Hi There three patches fix some discard bugs on dm-thin. The patches should be placed in Alasdair's patchset after "dm-thin-optimize-power-of-two-block-size.patch". They shouldn't be set upstream because the bugs they fix exist only in Alasdair's patchset, not upstream. Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel