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

…

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

…

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

…

cpupri.c

sched: Fix various typos

2021-03-22 00:11:52 +01:00

cpupri.h

…

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

…

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

…

topology.c

sched/topology: Skip updating masks for non-online nodes

2021-08-20 12:32:57 +02:00

wait_bit.c

…

wait.c

wait: add wake_up_pollfree()

2021-12-14 10:57:15 +01:00