[dm-devel] Discard support for dm-snap

[Hannes Reinecke]

Hi all,

now that we've got discard support in the block layer, are there plans
to update dm-snap to actually implement discard?
Looks like a valid addendum here; we could be freeing up unused blocks
thus freeing up space.
Especially helpful when using dm-snap to create a sparse device;
cf
http://www.mjmwired.net/kernel/Documentation/device-mapper/zero.txt

Thoughts?

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
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