linux-ext4 - Re: [PATCH v2] ext4: Fix a BUG in mb_mark

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Message-ID: <20110323194719.GB2548@thunk.org>
Date:	Wed, 23 Mar 2011 15:47:19 -0400
From:	Ted Ts'o <tytso@....edu>
To:	Tao Ma <tm@....ma>
Cc:	linux-ext4@...r.kernel.org, Lukas Czerner <lczerner@...hat.com>
Subject: Re: [PATCH v2] ext4: Fix a BUG in mb_mark_used during trim.

Thanks, added to the ext4 patch queue.  My apologies for the delay.

	      	     	  	- Ted

On Thu, Mar 03, 2011 at 09:59:34PM +0800, Tao Ma wrote:
> From: Tao Ma <boyu.mt@...bao.com>
> 
> In a bs=4096 volume, if we call FITRIM with the following parameter as
> fstrim_range(start = 102400, len = 134144000, minlen = 10240),
> we will trigger a BUG_ON.
> BUG_ON(start + len > (e4b->bd_sb->s_blocksize << 3));
> 
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