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sched/fair: Fix endless loop in idle_balance() 

Check for fair tasks number to decide, that we've pulled a task.
rq's nr_running may contain throttled RT tasks.

Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1394118975.19290.104.camel@tkhai
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Kirill Tkhai 2014-03-06 19:16:15 +04:00 committed by Ingo Molnar
parent 4c6c4e38c4
commit 35805ff8f4
1 changed files with 1 additions and 1 deletions
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2
kernel/sched/fair.c
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@ -6710,7 +6710,7 @@ static int idle_balance(struct rq *this_rq)
* While browsing the domains, we released the rq lock. * While browsing the domains, we released the rq lock.
* A task could have be enqueued in the meantime * A task could have be enqueued in the meantime
*/ */
if (this_rq->nr_running && !pulled_task) { if (this_rq->cfs.h_nr_running && !pulled_task) {
pulled_task = 1; pulled_task = 1;
goto out; goto out;
} }