From: Liu Bo <bo.li.liu@oracle.com>
To: Stefan Behrens <sbehrens@giantdisaster.de>
Cc: tubalcane@earthlink.net, linux-btrfs@vger.kernel.org
Subject: Re: crash while trying to access corrupt fs
Date: Mon, 27 Aug 2012 23:31:41 +0800 [thread overview]
Message-ID: <503B92DD.4010804@oracle.com> (raw)
In-Reply-To: <503B561A.1060203@giantdisaster.de>
On 08/27/2012 07:12 PM, Stefan Behrens wrote:
> On Sun, 26 Aug 2012 16:07:33 -0400 (EDT), tubalcane wrote:
>> I'm primarily interested in the block level checksums of files and the
>> scrubbing
>> feature to detect corrupt files. Currently I use ext4 and create and keep
>> md5sums of everything which is tedious but I care about my data (quadruple
>> backups including offsite)
>>
[...]
>> Aug 25 11:37:24 bubblegum kernel: [ 1183.835479] [<ffffffffa04d344a>]
>> btrfs_find_device_for_logical+0x4a/0xa0 [btrfs]
>> Aug 25 11:37:24 bubblegum kernel: [ 1183.836717] [<ffffffffa04c6955>]
>> end_bio_extent_readpage+0x105/0xa80 [btrfs]
>> Aug 25 11:37:24 bubblegum kernel: [ 1183.837938] [<ffffffff81173569>] ?
>> kfree+0x139/0x160
>> Aug 25 11:37:24 bubblegum kernel: [ 1183.839157] [<ffffffff811baaad>]
>> bio_endio+0x1d/0x40
>> Aug 25 11:37:24 bubblegum kernel: [ 1183.840395] [<ffffffffa049be81>]
>> end_workqueue_fn+0x41/0x50 [btrfs]
>> Aug 25 11:37:24 bubblegum kernel: [ 1183.841635] [<ffffffffa04d4d46>]
>> worker_loop+0x136/0x580 [btrfs]
>
> That crash is a bug which I have introduced with the IO error stats. It can happen after checksum errors are detected.
> I'll send a patch to (temporarily) remove the counting for checksum errors in the IO error stats.
Just out of curiosity, isn't it fixable due to your design, Stefan?
Why not try to fix the bug?
thanks,
liubo
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next prev parent reply other threads:[~2012-08-27 15:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-26 20:07 crash while trying to access corrupt fs tubalcane
2012-08-27 11:12 ` Stefan Behrens
2012-08-27 15:31 ` Liu Bo [this message]
2012-08-27 16:12 ` Stefan Behrens
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