleanups for 6.8	2024-01-10 16:43:55 -08:00
cpuacct.c	Merge branch 'sched/fast-headers' into sched/core	2022-03-15 09:05:05 +01:00
cpudeadline.c	sched/topology: Consolidate and clean up access to a CPU's max compute capacity	2023-10-09 12:59:48 +02:00
cpudeadline.h
cpufreq_schedutil.c	sched/fair: Fix frequency selection for non-invariant case	2024-01-16 10:41:25 +01:00
cpufreq.c	sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there	2022-02-23 10:58:33 +01:00
cpupri.c	sched/rt: Fix live lock between select_fallback_rq() and RT push	2023-09-28 22:58:13 +02:00
cpupri.h
cputime.c	cputime: remove cputime_to_nsecs fallback	2022-12-27 12:52:17 +01:00
deadline.c	sched/deadline: Introduce deadline servers	2023-11-15 09:57:51 +01:00
debug.c	sched/fair: Simplify util_est	2023-12-23 15:59:58 +01:00
fair.c	Quite a lot of kexec work this time around. Many singleton patches in	2024-01-09 11:46:20 -08:00
features.h	sched/fair: Remove SCHED_FEAT(UTIL_EST_FASTUP, true)	2023-12-23 15:59:56 +01:00
idle.c	sched/cpuidle: Comment about timers requirements VS idle handler	2023-11-15 09:57:51 +01:00
isolation.c	sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there	2022-02-23 10:58:33 +01:00
loadavg.c	sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there	2022-02-23 10:58:33 +01:00
Makefile	sched/headers: Introduce kernel/sched/build_policy.c and build multiple .c files there	2022-02-23 10:58:33 +01:00
membarrier.c	sched/membarrier: reduce the ability to hammer on sys_membarrier	2024-02-20 09:38:05 -08:00
pelt.c	sched: Make PELT acronym definition searchable	2023-10-13 09:56:30 +02:00
pelt.h	sched/fair: Simplify util_est	2023-12-23 15:59:58 +01:00
psi.c	sched/psi: Update poll => rtpoll in relevant comments	2023-10-16 13:42:49 +02:00
rt.c	sched: Unify runtime accounting across classes	2023-11-15 09:57:48 +01:00
sched-pelt.h
sched.h	Quite a lot of kexec work this time around. Many singleton patches in	2024-01-09 11:46:20 -08:00
smp.h	sched, smp: Trace smp callback causing an IPI	2023-03-24 11:01:29 +01:00
stats.c	sched/headers: Introduce kernel/sched/build_utility.c and build multiple .c files there	2022-02-23 10:58:33 +01:00
stats.h	sched/psi: Use task->psi_flags to clear in CPU migration	2022-10-30 10:12:15 +01:00
stop_task.c	sched: Unify runtime accounting across classes	2023-11-15 09:57:48 +01:00
swait.c	sched: add a few helpers to wake up tasks on the current cpu	2023-07-17 16:08:08 -07:00
topology.c	sched/fair: Scan cluster before scanning LLC in wake-up path	2023-10-24 10:38:43 +02:00
wait_bit.c	wait_on_bit: add an acquire memory barrier	2022-08-26 09:30:25 -07:00
wait.c	sched: remove wait bookmarks	2023-10-18 14:34:18 -07:00