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Re: [PATCH 1/3] xfs: flag all buffers as metadata

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH 1/3] xfs: flag all buffers as metadata
From: Alex Elder <aelder@xxxxxxx>
Date: Tue, 26 Jul 2011 17:38:55 -0500
Cc: <xfs@xxxxxxxxxxx>
In-reply-to: <20110726150644.GA18000@xxxxxxxxxxxxx>
References: <20110726150633.GA17400@xxxxxxxxxxxxx> <20110726150644.GA18000@xxxxxxxxxxxxx>
Reply-to: <aelder@xxxxxxx>
On Tue, 2011-07-26 at 11:06 -0400, Christoph Hellwig wrote: 
> Now that REQ_META bios aren't treated specially in the CFQ I/O schedule
> anymore, we can tag all buffers as metadata to make blktrace traces more
> meaningful.  Note that we use buffers also to zero out partial blocks
> in the preallocation / hole punching code, and while they operate on
> data blocks the zeros written certainly aren't data.  I think this case
> is borderline metadata enough to not bother special casing it.
> 
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>

This looks good.  I plan to re-base the xfs master branch
after 3.1-rc1 is out, so I'll wait until after that to
commit this (and the others in this series).

If you want me to do something different, let me know.

Reviewed-by: Alex Elder <aelder@xxxxxxx>



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