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Date:	Thu, 14 Apr 2011 22:34:38 +0800
From:	Yongqiang Yang <>
To:	"Ted Ts'o" <>
Subject: Re: [PATCH REC 0/3] ext4:Factor common code from convert and split unwritten.

On Thu, Apr 14, 2011 at 10:14 PM, Ted Ts'o <> wrote:
> On Wed, Apr 13, 2011 at 10:40:48PM -0700, Yongqiang Yang wrote:
>> These patches factor common code from ext4_ext_convert_to_initialized() and
>> ext4_split_unwritten_extents(), so that extent-move-on-write in snapshot and
>> punch-hole can be built on the common code as well.
>> ext4:Add a function merging extent right and left.
>> ext4:Add two functions splitting an extent.
>> ext4:Reimplement convert and split_unwritten.
> Hi Yongqiang,
> I'd like to hear back from Mingming and Allison about whether these
> patches conflict with their punch patches, since my understanding was
> they were planning on doing very similar things (and at least would be
> working in the very similar parts of the code).
> I agree that the extents code here could definitely use this cleanup,
> and I'm really glad that you worked on this; thank you!  I just want
> to make sure work you are doing is coordinated with the work that
> Allison and Mingming are working on.

I knew it and Mingming told me that common code should be factor out
in previous emails.  so I cced patches to Mingming and Allison.
extent-move-on-write in ext4-snapshots needs a function splitting an
initialized extent.

These patches indeed need advices, reviews  and even tests from
Mingming and Allison.

Thank you,
>                                                - Ted

Best Wishes
Yongqiang Yang
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