From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.fusionio.com ([66.114.96.31]:34243 "EHLO mx2.fusionio.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755259Ab2FYOsK (ORCPT ); Mon, 25 Jun 2012 10:48:10 -0400 Date: Mon, 25 Jun 2012 10:48:08 -0400 From: Josef Bacik To: Stefan Priebe - Profihost AG CC: Josef Bacik , "linux-btrfs@vger.kernel.org" Subject: Re: btrfs deadlock in 3.5-rc3 Message-ID: <20120625144807.GC7404@localhost.localdomain> References: <4FE58366.8000302@profihost.ag> <4FE862D7.3060005@fusionio.com> <4FE870DF.90308@profihost.ag> <20120625142048.GB7404@localhost.localdomain> <4FE8796E.9030300@profihost.ag> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" In-Reply-To: <4FE8796E.9030300@profihost.ag> Sender: linux-btrfs-owner@vger.kernel.org List-ID: On Mon, Jun 25, 2012 at 08:45:02AM -0600, Stefan Priebe - Profihost AG wrote: > > > > Thats weird, sysrq+w should have a bunch of stacktraces but it's empty, so > > unless theres a bug theres nothing blocked. Is the box actually hung or is it > > just taking forever? Maybe try sysrq+w again to see if the one you pasted was > > just a fluke? Thanks, > > This one looks better: > http://pastebin.com/raw.php?i=R4pztDRt > Ok looks like you have discard turned on. Can you turn that off and see if you can still reproduce the deadlock? If so sysrq+w again, if not then I know where to look ;). Thanks, Josef