XFS support for TRIM / blkdev_issue_discard?

[Dave Chinner]

On Tue, Apr 14, 2009 at 01:32:35PM -0500, Felix Blyakher wrote:
>
> On Apr 14, 2009, at 9:44 AM, Peter Niemayer wrote:
>
>> Dear Felix Blyakher,
>
> Hi Peter,
>
>> do you know whether there are plans to support the ATA TRIM command /
>> blkdev_issue_discard() call in XFS for Linux anytime soon?
>
> This topic was indeed brought up in xfs discussions.
> Though, we don't have any definite plans on supporting it yet.

I did some initial work on tracking extents being freed, but then
the TRIM request morphed into a "tell the largest free space around
the area just freed" and that is much harder to do than simply to
issue a "we just freed this bit" command.

Cheers,

Dave.
-- 
Dave Chinner
dgc at evostor.com