From: Chris Mason Subject: Re: [BUG] fatal hang untarring 90GB file, possibly writeback related. Date: Thu, 28 Apr 2011 09:45:34 -0400 Message-ID: <1303998300-sup-4941@think> References: <1303920553.2583.7.camel@mulgrave.site> <1303921583-sup-4021@think> <1303923000.2583.8.camel@mulgrave.site> <1303923177-sup-2603@think> <1303924902.2583.13.camel@mulgrave.site> <1303925374-sup-7968@think> <1303926637.2583.17.camel@mulgrave.site> <1303934716.2583.22.camel@mulgrave.site> <1303990590.2081.9.camel@lenovo> <1303993705-sup-5213@think> <1303998140.2081.11.camel@lenovo> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: James Bottomley , linux-fsdevel , linux-mm , linux-kernel , linux-ext4 To: Colin Ian King Return-path: Received: from rcsinet10.oracle.com ([148.87.113.121]:47327 "EHLO rcsinet10.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756549Ab1D1Np5 (ORCPT ); Thu, 28 Apr 2011 09:45:57 -0400 In-reply-to: <1303998140.2081.11.camel@lenovo> Sender: linux-ext4-owner@vger.kernel.org List-ID: Excerpts from Colin Ian King's message of 2011-04-28 09:42:20 -0400: > > On Thu, 2011-04-28 at 08:29 -0400, Chris Mason wrote: > > Excerpts from Colin Ian King's message of 2011-04-28 07:36:30 -0400: > > > One more data point to add, I've been looking at an identical issue when > > > copying large amounts of data. I bisected this - and the lockups occur > > > with commit > > > 3e7d344970673c5334cf7b5bb27c8c0942b06126 - before that I don't see the > > > issue. With this commit, my file copy test locks up after ~8-10 > > > iterations, before this commit I can copy > 100 times and don't see the > > > lockup. > > > > Well, that's really interesting. I tried with compaction on here and > > couldn't trigger it, but this (very very lightly) tested patch might > > help. > > > Thanks Chris, > > I've given this a soak test but I still see the same lockup. Could you post the soft lockups you're seeing? -chris