From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932136Ab1FQB7b (ORCPT ); Thu, 16 Jun 2011 21:59:31 -0400 Received: from hrndva-omtalb.mail.rr.com ([71.74.56.123]:56323 "EHLO hrndva-omtalb.mail.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758134Ab1FQB7V (ORCPT ); Thu, 16 Jun 2011 21:59:21 -0400 X-Authority-Analysis: v=1.1 cv=5asQ6euaRPJxDdFxwvXsn6JDb7fmFbz8qWDLMfa45gU= c=1 sm=0 a=vhdKIqpQuCYA:10 a=65Ev7lBb6mkA:10 a=5SG0PmZfjMsA:10 a=bbbx4UPp9XUA:10 a=OPBmh+XkhLl+Enan7BmTLg==:17 a=pGLkceISAAAA:8 a=JfrnYn6hAAAA:8 a=VwQbUJbxAAAA:8 a=meVymXHHAAAA:8 a=UC-ONSXTy2KUzNwaElIA:9 a=Y3cTEihHMm-g29bCKGgA:7 a=MSl-tDqOz04A:10 a=_RhRFcbxBZMA:10 a=3Rfx1nUSh_UA:10 a=jeBq3FmKZ4MA:10 a=OPBmh+XkhLl+Enan7BmTLg==:117 X-Cloudmark-Score: 0 X-Originating-IP: 67.242.120.143 Message-Id: <20110617015919.519061866@goodmis.org> User-Agent: quilt/0.48-1 Date: Thu, 16 Jun 2011 21:55:21 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , Peter Zijlstra , Mike Galbraith , Yong Zhang , Hillf Danton Subject: [RFC][PATCH 5/7] sched: Remove resetting exec_start in put_prev_task_rt() References: <20110617015516.301117218@goodmis.org> Content-Disposition: inline; filename=0005-sched-Remove-resetting-exec_start-in-put_prev_task_r.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hillf Danton 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. Cc: Mike Galbraith Cc: Yong Zhang Cc: Peter Zijlstra Cc: Ingo Molnar Signed-off-by: Hillf Danton Link: http://lkml.kernel.org/r/BANLkTimqWD=q6YnSDi-v9y=LMWecgEzEWg@mail.gmail.com Signed-off-by: Steven Rostedt --- 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 7737d41..1546c1c 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -1166,7 +1166,6 @@ 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 -- 1.7.4.4