linux-kernel - Re: [3.4-rc1] attempt to access beyond end of device and livelock

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Message-ID: <CAMVG2staWGn6uUic3=ALYpT8MpkED3xUP2WCuMUnRSVcsjEN0A@mail.gmail.com>
Date:	Mon, 9 Apr 2012 22:44:23 +0800
From:	Daniel J Blueman <daniel@...ra.org>
To:	Liu Bo <liubo2009@...fujitsu.com>
Cc:	Josef Bacik <josef@...hat.com>,
	Chris Mason <chris.mason@...cle.com>,
	Linux BTRFS <linux-btrfs@...r.kernel.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [3.4-rc1] attempt to access beyond end of device and livelock

On 8 April 2012 16:49, Liu Bo <liubo2009@...fujitsu.com> wrote:
> On 04/06/2012 07:36 PM, Daniel J Blueman wrote:
>> Hi Josef, Chris,
>>
>> When testing BTRFS with RAID 0 metadata on linux-3.4-rc1, we see
>> discard ranges exceeding the end of the block device [1], potentially
>> causing dataloss; when this occurs, filesystem writeback becomes
>> catatonic due to continual resubmission.
[]
> Thanks for the report, this bug shows we've miscalculated the length of discard extents.
>
> I'll send a patch for this soon.

The patch test out well here on 3.4-rc2. Thanks Bo!

Daniel
-- 
Daniel J Blueman
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