From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Layton Subject: Re: Freezing of tasks failed after 20.01 seconds in 3.2.0-rc4+ (Linus GIT af968e2) Date: Thu, 5 Jan 2012 07:22:17 -0500 Message-ID: <20120105072217.7ce7943f@tlielax.poochiereds.net> References: <4EFAAFEF.6070503@linux.vnet.ibm.com> <201112282303.26978.rjw@sisk.pl> <20120105115330.GA29569@atrey.karlin.mff.cuni.cz> <3BA6B994-29A1-44E6-AF10-C9331F3BB521@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 8BIT Cc: Pavel Machek , "Rafael J. Wysocki" , "Srivatsa S. Bhat" , Tejun Heo , Linux PM mailing list , linux-kernel , "linux-fsdevel@vger.kernel.org" To: Miles Lane Return-path: Received: from mx1.redhat.com ([209.132.183.28]:56273 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755415Ab2AEMW2 convert rfc822-to-8bit (ORCPT ); Thu, 5 Jan 2012 07:22:28 -0500 In-Reply-To: <3BA6B994-29A1-44E6-AF10-C9331F3BB521@gmail.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: On Thu, 5 Jan 2012 07:11:21 -0500 Miles Lane wrote: > > On Jan 5, 2012, at 6:53 AM, Pavel Machek wrote: > > > Hi! > >>> > >>> Miles Lane (in CC) hit freezing failures in 3.2.0-rc4+ (Linus GIT af968e2) > >>> while trying to suspend the machine. > >> > >> Well, ext3 seems to be involved. I don't see any problems with suspending > >> those kernels on my test machines, but I don't use ext3 on them any more. > >> > >> It would be good to rule out ext3 somehow. > > > > I still use ext3 here, and suspend works in recent kernels. > > > > Is it reproducible for Miles? > > It was a one time event, sorry. > > All the best. >>From looking at the stack traces, it really just looks like the ext3 code was waiting for requests to come back from the underlying storage. I don't know ext3 that well, but could something have offlined the storage while these tasks were waiting for their requests to come back? Another hypothesis...could those requests require kthreads that got frozen while processing these requests? -- Jeff Layton