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159b172906
linux/kernel/sched
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Hui Su 159b172906 sched/wait: Avoid modifying entry on failed priority registration 
add_wait_queue_priority_exclusive() sets WQ_FLAG_EXCLUSIVE and
WQ_FLAG_PRIORITY before checking whether another priority waiter is
already present. Thus, when registration fails with -EBUSY, the entry
is left unqueued but with modified flags.

There is no need to modify the entry before the failure check. Move the
flag update after the check so that a rejected registration does not
unnecessarily alter the entry.

Signed-off-by: Hui Su <sh_def@163.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Link: https://patch.msgid.link/20261011015019.4056529-1-sh_def@163.com
2026-10-13 13:51:28 +02:00
..
ext Merge branch 'tip/sched/urgent' 2026-10-13 13:51:24 +02:00
autogroup.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
autogroup.h
build_policy.c sched_ext: Move scx_dispatch_sched() to a new inlines.h 2026-07-15 13:37:59 -10:00
build_utility.c
clock.c sched/clock: Avoid false sharing for sched_clock_irqtime 2026-02-03 12:04:19 +01:00
completion.c
core_sched.c sched: Unify SMT active check via sched_smt_active() 2026-05-19 12:17:37 +02:00
core.c Merge branch 'tip/sched/urgent' 2026-10-13 13:51:24 +02:00
cpuacct.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cpudeadline.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cpudeadline.h sched/deadline: only set free_cpus for online runqueues 2025-10-16 11:13:49 +02:00
cpufreq_schedutil.c cpufreq: schedutil: Fix rate limit overflow 2026-08-15 19:00:11 +02:00
cpufreq.c
cpupri.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
cpupri.h
cputime.c sched: Convert paravirt_steal to new static key APIs 2026-09-02 10:28:24 +02:00
deadline.c sched: Restart fair hrtick after same-task repicks 2026-09-25 12:45:57 +02:00
debug.c sched/debug: Add migration stats due to non preferred CPUs 2026-09-28 08:44:42 +02:00
fair.c rbtree: Declare augmented callbacks per field with RB_AUG() 2026-10-13 13:51:27 +02:00
features.h sched/rt: Have RT_PUSH_IPI be default off for non PREEMPT_RT 2026-05-19 12:17:39 +02:00
idle.c sched: Restart fair hrtick after same-task repicks 2026-09-25 12:45:57 +02:00
isolation.c sched/isolation: Defer freeing of cpumask memblock memory to initcall 2026-08-13 12:37:03 +02:00
loadavg.c Merge branch 'tip/sched/urgent' 2025-07-14 17:16:28 +02:00
Makefile sched: Enable context analysis for core.c and fair.c 2026-01-05 16:43:36 +01:00
membarrier.c Locking updates for v7.2: 2026-06-15 14:21:14 +05:30
pelt.c sched/eevdf: Move to a single runqueue 2026-06-30 10:56:53 +02:00
pelt.h sched/fair: Switch to task based throttle model 2025-09-03 10:03:14 +02:00
psi.c Merge branch 'sched/urgent' 2026-08-14 16:12:58 +02:00
rq-offsets.c sched: Make migrate_{en,dis}able() inline 2025-09-25 09:57:16 +02:00
rt.c sched: Restart fair hrtick after same-task repicks 2026-09-25 12:45:57 +02:00
sched-pelt.h
sched.h sched/core: Push current task from non preferred CPU 2026-09-28 08:44:42 +02:00
smp.h
stats.c
stats.h sched/fair: Co-locate cfs_rq and sched_entity in cfs_tg_state 2026-06-02 12:26:10 +02:00
stop_task.c sched: Restart fair hrtick after same-task repicks 2026-09-25 12:45:57 +02:00
swait.c
syscalls.c Linux 7.0-rc4 2026-03-17 07:14:42 +01:00
topology.c Merge branch 'tip/sched/urgent' 2026-10-13 13:51:24 +02:00
wait_bit.c futex: Fix might_sleep() warning in futex_pivot_pending() 2026-08-20 18:26:42 +02:00
wait.c sched/wait: Avoid modifying entry on failed priority registration 2026-10-13 13:51:28 +02:00