Messages in this thread Patch in this message | | | From | Sasha Levin <> | Subject | [PATCH AUTOSEL 4.14 10/19] sched/fair: Fix the min_vruntime update logic in dequeue_entity() | Date | Tue, 30 Oct 2018 09:28:15 -0400 |
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From: Song Muchun <smuchun@gmail.com>
[ Upstream commit 9845c49cc9bbb317a0bc9e9cf78d8e09d54c9af0 ]
The comment and the code around the update_min_vruntime() call in dequeue_entity() 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 - fix it.
Signed-off-by: Song Muchun <smuchun@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Mike Galbraith <efault@gmx.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: b60205c7c558 ("sched/fair: Fix min_vruntime tracking") Link: http://lkml.kernel.org/r/20181014112612.2614-1-smuchun@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 b2d699f28304..a2949d4e9f1b 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -3825,7 +3825,7 @@ 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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