From: tip-bot for Hillf Danton <dhillf@gmail.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com,
a.p.zijlstra@chello.nl, efault@gmx.de, dhillf@gmail.com,
rostedt@goodmis.org, tglx@linutronix.de, yong.zhang0@gmail.com,
mingo@elte.hu
Subject: [tip:sched/core] sched: Remove resetting exec_start in put_prev_task_rt()
Date: Sun, 14 Aug 2011 16:03:58 GMT [thread overview]
Message-ID: <tip-1812a643ccbfeb61a00a7f0d7219606e63d8815b@git.kernel.org> (raw)
In-Reply-To: <BANLkTimqWD=q6YnSDi-v9y=LMWecgEzEWg@mail.gmail.com>
Commit-ID: 1812a643ccbfeb61a00a7f0d7219606e63d8815b
Gitweb: http://git.kernel.org/tip/1812a643ccbfeb61a00a7f0d7219606e63d8815b
Author: Hillf Danton <dhillf@gmail.com>
AuthorDate: Thu, 16 Jun 2011 21:55:21 -0400
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Sun, 14 Aug 2011 12:00:50 +0200
sched: Remove resetting exec_start in put_prev_task_rt()
There's no reason to clean the exec_start in put_prev_task_rt() as it is reset
when the task gets back to the run queue. This saves us doing a store() in the
fast path.
Signed-off-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Yong Zhang <yong.zhang0@gmail.com>
Link: http://lkml.kernel.org/r/BANLkTimqWD=q6YnSDi-v9y=LMWecgEzEWg@mail.gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
kernel/sched_rt.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 8e18945..70107a3 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -1178,7 +1178,6 @@ static struct task_struct *pick_next_task_rt(struct rq *rq)
static void put_prev_task_rt(struct rq *rq, struct task_struct *p)
{
update_curr_rt(rq);
- p->se.exec_start = 0;
/*
* The previous task needs to be made eligible for pushing
prev parent reply other threads:[~2011-08-14 16:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-01 14:03 [PATCH] sched: remove resetting exec_start in put_prev_task_rt() Hillf Danton
2011-06-01 14:22 ` Steven Rostedt
2011-06-02 8:04 ` Yong Zhang
2011-06-04 4:26 ` Hillf Danton
2011-06-09 12:34 ` Steven Rostedt
2011-06-10 2:38 ` Yong Zhang
2011-06-10 2:41 ` Steven Rostedt
2011-06-10 10:19 ` Peter Zijlstra
2011-06-10 14:48 ` Hillf Danton
2011-06-10 14:58 ` Steven Rostedt
2011-06-10 15:12 ` Hillf Danton
2011-08-14 16:03 ` tip-bot for Hillf Danton [this message]
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