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Date:	Tue, 26 Apr 2011 12:08:52 -0700
From:	Allison Henderson <>
To:	Yongqiang Yang <>
Subject: Re: [PATCH RFC v1 0/5]Factor common code from convert and split unwritten.

On 4/23/2011 1:44 AM, Yongqiang Yang wrote:
> v0->v1:
>     fix a bug in ext4_ext_convert_to_initialized() reported by
>     Allison<>.
>     optimize ext4_ext_convert_to_initialized().
> -- factor common code
>     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.
> -- optimization
>     the 4th and the 5th patch optimize ext4_ext_convert_to_initialized() by
>     zeroing out in memory.
> [PATCH RFC v1 1/5] ext4:Add a function merging extent right and left.
> [PATCH RFC v1 2/5] ext4:Add two functions splitting an extent.
> [PATCH RFC v1 3/5] ext4:Reimplement convert and split_unwritten.
> [PATCH RFC v1 4/5] ext4: Add a function ext4_ext_zeroout_mem().
> [PATCH RFC v1 5/5] ext4: optimize ext4_ext_convert_to_initialized().
> --
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Hi there,

Just an update on your patch set.  Im am working on getting the punch 
hole patch to work with this new set, but I'm am having trouble getting 
it through the stress test.  It gets up to around 48265 file operations, 
and then hangs. So I am currently trying to narrow down the problem.  It 
looks like it does it with or with out the extra punch hole patches, but 
you may need to enable fallocate in the fsx Makefile to recreate the 
problem.  I will keep you posted if I find any more clues.

Allison Henderson
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