linux-kernel - [PATCH] DLS: fix check_preempt_curr

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Message-ID: <CAJd=RBDhm-Tr_9OrO3oz9zhps53yWSKQ9tvtdq_03A+tc0FnuQ@mail.gmail.com>
Date:	Mon, 9 Apr 2012 20:51:49 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Dario Faggioli <raistlin@...ux.it>,
	Juri Lelli <juri.lelli@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Hillf Danton <dhillf@...il.com>
Subject: [PATCH] DLS: fix check_preempt_curr_dl

If not sure the CPU of waker is the CPU of wakee, we have to check the
current task of given runqueue.

Signed-off-by: Hillf Danton <dhillf@...il.com>
---

--- a/kernel/sched_dl.c	Mon Apr  9 19:39:56 2012
+++ b/kernel/sched_dl.c	Mon Apr  9 20:42:08 2012
@@ -888,9 +888,9 @@ static void check_preempt_curr_dl(struct
 	 * let us try to decide what's the best thing to do...
 	 */
 	if ((p->dl.deadline == rq->curr->dl.deadline) &&
-	    !need_resched())
+					!test_tsk_need_resched(rq->curr))
 		check_preempt_equal_dl(rq, p);
-#endif /* CONFIG_SMP */
+#endif
 }

 #ifdef CONFIG_SCHED_HRTICK
--
--
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