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Message-Id: <20181014112612.2614-1-smuchun@gmail.com>
Date: Sun, 14 Oct 2018 19:26:12 +0800
From: Song Muchun <smuchun@...il.com>
To: mingo@...hat.com, mingo@...nel.org, peterz@...radead.org
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] sched/fair: Fix update min_vruntime in dequeue_entity()
The comment and the code around 2nd update_min_vruntime() are
not in agreement. From commit b60205c7c558 ("sched/fair: Fix
min_vruntime tracking"), I think that we want to update min_vruntime
when a task is sleeping/migrating. So, the check is inverted there.
Fixes: b60205c7c558 ("sched/fair: Fix min_vruntime tracking")
Signed-off-by: Song Muchun <smuchun@...il.com>
---
kernel/sched/fair.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 585d5726338b..ee271bb661cc 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -4003,7 +4003,7 @@ dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
* put back on, and if we advance min_vruntime, we'll be placed back
* further than we started -- ie. we'll be penalized.
*/
- if ((flags & (DEQUEUE_SAVE | DEQUEUE_MOVE)) == DEQUEUE_SAVE)
+ if ((flags & (DEQUEUE_SAVE | DEQUEUE_MOVE)) != DEQUEUE_SAVE)
update_min_vruntime(cfs_rq);
}
--
2.17.1
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