On Thu, 6 Aug 2009, Alasdair G Kergon wrote: > On Thu, Aug 06, 2009 at 12:14:17PM +0100, Mark McLoughlin wrote: > > We should error all barriers, even empty barriers, on devices like > > virtio_blk which don't support them. > > Have you considered whether or not virtio_blk actually needs to > support empty barriers? > > Alasdair This is only for request-based drivers, where it is the responsibility of blk-core to translate barriers. I think the empty barrier request anyway in blk_do_ordered, but with an error message. So the patch changes it to discard it early and queitly. It seems ok. Mikulas -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
