linux/kernel/sched
Peter Zijlstra 85008bde41 sched: Avoid double preemption in __cond_resched_*lock*()
[ Upstream commit 7e406d1ff3 ]

For PREEMPT/DYNAMIC_PREEMPT the *_unlock() will already trigger a
preemption, no point in then calling preempt_schedule_common()
*again*.

Use _cond_resched() instead, since this is a NOP for the preemptible
configs while it provide a preemption point for the others.

Reported-by: xuhaifeng <xuhaifeng@oppo.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/YcGnvDEYBwOiV0cR@hirez.programming.kicks-ass.net
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-02-16 12:56:11 +01:00
..
autogroup.c sched/fair: Prevent dead task groups from regaining cfs_rq's 2021-11-25 09:48:32 +01:00
autogroup.h
clock.c sched: Fix various typos 2021-03-22 00:11:52 +01:00
completion.c completion: Use lockdep_assert_RT_in_threaded_ctx() in complete_all() 2020-03-23 18:40:25 +01:00
core_sched.c sched: prctl() core-scheduling interface 2021-05-12 11:43:31 +02:00
core.c sched: Avoid double preemption in __cond_resched_*lock*() 2022-02-16 12:56:11 +01:00
cpuacct.c sched/cpuacct: Fix user/system in shown cpuacct.usage* 2022-01-27 11:05:09 +01:00
cpudeadline.c sched,rt: Use the full cpumask for balancing 2020-11-10 18:39:00 +01:00
cpudeadline.h
cpufreq_schedutil.c cpufreq: schedutil: Use kobject release() method to free sugov_tunables 2021-08-06 15:34:55 +02:00
cpufreq.c cpufreq: Avoid leaving stale IRQ work items during CPU offline 2019-12-12 17:59:43 +01:00
cpupri.c sched: Fix various typos 2021-03-22 00:11:52 +01:00
cpupri.h sched/cpupri: Add CPUPRI_HIGHER 2020-10-29 11:00:30 +01:00
cputime.c cputime, cpuacct: Include guest time in user time in cpuacct.stat 2022-01-27 11:05:09 +01:00
deadline.c sched/deadline: Fix missing clock update in migrate_task_rq_dl() 2021-08-06 14:25:24 +02:00
debug.c sched/fair: Null terminate buffer when updating tunable_scaling 2021-10-01 13:57:57 +02:00
fair.c sched/pelt: Relax the sync of util_sum with util_avg 2022-02-01 17:27:10 +01:00
features.h sched: Warn on long periods of pending need_resched 2021-04-21 13:55:41 +02:00
idle.c sched/idle: Make the idle timer expire in hard interrupt context 2021-09-09 10:36:16 +02:00
isolation.c sched/isolation: Reconcile rcu_nocbs= and nohz_full= 2021-05-13 14:12:47 +02:00
loadavg.c sched: Make multiple runqueue task counters 32-bit 2021-05-12 21:34:17 +02:00
Makefile sched: Trivial core scheduling cookie management 2021-05-12 11:43:31 +02:00
membarrier.c sched/membarrier: Fix membarrier-rseq fence command missing from query bitmask 2022-02-01 17:27:05 +01:00
pelt.c sched: Fix various typos 2021-03-22 00:11:52 +01:00
pelt.h sched/pelt: Relax the sync of util_sum with util_avg 2022-02-01 17:27:10 +01:00
psi.c psi: fix "defined but not used" warnings when CONFIG_PROC_FS=n 2022-02-01 17:27:15 +01:00
rt.c sched/rt: Try to restart rt period timer when rt runtime exceeded 2022-01-27 11:03:30 +01:00
sched-pelt.h
sched.h sched/fair: Prevent dead task groups from regaining cfs_rq's 2021-11-25 09:48:32 +01:00
smp.h sched/headers: Split out open-coded prototypes into kernel/sched/smp.h 2020-05-28 11:03:20 +02:00
stats.c sched: Fix various typos 2021-03-22 00:11:52 +01:00
stats.h psi: Fix PSI_MEM_FULL state when tasks are in memstall and doing reclaim 2022-01-27 11:04:27 +01:00
stop_task.c sched: Introduce sched_class::pick_task() 2021-05-12 11:43:28 +02:00
swait.c sched/swait: Prepare usage in completions 2020-03-21 16:00:23 +01:00
topology.c sched/topology: Skip updating masks for non-online nodes 2021-08-20 12:32:57 +02:00
wait_bit.c sched/wait: fix ___wait_var_event(exclusive) 2019-12-17 13:32:50 +01:00
wait.c wait: add wake_up_pollfree() 2021-12-14 10:57:15 +01:00