linux-kernel - Re: ext4 blocks up

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Message-ID: <4FF1D22D.2070804@redhat.com>
Date:	Mon, 02 Jul 2012 11:54:05 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	"Theodore Ts'o" <tytso@....edu>,
	Artem Bityutskiy <dedekind1@...il.com>,
	Ext4 Mailing List <linux-ext4@...r.kernel.org>,
	Linux FS Maling List <linux-fsdevel@...r.kernel.org>,
	Linux Kernel Maling List <linux-kernel@...r.kernel.org>
Subject: Re: ext4 blocks up

On 07/02/2012 11:45 AM, Theodore Ts'o wrote:
> On Mon, Jul 02, 2012 at 11:14:42AM -0400, Theodore Ts'o wrote:
>> On Mon, Jul 02, 2012 at 05:54:22PM +0300, Artem Bityutskiy wrote:
>>> On Mon, 2012-07-02 at 10:44 -0400, Theodore Ts'o wrote:
>>>> Can you tell me *which* xfstest this was blocking on?
>>>
>>> Test 068 which runs fsstress.
>>
>> Hmmm, I had just started an xfstests -g auto run using standard ext4
>> defaults with 3.5-rc2, and I'm not noting any problems.  And I've
>> gotten past test 68 w/o any problems.
> 
> I just tried again with 3.5-rc5, and I was able to reproduce your
> failure by using "check 68 68 68 68 68" (it failed after the 2nd time
> it ran the fsstress test.  What's interesting is that there have been
> no changes in fs/ext4 or fs/jbd2 since 3.5-rc2.  So this may have been
> caused by a writeback related change; I'm starting a bisect now.

Isn't this just part of the whole class of filesystem freeze races Jan
has been trying to work out?

-Eric
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