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Re: 2.6.15-mm3 bisection: git-xfs.patch makes reiserfs oops

To: Nathan Scott <nathans@xxxxxxx>
Subject: Re: 2.6.15-mm3 bisection: git-xfs.patch makes reiserfs oops
From: Hans Reiser <reiser@xxxxxxxxxxx>
Date: Mon, 16 Jan 2006 01:29:58 -0800
Cc: Andrew Morton <akpm@xxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, reiserfs-dev@xxxxxxxxxxx, linux-xfs@xxxxxxxxxxx, Jeff Mahoney <jeffm@xxxxxxxx>, Mattia Dongili <malattia@xxxxxxxx>
In-reply-to: <20060116094817.A8425113@wobbly.melbourne.sgi.com>
References: <20060110235554.GA3527@inferi.kami.home> <20060110170037.4a614245.akpm@osdl.org> <20060115221458.GA3521@inferi.kami.home> <20060116094817.A8425113@wobbly.melbourne.sgi.com>
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Thanks Nathan, Mattia, and Andrew.

vs, can you or Jeff look at whether our buffer head inits are
sufficiently hardened by next Monday (I know that vs has a lot of mail
to catch up to)?  Jeff, if you have time before then, it would be nice
if you could handle it, I know hardening V3 is an interest of yours.

Thanks,

Hans

 Nathan Scott wrote:

>On Sun, Jan 15, 2006 at 11:14:58PM +0100, Mattia Dongili wrote:
>  
>
>>[CC-in relevant people/ML]
>>
>>Hello!
>>
>>second bisection result!
>>
>>On Tue, Jan 10, 2006 at 05:00:37PM -0800, Andrew Morton wrote:
>>    
>>
>>>Mattia Dongili <malattia@xxxxxxxx> wrote:
>>>      
>>>
>>[...]
>>    
>>
>>>>1- reiser3 oopsed[1] twice while suspending to ram. It seems
>>>>   reproducible (have some activity on the fs and suspend)
>>>>        
>>>>
>>>No significant reiser3 changes in there, so I'd be suspecting something
>>>else has gone haywire.
>>>      
>>>
>>you're right: git-xfs.patch is the bad guy.
>>
>>Unfortunately netconsole isn't helpful in capturing the oops (no serial
>>ports here) but I have two more shots (more readable):
>>http://oioio.altervista.org/linux/dsc03148.jpg
>>http://oioio.altervista.org/linux/dsc03149.jpg
>>    
>>
>
>Hmm, thats odd.  It seems to be coming from:
>reiserfs_commit_page -> reiserfs_add_ordered_list -> __add_jh(inline)
>
>I guess XFS may have left a buffer_head in an unusual state (with some
>private flag/b_private set), somehow, and perhaps that buffer_head has
>later been allocated for a page in a reiserfs write.  Does this patch,
>below, help at all?
>
>I see one BUG check in __add_jh for non-NULL b_private, but can't see
>the top of your console output from the photos - is there a preceding
>line with "kernel BUG at ..." in it?
>
>cheers.
>
>  
>


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