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sched/rt: Enqueue just unthrottled rt_rq back on the stack in __disable_runtime() 

Make rt_rq available for pick_next_task(). Otherwise, their tasks
stay prisoned long time till dead cpu becomes alive again.

Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Kirill Tkhai <ktkhai@parallels.com>
CC: Konstantin Khorenko <khorenko@parallels.com>
CC: Ben Segall <bsegall@google.com>
CC: Paul Turner <pjt@google.com>
CC: Mike Galbraith <umgwanakikbuti@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1403684388.3462.43.camel@tkhai
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Kirill Tkhai 2014-06-25 12:19:48 +04:00 committed by Ingo Molnar
parent 0e59bdaea7
commit 99b625670f
1 changed files with 3 additions and 0 deletions
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3
kernel/sched/rt.c
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@ -740,6 +740,9 @@ balanced:
rt_rq->rt_throttled = 0;
raw_spin_unlock(&rt_rq->rt_runtime_lock);
raw_spin_unlock(&rt_b->rt_runtime_lock);
/* Make rt_rq available for pick_next_task() */
sched_rt_rq_enqueue(rt_rq);
}
}