lvm2 snapshot-merge in debian?

[Joan]

Good morning.

I have been looking for the availability of snapshot merging in debian
for a while. I couldn't find any information about about availabilty
on debian  tough.

Basically this is a new option of lvm2, that allows the user to
rollback to a previous snapshot. Some information can be found here.
http://alinux.tv/Kernel-2.6.34/device-mapper/snapshot.txt

Also some information can be found here:
http://www.webservertalk.com/archive368-2011-1-2358911.html

Anyone have experienced with this?