From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753554Ab1HNQEU (ORCPT ); Sun, 14 Aug 2011 12:04:20 -0400 Received: from hera.kernel.org ([140.211.167.34]:52033 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752582Ab1HNQER (ORCPT ); Sun, 14 Aug 2011 12:04:17 -0400 Date: Sun, 14 Aug 2011 16:03:58 GMT From: tip-bot for Hillf Danton Message-ID: 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 Reply-To: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl, efault@gmx.de, dhillf@gmail.com, rostedt@goodmis.org, tglx@linutronix.de, yong.zhang0@gmail.com, mingo@elte.hu In-Reply-To: References: To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/core] sched: Remove resetting exec_start in put_prev_task_rt() Git-Commit-ID: 1812a643ccbfeb61a00a7f0d7219606e63d8815b X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (hera.kernel.org [127.0.0.1]); Sun, 14 Aug 2011 16:04:00 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 1812a643ccbfeb61a00a7f0d7219606e63d8815b Gitweb: http://git.kernel.org/tip/1812a643ccbfeb61a00a7f0d7219606e63d8815b Author: Hillf Danton AuthorDate: Thu, 16 Jun 2011 21:55:21 -0400 Committer: Ingo Molnar 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 Signed-off-by: Steven Rostedt Signed-off-by: Peter Zijlstra Cc: Mike Galbraith Cc: Yong Zhang Link: http://lkml.kernel.org/r/BANLkTimqWD=q6YnSDi-v9y=LMWecgEzEWg@mail.gmail.com Signed-off-by: Ingo Molnar --- 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