From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753074Ab3ACDPS (ORCPT ); Wed, 2 Jan 2013 22:15:18 -0500 Received: from e37.co.us.ibm.com ([32.97.110.158]:49790 "EHLO e37.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752861Ab3ACDPR (ORCPT ); Wed, 2 Jan 2013 22:15:17 -0500 Date: Wed, 2 Jan 2013 19:14:49 -0800 From: "Paul E. McKenney" To: Steven Rostedt Cc: linux-kernel@vger.kernel.org, Ben Hutchings Subject: Re: INFO: rcu_bh detected stall on CPU 3 (t=0 jiffies) Message-ID: <20130103031449.GB25701@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20130102190920.GD29452@charite.de> <20130102205630.GA5594@home.goodmis.org> <20130102212948.GA25701@linux.vnet.ibm.com> <1357174163.10284.8.camel@gandalf.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1357174163.10284.8.camel@gandalf.local.home> User-Agent: Mutt/1.5.21 (2010-09-15) X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13010303-7408-0000-0000-00000B7FBB41 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 02, 2013 at 07:49:23PM -0500, Steven Rostedt wrote: > On Wed, 2013-01-02 at 13:29 -0800, Paul E. McKenney wrote: > > On Wed, Jan 02, 2013 at 03:56:30PM -0500, Steven Rostedt wrote: > > > On Wed, Jan 02, 2013 at 08:09:20PM +0100, Ralf Hildebrandt wrote: > > > > This happened of a virtual guest (Linux mail 3.2.0-35-virtual #55-Ubuntu SMP Wed Dec 5 18:02:05 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux) > > > > > > 3.2 is rather old and this looks to be a stock Ubuntu kernel. May want > > > to file a Bugzilla (or whatever they call it) with them. > > > > > > > > > > > Jan 2 13:24:08 mail kernel: [3531872.484283] INFO: rcu_bh detected stall on CPU 3 (t=0 jiffies) > > > > > > 0 jiffies? > > > > One possibility is that they are missing commit a10d206e (rcu: Fix > > day-one dyntick-idle stall-warning bug), at least assuming that > > CONFIG_PREEMPT=n. This went into 3.6, IIRC. > > If that does fix the issue, we probably should send that off to Ben for > inclusion into 3.2 stable. Looks like you already CCed him, thank you! ;-) Thanx, Paul > Thanks, > > -- Steve > > > > > 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/ >