Re: ext2/3/4: punch support?

[Dave Young]

On Mon, Feb 28, 2011 at 9:11 PM, Josef Bacik <josef@xxxxxxxxxx> wrote:
> On Mon, Feb 28, 2011 at 03:03:40PM +0800, Dave Young wrote:
>> Hi, josef and ext guys
>>
>> Do you have any plan with ext4 hole punching support? And the
>> fallocate for ext2/3?
>>
>> What's the obstacle to work on this? could someone tell the status of
>> this issue?
>
> There is no obstacle, just nobody has bothered to do it. ÂIf you want to do it
> go for it. ÂThanks,

Yes, I want to do some kvm image space discard stuff,
I use ext4 as my filesystem, but currently only xfs support something
like trim/discard.

I know general knowledge about ext filesystem, but nearly new to ext4 code,
could you give some hint where to start?

--
Thanks
dave
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