On Sat, Jan 27, 2018 at 05:05:31PM +0000, Martin Raiber wrote:

On 25.01.2018 06:51 Dave Chinner wrote:

quoted

The video from my talk at LCA 2018 yesterday about the XFS subvolume and
snapshot support I'm working on has been uploaded and can be found
here:

https://www.youtube.com/watch?v=wG8FUvSGROw

I don't have the code in a reviewable form yet - there's still quite
a bit of work before I get to that point, but this is a good
introduction to how all the pieces will fit together....

Great talk!

I'm pretty sure it's hard to add, but cross-subvolume reflinks would be
something useful for my use case.

That's not going to happen. reflinks across subvolumes (i.e. across
independent filesystems) will return -EXDEV. If you want subvolumes
to share data blocks of independent ancestry, then you can run
deduplication operations on the image files.

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com