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sched/eevdf: Always update V if se->on_rq when reweighting

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BugLink: https://bugs.launchpad.net/bugs/2070337

[ Upstream commit 11b1b8bc2b98e21ddf47e08b56c21502c685b2c3 ]

reweight_eevdf() needs the latest V to do accurate calculation for new
ve and vd. So update V unconditionally when se is runnable.

Fixes: eab03c23c2 ("sched/eevdf: Fix vruntime adjustment on reweight")
Suggested-by: Abel Wu <wuyun.abel@bytedance.com>
Signed-off-by: Tianchen Ding <dtcccc@linux.alibaba.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Abel Wu <wuyun.abel@bytedance.com>
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Tested-by: Chen Yu <yu.c.chen@intel.com>
Link: https://lore.kernel.org/r/20240306022133.81008-2-dtcccc@linux.alibaba.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Tianchen Ding
2024-03-06 10:21:32 +08:00
committed by Stefan Bader
parent e77121b4dc
commit 025a8ea359
1 changed files with 2 additions and 3 deletions
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kernel/sched/fair.c
+2 -3
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@@ -3790,9 +3790,8 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
if (se->on_rq) { if (se->on_rq) {
/* commit outstanding execution time */ /* commit outstanding execution time */
if (curr) update_curr(cfs_rq);
update_curr(cfs_rq); if (!curr)
else
__dequeue_entity(cfs_rq, se); __dequeue_entity(cfs_rq, se);
update_load_sub(&cfs_rq->load, se->load.weight); update_load_sub(&cfs_rq->load, se->load.weight);
} }