Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753875AbaDDRGq (ORCPT ); Fri, 4 Apr 2014 13:06:46 -0400 Received: from e31.co.us.ibm.com ([32.97.110.149]:51257 "EHLO e31.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753540AbaDDRGo (ORCPT ); Fri, 4 Apr 2014 13:06:44 -0400 Date: Fri, 4 Apr 2014 10:06:39 -0700 From: "Paul E. McKenney" To: Dave Jones , Linux Kernel Subject: Re: rcu_prempt stalls / lockup Message-ID: <20140404170639.GO4284@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20140401172244.GA10363@redhat.com> <20140401175545.GV4284@linux.vnet.ibm.com> <20140401180414.GA12326@redhat.com> <20140401183245.GA12473@linux.vnet.ibm.com> <20140402162043.GA11090@linux.vnet.ibm.com> <20140402224840.GA5385@redhat.com> <20140403200143.GA8119@redhat.com> <20140403204656.GI4284@linux.vnet.ibm.com> <20140403214430.GA20249@redhat.com> <20140403223700.GA18353@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140403223700.GA18353@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14040417-8236-0000-0000-0000014B9B84 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Apr 03, 2014 at 06:37:00PM -0400, Dave Jones wrote: > On Thu, Apr 03, 2014 at 05:44:30PM -0400, Dave Jones wrote: > > On Thu, Apr 03, 2014 at 01:46:56PM -0700, Paul E. McKenney wrote: > > > git merge anti-fixes > > > > > > Then bisect through these reverts. > > > > > > I am assuming, perhaps naively, that changes under Documentation and > > > to torture testing should not be affecting you. > > > > > > Does this make sense? > > > > I tried reverting every one of those and could still hit it, which > > seems to indicate the bug is elsewhere, and rcu is just a victim of it. > > I'm going to start trying to revert the lockdep changes, given this seems > > to happen after that has warned.. > > And that was also without any success. > Tomorrow I'll try a bisect on just arch/x86. I cannot think of any better debugging strategy at the moment. Thanx, Paul -- 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/