linux-kernel - [PATCH 6/7] sched/deadline: depend on clearing throttled status in replenish_dl

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Message-Id: <1428310399-13489-6-git-send-email-wanpeng.li@linux.intel.com>
Date:	Mon,  6 Apr 2015 16:53:18 +0800
From:	Wanpeng Li <wanpeng.li@...ux.intel.com>
To:	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Cc:	Juri Lelli <juri.lelli@....com>, linux-kernel@...r.kernel.org,
	Wanpeng Li <wanpeng.li@...ux.intel.com>
Subject: [PATCH 6/7] sched/deadline: depend on clearing throttled status in replenish_dl_entity

Since the natural place to clear ->dl_throttled is in replenish_dl_entity(), and 
the task which is adjusted the priority is the current, it will be dequeued and 
then enqueued w/ replenish which can guarantee ->dl_throttled can be cleared, 
this patch drop the clear throttled status in function rt_mutex_setprio.

Signed-off-by: Wanpeng Li <wanpeng.li@...ux.intel.com>
---
 kernel/sched/core.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 28b0d75..f1b9222 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3037,7 +3037,6 @@ void rt_mutex_setprio(struct task_struct *p, int prio)
 		if (!dl_prio(p->normal_prio) ||
 		    (pi_task && dl_entity_preempt(&pi_task->dl, &p->dl))) {
 			p->dl.dl_boosted = 1;
-			p->dl.dl_throttled = 0;
 			enqueue_flag = ENQUEUE_REPLENISH;
 		} else
 			p->dl.dl_boosted = 0;
-- 
1.9.1

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