[PATCH] sched: fix need_resched() when checking peempt

[Hillf Danton]

When checking if current task could be preempted by a newly woken task,
further check could be bypassed if the current thread is different from
the current task of run-queue, and it is corrected accordingly.

Signed-off-by: Hillf Danton <dhillf@xxxxxxxxx>
---

--- tip-git/kernel/sched_rt.c	Sun May 22 20:12:01 2011
+++ sched_rt.c	Tue May 24 20:31:27 2011
@@ -1074,7 +1074,7 @@ static void check_preempt_curr_rt(struct
 	 * to move current somewhere else, making room for our non-migratable
 	 * task.
 	 */
-	if (p->prio == rq->curr->prio && !need_resched())
+	if (p->prio == rq->curr->prio && !test_tsk_need_resched(rq->curr))
 		check_preempt_equal_prio(rq, p);
 #endif
 }
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/