linux-kernel - [PATCH RESEND] sched/deadline: don't need to check throttled status when switched to dl

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Message-Id: <1426231671-12014-1-git-send-email-wanpeng.li@linux.intel.com>
Date:	Fri, 13 Mar 2015 15:27:51 +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 RESEND] sched/deadline: don't need to check throttled status when switched to dl

After commit 40767b0dc768 ("sched/deadline: Fix deadline parameter
modification handling"), deadline task throttled status is cleared
each time switch from dl, so throttled status always unset when
switch back, there is no need to check throttled status, this patch
drop the check.

Acked-by: Juri Lelli <juri.lelli@....com>
Signed-off-by: Wanpeng Li <wanpeng.li@...ux.intel.com>
---
 kernel/sched/deadline.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 3fa8fa6..5cb5c9c 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1659,14 +1659,6 @@ static void switched_to_dl(struct rq *rq, struct task_struct *p)
 {
 	int check_resched = 1;
 
-	/*
-	 * If p is throttled, don't consider the possibility
-	 * of preempting rq->curr, the check will be done right
-	 * after its runtime will get replenished.
-	 */
-	if (unlikely(p->dl.dl_throttled))
-		return;
-
 	if (task_on_rq_queued(p) && rq->curr != p) {
 #ifdef CONFIG_SMP
 		if (p->nr_cpus_allowed > 1 && rq->dl.overloaded &&
-- 
1.9.1

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