This is a note to let you know that I've just added the patch titled
sched/eevdf: Always update V if se->on_rq when reweighting
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sched-eevdf-always-update-v-if-se-on_rq-when-reweigh.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 5852e7a236db40e4713f3bb6182b2d25bdc59803
Author: Tianchen Ding <dtcccc@xxxxxxxxxxxxxxxxx>
Date: Wed Mar 6 10:21:32 2024 +0800
sched/eevdf: Always update V if se->on_rq when reweighting
[ 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: eab03c23c2a1 ("sched/eevdf: Fix vruntime adjustment on reweight")
Suggested-by: Abel Wu <wuyun.abel@xxxxxxxxxxxxx>
Signed-off-by: Tianchen Ding <dtcccc@xxxxxxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Abel Wu <wuyun.abel@xxxxxxxxxxxxx>
Tested-by: K Prateek Nayak <kprateek.nayak@xxxxxxx>
Tested-by: Chen Yu <yu.c.chen@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240306022133.81008-2-dtcccc@xxxxxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 69fe62126a28e..71e7cf6f77f65 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -3740,9 +3740,8 @@ static void reweight_entity(struct cfs_rq *cfs_rq, struct sched_entity *se,
if (se->on_rq) {
/* commit outstanding execution time */
- if (curr)
- update_curr(cfs_rq);
- else
+ update_curr(cfs_rq);
+ if (!curr)
__dequeue_entity(cfs_rq, se);
update_load_sub(&cfs_rq->load, se->load.weight);
}
