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sched/deadline: Reschedule from switched_from_dl() after a successful pull 

In switched_from_dl() we have to issue a resched if we successfully
pulled some task from other cpus. This patch also aligns the behavior
with -rt.

Suggested-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Kirill Tkhai <ktkhai@parallels.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1414708776-124078-5-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Wanpeng Li 2014-10-31 06:39:35 +08:00 committed by Ingo Molnar
parent 6b0a563f3a
commit cd66091162
1 changed files with 5 additions and 2 deletions
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7
kernel/sched/deadline.c
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@ -1643,8 +1643,11 @@ static void switched_from_dl(struct rq *rq, struct task_struct *p)
* this is the right place to try to pull some other one
* from an overloaded cpu, if any.
*/
if (!rq->dl.dl_nr_running)
pull_dl_task(rq);
if (!task_on_rq_queued(p) || rq->dl.dl_nr_running)
return;
if (pull_dl_task(rq))
resched_curr(rq);
#endif
}