linux-kernel - Re: btrfs extents related oops.

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Message-ID: <20140805135627.GB25110@redhat.com>
Date:	Tue, 5 Aug 2014 09:56:27 -0400
From:	Dave Jones <davej@...hat.com>
To:	Chris Mason <clm@...com>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: btrfs extents related oops.

On Tue, Aug 05, 2014 at 09:52:46AM -0400, Chris Mason wrote:
 > On 08/05/2014 09:47 AM, Chris Mason wrote:
 > > On 08/04/2014 09:57 PM, Dave Jones wrote:
 > >> On Mon, Aug 04, 2014 at 09:28:45PM -0400, Dave Jones wrote:
 > >>  > Possibly related to some changes I've been making to my fuzz tester today
 > >>  > to operate on the same file from multiple threads.
 > >>  > This was on v3.16-829-g98959948a7ba, but probably exists on earlier trees too
 > >>  > given the lack of btrfs specific commits so far this merge window.
 > >>
 > >> reproducer:
 > >>
 > >> trinity -q -l off -c lseek -c write
 > >>
 > >> (Things also go very, very bad if you then try to umount that
 > >>  partition - endless oopses, too mangled to parse).
 > > 
 > > So we're fuzzing lseek and btrfs goes crazy?  Looking.
 > 
 > Ugh, that's wrong in exciting ways.  Thanks Dave, I'll test a patch with
 > trinity and get it in.

You'll need the latest tree from git to hit this btw.
https://github.com/kernelslacker/trinity

	Dave


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