Return-Path: Received: from mout.gmx.net ([212.227.17.20]:57141 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753503AbbEUIjh (ORCPT ); Thu, 21 May 2015 04:39:37 -0400 Date: Thu, 21 May 2015 14:09:24 +0530 (IST) From: Govindarajulu Varadarajan <_govind@gmx.com> To: Josef Bacik cc: Govindarajulu Varadarajan <_govind@gmx.com>, linux-btrfs@vger.kernel.org, linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, clm@fb.com, dsterba@suse.cz Subject: Re: btrfs: kernel BUG at mm/page-writeback.c:2286! In-Reply-To: <555B3B5D.7040601@fb.com> Message-ID: References: <555B3B5D.7040601@fb.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-nfs-owner@vger.kernel.org List-ID: On Tue, 19 May 2015, Josef Bacik wrote: > On 05/19/2015 03:55 AM, Govindarajulu Varadarajan wrote: >> Hi all >> >> I am seeing the following crash on my btrfs filesystem with nfs export. >> If I disable the nfs share and reboot, I do not hit the crash. Look like >> the crash happens on btrfs with nfs export. >> >> Is this a known issue? Has anyone else faced this? Let me know if you >> need more >> information. >> > > Somebody else is unlocking the page while we have it locked (by somebody else > I mean somebody other than in this particular code path, so could totally > still be us, it's just not obvious.) What are your mount options? Are you > capable of building your own kernel? A git bisect would be good to try and > find where the problem was introduced, seems like it's easy to reproduce. > I'll look through our recent commits and see if anything pops out. Thanks, > Yes, I can do git bisect. But, now that I have deleted the file with csum error I do not see the crash any more. Sorry. Is there any was to introduce "BTRFS info (device sdf): csum failed ino 1154 extent 4434247680 csum 1388825687 wanted 0 mirror 0"?