[PATCH] sched: don't awaken RT tasks on expired array

RT tasks are being awakened on the expired array when expired_starving() is
true, whereas they really should be excluded.  Fix.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/kernel/sched.c b/kernel/sched.c
index 2e8a146dd0660a8e8a914ee0936e66832934b33d..365f0b90b4de534b628acb871ace309491672690 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -713,7 +713,7 @@ static void __activate_task(task_t *p, runqueue_t *rq)
 {
        prio_array_t *target = rq->active;
 
-       if (unlikely(batch_task(p) || expired_starving(rq)))
+       if (unlikely(batch_task(p) || (expired_starving(rq) && !rt_task(p))))
                target = rq->expired;
        enqueue_task(p, target);
        rq->nr_running++;