Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753596Ab1FNCaG (ORCPT ); Mon, 13 Jun 2011 22:30:06 -0400 Received: from e34.co.us.ibm.com ([32.97.110.152]:48774 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750899Ab1FNCaD (ORCPT ); Mon, 13 Jun 2011 22:30:03 -0400 Subject: Re: BUG on 3.0-rc on commit d72bce0e67e8afc6eb959f656013cbb577426f1e From: Andrew Theurer Reply-To: habanero@linux.vnet.ibm.com To: Steven Rostedt Cc: Peter Zijlstra , linux-kernel@vger.kernel.org, paulmck In-Reply-To: <1308014683.9218.107.camel@gandalf.stny.rr.com> References: <1307711837.23688.33.camel@atheurer-ubuntu10> <1307715084.3941.166.camel@twins> <1307717156.3941.169.camel@twins> <1307720081.17297.6.camel@atheurer-w510> <1307723232.3941.178.camel@twins> <1307977614.17297.12.camel@atheurer-w510> <1307979239.9218.76.camel@gandalf.stny.rr.com> <1308009910.23688.34.camel@atheurer-ubuntu10> <1308014683.9218.107.camel@gandalf.stny.rr.com> Content-Type: text/plain; charset="UTF-8" Date: Mon, 13 Jun 2011 21:29:54 -0500 Message-ID: <1308018594.23688.36.camel@atheurer-ubuntu10> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1123 Lines: 40 On Mon, 2011-06-13 at 21:24 -0400, Steven Rostedt wrote: > On Mon, 2011-06-13 at 19:05 -0500, Andrew Theurer wrote: > > > > Could you try this patch? > > > > Yes, and it works! Thanks very much! > > Could you try this patch instead? I don't like holding off migration for > the entire boot processes. Sure, just tested this one, and it works fine as well. -Andrew > > -- Steve > > diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c > index 88725c9..4505bfb 100644 > --- a/kernel/sched_rt.c > +++ b/kernel/sched_rt.c > @@ -1239,6 +1239,10 @@ static int find_lowest_rq(struct task_struct *task) > int this_cpu = smp_processor_id(); > int cpu = task_cpu(task); > > + /* Make sure the mask is initialized first */ > + if (unlikely(!lowest_mask)) > + return -1; > + > if (task->rt.nr_cpus_allowed == 1) > return -1; /* No other targets possible */ > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/