Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752831Ab3FZTk5 (ORCPT ); Wed, 26 Jun 2013 15:40:57 -0400 Received: from mx1.redhat.com ([209.132.183.28]:15471 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752307Ab3FZTk4 (ORCPT ); Wed, 26 Jun 2013 15:40:56 -0400 Date: Wed, 26 Jun 2013 15:40:39 -0400 From: Dave Jones To: Oleg Nesterov Cc: "Paul E. McKenney" , Linux Kernel , Linus Torvalds , "Eric W. Biederman" , Andrey Vagin , Steven Rostedt Subject: Re: frequent softlockups with 3.10rc6. Message-ID: <20130626194039.GA2833@redhat.com> Mail-Followup-To: Dave Jones , Oleg Nesterov , "Paul E. McKenney" , Linux Kernel , Linus Torvalds , "Eric W. Biederman" , Andrey Vagin , Steven Rostedt References: <20130622013731.GA22918@redhat.com> <20130622173129.GA29375@redhat.com> <20130622215905.GA28238@redhat.com> <20130623143634.GA2000@redhat.com> <20130623150603.GA32313@redhat.com> <20130623160452.GA11740@redhat.com> <20130624155758.GA5993@redhat.com> <20130624173510.GA1321@redhat.com> <20130625153520.GA7784@redhat.com> <20130626191853.GA29049@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130626191853.GA29049@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1354 Lines: 32 On Wed, Jun 26, 2013 at 09:18:53PM +0200, Oleg Nesterov wrote: > On 06/25, Dave Jones wrote: > > > > Took a lot longer to trigger this time. (13 hours of runtime). > > And _perhaps_ this means that 3.10-rc7 without 8aac6270 needs more > time to hit the same bug ;) > > Dave, I am not going to "deny the problem". We should investigate it > anyway. And yes, 8aac6270 is not as trivial as it looks. > > But so far it is absolutely unclear how it can trigger such a problem, > and none of the traces _look_ as if it should be blamed. > > Probably I should try to reproduce too... I've tried so many different kernels this last week that I've forgotten just how long I left the build without 8aac6270 running, but I'm pretty sure it included an overnight run last weekend. Given I have two identical machines that can reproduce it, I'll leave one running for a few days with that reverted just to see if it turns up. (Though, I seem to be walking into other issues [like the perf overflow bug I reported last night] before seeing the lockups reproduce, so I'll keep an eye on it). Dave -- 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/