XFS support for TRIM / blkdev_issue_discard?

[Peter Niemayer]

Felix Blyakher wrote:
>> 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.
> That doesn't mean that we oppose to it, just the lack of
> resources at the moment.
> Your mail will bring it up for discussion again.

Thanks a lot for your information!

Of course, I volunteer to help with testing & qualified feed-back.
I might even help with the implementation if you can tell me
where to look for the (hopefully well defined ;-) place in the
filesystem code where sectors become known not to contain relevant
data anymore.
But since I'm unfamiliar with kernel-filesystem programming, it
might take longer answering my questions then somebody involved
with XFS already would need to insert the blkdev_issue_discard()
calls.

Regards,

Peter Niemayer