On Mon, Oct 05 2009 at 3:00pm -0400, Mike Snitzer <snitzer@xxxxxxxxxx> wrote: > From: Mikulas Patocka <mpatocka@xxxxxxxxxx> > > Rework writing to snapshot origin. > > The previous code selected one exception as "primary_pe", linked all other > exceptions on it and used reference counting to wait until all exceptions are > reallocated. This didn't work with exceptions with different chunk sizes: > https://bugzilla.redhat.com/show_bug.cgi?id=182659 > > I removed all the complexity with exceptions linking and reference counting. > Currently, bio is linked on one exception and when that exception is > reallocated, the bio is retried to possibly wait for other exceptions. > > Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx> > Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx> FYI, I added my "Signed-off-by" because I had to update this patch to account for changes from these upstream linux-2.6 commits: 2913808e (dm snapshot: refactor __find_pending_exception) c6621392 (dm snapshot: avoid dropping lock in __find_pending_exception) 0cea9c78 (dm exception store: move dm_target pointer) -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
