On 5 Apr 2016, at 00:08, Wouter Verhelst <w...@uter.be> wrote: > > if bit 0 in the latter field is set, that means the block is allocated > on the original device > if bit 1 is set, that means the block is allocated on the first-level > snapshot > if bit 2 is set, that means the block is allocated on the second-level > snapshot
This is what I originally thought Eric was proposing. The issue is that in common servers the 'dirtiness' is at a different allocation / blocksize from the allocation status. So you really want 2 different bitmaps. -- Alex Bligh
