On Wed, Mar 08, 2017 at 04:28:06PM +0100, Jan Kara wrote: > Well, that's not really good. If we cannot support this for both blk-mq and > legacy block layer the feature will not be usable. So please work on blk-mq > support as well. Exactly. In addition to that anything implementing a feature for the legacy request request code but not blk-mq is grounds for an instant NAK.