linux-ext4 - Re: [Ext4 punch hole 1/5] Ext4 Punch Hole Support: Convert Blocks to Uninit Exts

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Date:	Thu, 10 Mar 2011 13:40:13 +0800
From:	Dave Young <hidave.darkstar@...il.com>
To:	Allison Henderson <achender@...ux.vnet.ibm.com>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [Ext4 punch hole 1/5] Ext4 Punch Hole Support: Convert Blocks to
 Uninit Exts

On Tue, Mar 1, 2011 at 11:08 AM, Allison Henderson
<achender@...ux.vnet.ibm.com> wrote:
> Hi All!
>
> This is the patch series for ext4 punch hole that I have been working on.
> There is still a little more debugging that I would like to do with it,
> but I've had some requests to see the patch, so I'm sending it out a bit
> early.  Any feed back is appreciated.  Thx!
>

Hi, aliison

Do you have new version of the patchset which address the comments here?
If they are not ready to send to list, you can send to me, I would like to test.

I tested this patchset for kvm guest image cleanup.
Host ext4 + guest ext4
guest side use lukas's fstrim tool, host side use a modified version
of Christoph's qemu block discard patch

there's many error like following:
[62834.936374] EXT4-fs error (device sda7): ext4_ext_lookup_hole:2907:
inode #1310744: comm qemu-system-x86: bad header/extent: invalid magic
- magic 0, entries 0, max 256(0), depth 256(0)
[62834.936616] EXT4-fs error (device sda7): ext4_ext_lookup_hole:2907:
inode #1310744: comm qemu-system-x86: bad header/extent: invalid magic
- magic 0, entries 0, max 256(0), depth 256(0)
bad header/extent: invalid magic - magic 0, entries 0, max 256(0), depth 256(0)
Then host pc hangs there.

BTW, host xfs + guest ext4 works well for me.

--
Thanks
Dave
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