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| author | Chengming Zhou <zhouchengming@bytedance.com> | 2022-09-26 16:19:31 +0800 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-10-30 10:12:15 +0100 |
| commit | 52b33d87b9197c51e8ffdc61873739d90dd0a16f (patch) | |
| tree | 392b655b87d75cce109258c3adc5f8157dea366b /kernel/sched/core.c | |
| parent | 710ffe671e014d5ccbcff225130a178b088ef090 (diff) | |
| download | linux-52b33d87b9197c51e8ffdc61873739d90dd0a16f.tar.bz2 | |
sched/psi: Use task->psi_flags to clear in CPU migration
The commit d583d360a620 ("psi: Fix psi state corruption when schedule()
races with cgroup move") fixed a race problem by making cgroup_move_task()
use task->psi_flags instead of looking at the scheduler state.
We can extend task->psi_flags usage to CPU migration, which should be
a minor optimization for performance and code simplicity.
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Link: https://lore.kernel.org/r/20220926081931.45420-1-zhouchengming@bytedance.com
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 87c9cdf37a26..07ac08caf019 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2053,7 +2053,7 @@ static inline void enqueue_task(struct rq *rq, struct task_struct *p, int flags) if (!(flags & ENQUEUE_RESTORE)) { sched_info_enqueue(rq, p); - psi_enqueue(p, flags & ENQUEUE_WAKEUP); + psi_enqueue(p, (flags & ENQUEUE_WAKEUP) && !(flags & ENQUEUE_MIGRATED)); } uclamp_rq_inc(rq, p); |