linux-ext4 - Re: [PATCH 1/2] ext4: quota_write cross block boundary behaviour

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Date:	Tue, 2 Mar 2010 08:15:32 -0500
From:	tytso@....edu
To:	Dmitry Monakhov <dmonakhov@...nvz.org>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH 1/2] ext4: quota_write cross block boundary behaviour

On Tue, Mar 02, 2010 at 12:37:43PM +0300, Dmitry Monakhov wrote:
> Jan Kara <jack@...e.cz> writes:
> 
> > On Tue 16-02-10 19:33:41, Dmitry Monakhov wrote:
> >> We always assume what dquot update result in changes in one data block
> >> But ext4_quota_write() function may handle cross block boundary writes
> >> In fact if this ever happen it will result in incorrect journal credits
> >> reservation. And later bug_on triggering. As soon this never happen the
> >> boundary cross loop is NOOP. In order to make things straight
> >> let's remove this loop and assert cross boundary condition.
> >> 
> >> Signed-off-by: Dmitry Monakhov <dmonakhov@...nvz.org>
> >   Yeah, originally I thought it might be useful to support a possibility of
> > multiblock writes but in the end we never needed it and currently e.g. OCFS2
> > would already BUG on that so yes, this is a good simplification.
> >   Acked-by: Jan Kara <jack@...e.cz>
> >
> >   I've merged the ext3 version of the patch into my tree. Ted, will you
> > merge this ext4 cleanup please?
> Ted please take a look at the patch.

Sorry, I had lost track of this patch.  I've added it to the ext4 patch queue.

       	     	  	   		- Ted
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