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sched/fair: Update min_vruntime for reweight_entity() correctly

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[ Upstream commit 5068d84054b766efe7c6202fc71b2350d1c326f1 ]

Since reweight_entity() may have chance to change the weight of
cfs_rq->curr entity, we should also update_min_vruntime() if
this is the case

Fixes: eab03c23c2a1 ("sched/eevdf: Fix vruntime adjustment on reweight")
Signed-off-by: Yiwei Lin <s921975628@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Abel Wu <wuyun.abel@bytedance.com>
Link: https://lore.kernel.org/r/20231117080106.12890-1-s921975628@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yiwei Lin 2023-11-17 16:01:06 +08:00 • committed by Greg Kroah-Hartman
parent 024352f792
commit 20c0981478
1 changed files with 10 additions and 10 deletions
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20
kernel/sched/fair.c
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@ -3771,17 +3771,17 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
enqueue_load_avg(cfs_rq, se);
if (se->on_rq) {
update_load_add(&cfs_rq->load, se->load.weight);
if (!curr) {
/*
* The entity's vruntime has been adjusted, so let's check
* whether the rq-wide min_vruntime needs updated too. Since
* the calculations above require stable min_vruntime rather
* than up-to-date one, we do the update at the end of the
* reweight process.
*/
if (!curr)
__enqueue_entity(cfs_rq, se);
update_min_vruntime(cfs_rq);
}
/*
* The entity's vruntime has been adjusted, so let's check
* whether the rq-wide min_vruntime needs updated too. Since
* the calculations above require stable min_vruntime rather
* than up-to-date one, we do the update at the end of the
* reweight process.
*/
update_min_vruntime(cfs_rq);
}
}