From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756931AbZIPKT6 (ORCPT ); Wed, 16 Sep 2009 06:19:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752392AbZIPKTz (ORCPT ); Wed, 16 Sep 2009 06:19:55 -0400 Received: from hera.kernel.org ([140.211.167.34]:46318 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756809AbZIPKTy (ORCPT ); Wed, 16 Sep 2009 06:19:54 -0400 Date: Wed, 16 Sep 2009 10:19:31 GMT From: tip-bot for Mike Galbraith Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com, a.p.zijlstra@chello.nl, efault@gmx.de, tglx@linutronix.de, mingo@elte.hu Reply-To: mingo@redhat.com, hpa@zytor.com, linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl, efault@gmx.de, tglx@linutronix.de, mingo@elte.hu In-Reply-To: References: To: linux-tip-commits@vger.kernel.org Subject: [tip:sched/core] sched: Complete buddy switches Message-ID: Git-Commit-ID: 3cb63d527f76e25dbccce4f577f21aecfa2abac7 X-Mailer: tip-git-log-daemon MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Wed, 16 Sep 2009 10:19:32 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 3cb63d527f76e25dbccce4f577f21aecfa2abac7 Gitweb: http://git.kernel.org/tip/3cb63d527f76e25dbccce4f577f21aecfa2abac7 Author: Mike Galbraith AuthorDate: Fri, 11 Sep 2009 12:01:17 +0200 Committer: Ingo Molnar CommitDate: Tue, 15 Sep 2009 16:01:02 +0200 sched: Complete buddy switches Add a NEXT_BUDDY feature flag to aid in debugging. Signed-off-by: Mike Galbraith Signed-off-by: Peter Zijlstra LKML-Reference: Signed-off-by: Ingo Molnar --- kernel/sched_fair.c | 3 ++- kernel/sched_features.h | 1 + 2 files changed, 3 insertions(+), 1 deletions(-) diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index cea5b82..4f6356e 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1501,7 +1501,8 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int sync) */ if (sched_feat(LAST_BUDDY) && likely(se->on_rq && curr != rq->idle)) set_last_buddy(se); - set_next_buddy(pse); + if (sched_feat(NEXT_BUDDY)) + set_next_buddy(pse); /* * We can come here with TIF_NEED_RESCHED already set from new task diff --git a/kernel/sched_features.h b/kernel/sched_features.h index 07c8250..6174c12 100644 --- a/kernel/sched_features.h +++ b/kernel/sched_features.h @@ -14,5 +14,6 @@ SCHED_FEAT(LB_WAKEUP_UPDATE, 1) SCHED_FEAT(ASYM_EFF_LOAD, 1) SCHED_FEAT(WAKEUP_SYNC, 0) SCHED_FEAT(WAKEUP_OVERLAP, 0) +SCHED_FEAT(NEXT_BUDDY, 1) SCHED_FEAT(LAST_BUDDY, 1) SCHED_FEAT(OWNER_SPIN, 1)