On Thu, Nov 19 2009 at 6:25am -0500, Andi Kleen <andi@xxxxxxxxxxxxxx> wrote: > Mike Snitzer <snitzer@xxxxxxxxxx> writes: > > > snapshot-merge target, quilt tree is maintained here: > > http://people.redhat.com/msnitzer/patches/snapshot-merge/kernel/2.6.33/ > > It might seem trivial to you, but afaik nothing in the whole series > (nor in the comments in the code) says what snapshot merging > actually is. Please write meaningful changelogs and comments. OK, I hadn't noticed because I was so focused on the details. DM (and LVM) snapshot merging allows a snapshot (its COW store) to be merged back into the snapshot's origin device. One expected use of snapshot merging is rollback of a root filesystem after system upgrades (e.g.: yum update). Mike -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
