From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932369AbXKUBUr (ORCPT ); Tue, 20 Nov 2007 20:20:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1763805AbXKUBOE (ORCPT ); Tue, 20 Nov 2007 20:14:04 -0500 Received: from ms-smtp-03.nyroc.rr.com ([24.24.2.57]:61538 "EHLO ms-smtp-03.nyroc.rr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1765434AbXKUBNu (ORCPT ); Tue, 20 Nov 2007 20:13:50 -0500 Message-Id: <20071121011251.590599229@goodmis.org> References: <20071121010054.663842380@goodmis.org> User-Agent: quilt/0.46-1 Date: Tue, 20 Nov 2007 20:01:11 -0500 From: Steven Rostedt To: LKML Cc: Ingo Molnar , Gregory Haskins , Peter Zijlstra , Christoph Lameter , Steven Rostedt Subject: [PATCH v4 17/20] RT: restore the migratable conditional Content-Disposition: inline; filename=sched-renable-migratable-factor.patch Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Gregory Haskins We don't need to bother searching if the task cannot be migrated Signed-off-by: Gregory Haskins Signed-off-by: Steven Rostedt --- kernel/sched_rt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) Index: linux-compile.git/kernel/sched_rt.c =================================================================== --- linux-compile.git.orig/kernel/sched_rt.c 2007-11-20 19:53:11.000000000 -0500 +++ linux-compile.git/kernel/sched_rt.c 2007-11-20 19:53:13.000000000 -0500 @@ -173,7 +173,8 @@ static int select_task_rq_rt(struct task * that is just being woken and probably will have * cold cache anyway. */ - if (unlikely(rt_task(rq->curr))) { + if (unlikely(rt_task(rq->curr)) && + (p->nr_cpus_allowed > 1)) { int cpu = find_lowest_rq(p); return (cpu == -1) ? task_cpu(p) : cpu; --