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Re: XFS kernel BUG at fs/buffer.c:470! with

To: Jan Kara <jack@xxxxxxx>
Subject: Re: XFS kernel BUG at fs/buffer.c:470! with
From: Alessandro Bono <alessandro.bono@xxxxxxxxx>
Date: Fri, 27 Feb 2009 10:22:27 +0100
Cc: Dave Chinner <david@xxxxxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, linux-xfs <linux-xfs@xxxxxxxxxxx>, linux-kernel <linux-kernel@xxxxxxxxxxxxxxx>
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On Thu, 2009-02-26 at 17:58 +0100, Jan Kara wrote:

>   Hmm, are you still able to reproduce the problem? As I'm looking into
> registers in your dump, no register really seems to contain sensible page
> flags so it could be some corruption of page pointer. If you are still
> able to reproduce, could you please do so with the attached patch
> applied? It will dump us much more information... Thanks.
>                                                               Honza


I tried your patch with a and I can recreate bug (ooops
attached). I reformatted my notebook and I used ext3 without lvm or
dm_crypt as root fs
As target disk I used a usb hd, with plain xfs or xfs over dm_crypt with
a quick test (50G of data) I can't hit bug, but with xfs over lvm over
dm_crypt (the condition of my root fs before reformatting) I have hit
bug after ~80G  of data

some other information attached
if you need I can do a full test with plain xfs or xfs over dm_crypt
(this we maybe I have enough time)


Cordiali Saluti
Alessandro Bono

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