linux-ext4 - Re: [PATCH v1] ext4:Make FIEMAP and delayed allocation play well together.

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Message-ID: <4D66DA45.5050201@redhat.com>
Date:	Thu, 24 Feb 2011 16:23:01 -0600
From:	Eric Sandeen <sandeen@...hat.com>
To:	Yongqiang Yang <xiaoqiangnk@...il.com>
CC:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH v1] ext4:Make FIEMAP and delayed allocation play well
 together.

On 02/24/2011 10:15 AM, Yongqiang Yang wrote:
> 1. lookup dirty pages with specified range in pagecache.
>    If no page is got, then there is no delayed-extent and
>    return with EXT_CONTINUE.
> 2. find the 1st mapped buffer,
> 3. check if the mapped buffer is both in the request range
>    and a delayed buffer. If not, there is no delayed-extent,
>    then return.
> 4. a delayed-extent is found, the extent will be collected.

This does seem to work now; I patched xfstests to do a run
with and without sync, and both pass.

The patches for xfstests are here:

http://oss.sgi.com/pipermail/xfs/2011-February/049525.html
http://oss.sgi.com/pipermail/xfs/2011-February/049527.html

-Eric
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