Re: snapshot-removal - timeline ?

[Chris Mason <chris.mason@oracle.com>]

On Tue, Aug 04, 2009 at 09:52:51AM +0200, Roy Sigurd Karlsbakk wrote:
> On 3. aug.. 2009, at 18.18, Chris Mason wrote:
> >On Mon, Aug 03, 2009 at 04:33:13PM +0200, Roy Sigurd Karlsbakk wrote:
> >>On 3. aug.. 2009, at 15.04, Chris Mason wrote:
> >>
> >>>On Sat, Aug 01, 2009 at 02:03:37PM +0200, Roland wrote:
> >>>>Hello,
> >>>>
> >>>>is there a timeline for snapshot-removal ?
> >>>>
> >>>>i did intensively play with btrfs about a year ago and was really
> >>>>impressed, but i quit due to the lack of snapshot removal.
> >>>>(i tried btrfs mostly because of the snapshot feature)
> >>>>
> >>>>has there been some progress on this or is there a timeline when
> >>>>this feature will be available ?
> >>>>
> >>>>i wonder if it`s just so hard to implement or if it`s  just too low
> >>>>priority on the todo list..... maybe both ? ;)
> >>>
> >>>Its a little of both ;)  The plan is to have this in 2.6.32
> >>
> >>
> >>Last I heard, someone was saying .31... Is it being moved?
> >
> >Yes, it was delayed so we could finalize the other changes in .31.
> 
> 
> It's strange that such a small thing should be delayed so much. If
> snapshot removal was working, I'm quite sure we might get more users
> and thereby more stable code faster.

It's a small feature but it gets deep into the difficult parts of the
dentry cache to do it right.  So, it definitely isn't easy.

-chris