linux-kernel - Re: [PATCH] ext4: BUG_ON could be triggered in ext4_mb_normalize

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Message-ID: <g2xac8f92701004070956j9b70ec83x215f444b21650949@mail.gmail.com>
Date:	Thu, 8 Apr 2010 00:56:30 +0800
From:	jing zhang <zj.barak@...il.com>
To:	tytso@....edu
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ext4: BUG_ON could be triggered in ext4_mb_normalize_request()

2010/4/7, tytso@....edu <tytso@....edu>:
> On Wed, Apr 07, 2010 at 09:51:46PM +0800, jing zhang wrote:
>> From: Jing Zhang <zj.barak@...il.com>
>>
>> Date: Wed Apr 7 21:34:48     2010
>>
>> BUG_ON at [line: 2912] could be triggered,
>>      if (pa->pa_deleted == 0 && pa->pa_free == 0)
>> as checked at [line: 3111] and [line: 3122].
>
> Please don't use line numbers, as line numbers may not be the same in
> your version and my version.  Secondly, please give a high-level
> scenario where this could happen.
>
> 					- Ted
>

My duty is not over, and I think, more check seems necessary.

          - zj
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