On Wed, Nov 04 2009 at 5:11pm -0500, Mike Snitzer <snitzer@xxxxxxxxxx> wrote: > Until now snapshot_resume only allowed the resuming snapshot to get the > exception store from another snapshot. > > Revise snapshot_resume's exception handover to allow a snapshot to > handover its exceptions to another snapshot prior to resuming. > > This is needed to accomodate the following sequence: > new_snapshot->ctr > old_snapshot->suspend > old_snapshot->resume > new_snapshot->resume > > lvm2 relies on this sequence if 'lvchange --refresh' is used to start a > snapshot merge that was deferred until both origin and snapshot were not > in use. FYI, the above is the last of 3 patches in the "exception handover" series, the patch order is: dm snapshot: initial support for exception handover http://patchwork.kernel.org/patch/55022/ dm snapshot: exception handover improvements http://patchwork.kernel.org/patch/55569/ dm snapshot: revise snapshot_resume's exception handover http://patchwork.kernel.org/patch/57787/ -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
