Commit-ID: f36c019c79edb3a89920afae1b2b45987af1a112
Gitweb: http://git.kernel.org/tip/f36c019c79edb3a89920afae1b2b45987af1a112
Author: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
AuthorDate: Wed, 6 Aug 2014 12:06:01 +0400
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Wed, 20 Aug 2014 09:47:20 +0200
sched/fair: Fix reschedule which is generated on throttled cfs_rq
(sched_entity::on_rq == 1) does not guarantee the task is pickable;
changes on throttled cfs_rq must not lead to reschedule.
Check for task_struct::on_rq instead.
Signed-off-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1407312361.8424.35.camel@tkhai
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
kernel/sched/fair.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 1413c44..bc37bb9 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -7494,7 +7494,7 @@ static void task_fork_fair(struct task_struct *p)
static void
prio_changed_fair(struct rq *rq, struct task_struct *p, int oldprio)
{
- if (!p->se.on_rq)
+ if (!p->on_rq)
return;
/*
@@ -7550,15 +7550,15 @@ static void switched_from_fair(struct rq *rq, struct task_struct *p)
*/
static void switched_to_fair(struct rq *rq, struct task_struct *p)
{
- struct sched_entity *se = &p->se;
#ifdef CONFIG_FAIR_GROUP_SCHED
+ struct sched_entity *se = &p->se;
/*
* Since the real-depth could have been changed (only FAIR
* class maintain depth value), reset depth properly.
*/
se->depth = se->parent ? se->parent->depth + 1 : 0;
#endif
- if (!se->on_rq)
+ if (!p->on_rq)
return;
/*
--
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