On Fri, Feb 17, 2017 at 10:00:28AM +0100, Hannes Reinecke wrote: > So here's my question: how are 'reserved' commands are imagined to be used? > ATM they exist for blk-mq solely, and are not even implemented for > legacy sq. Yes. > At the same time quite some drivers (like mpt3sas) really could make use > of the notion of 'reserved' commands. > Does it make sense to implement 'reserved' commands for the legacy sq > code path, too? Yes.