From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754358Ab3GOS1X (ORCPT ); Mon, 15 Jul 2013 14:27:23 -0400 Received: from userp1040.oracle.com ([156.151.31.81]:29635 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754265Ab3GOS1W (ORCPT ); Mon, 15 Jul 2013 14:27:22 -0400 Message-ID: <51E43EE2.6020602@oracle.com> Date: Mon, 15 Jul 2013 14:26:42 -0400 From: Sasha Levin User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130623 Thunderbird/17.0.7 MIME-Version: 1.0 To: paulmck@linux.vnet.ibm.com CC: dipankar@in.ibm.com, LKML , peterz@infradead.org Subject: Re: rcu: qs related lockup on boot References: <51E06841.50701@oracle.com> <20130712211524.GH16780@linux.vnet.ibm.com> In-Reply-To: <20130712211524.GH16780@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/12/2013 05:15 PM, Paul E. McKenney wrote: > Might be we figured out a new way to deadlock RCU and the scheduler, > but just in case you rediscovered an old way, could you please try this > patch from Peter Zijlstra? > > http://www.mail-archive.com/linux-kernel@vger.kernel.org/msg464708.html > > If that doesn't help and you don't have lockdep enabled, could you > please enable it? I've been unable to reproduce it again with or without the patch. I'll update when it shows up again. Thanks, Sasha