Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751332AbWEMPj6 (ORCPT ); Sat, 13 May 2006 11:39:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751333AbWEMPj5 (ORCPT ); Sat, 13 May 2006 11:39:57 -0400 Received: from ms-smtp-04.nyroc.rr.com ([24.24.2.58]:35781 "EHLO ms-smtp-04.nyroc.rr.com") by vger.kernel.org with ESMTP id S1751332AbWEMPj5 (ORCPT ); Sat, 13 May 2006 11:39:57 -0400 Date: Sat, 13 May 2006 11:39:41 -0400 (EDT) From: Steven Rostedt X-X-Sender: rostedt@gandalf.stny.rr.com To: Mike Galbraith cc: Florian Paul Schmidt , Darren Hart , lkml , Ingo Molnar , Thomas Gleixner Subject: Re: rt20 scheduling latency testcase and failure data In-Reply-To: <1147521338.7909.5.camel@homer> Message-ID: References: <200605121924.53917.dvhltc@us.ibm.com> <20060513112039.41536fb5@mango.fruits> <1147521338.7909.5.camel@homer> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 956 Lines: 29 On Sat, 13 May 2006, Mike Galbraith wrote: > On Sat, 2006-05-13 at 11:20 +0200, Florian Paul Schmidt wrote: > > > P.S.: I ran the test a few [20 or so] times and didn't get any failures > > of the sort you see. Even with a 1ms period: > > Something odd happened here... the first time I booted rt21, I could > reproduce the problem quite regularly. Since reboot though, poof. > > Elves and Gremlins. > Careful, rt21 has a bug slipped in that might have funny results on SMP machines: + if (!cpus_equal(current->cpus_allowed, irq_affinity[irq])); + set_cpus_allowed(current, irq_affinity[irq]); John (although he later fixed it) added a ; after the if. But the fix is not yet in Ingo's patch. -- Steve - 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/