On Mon, Jul 20, 2020 at 04:28:26PM -0700, Sagi Grimberg wrote: > On 7/20/20 4:17 PM, Keith Busch wrote: > > On Mon, Jul 20, 2020 at 05:01:19PM -0600, Logan Gunthorpe wrote: > > > On 2020-07-20 4:35 p.m., Sagi Grimberg wrote: > > > > > > > passthru commands are in essence REQ_OP_DRV_IN/REQ_OP_DRV_OUT, which > > > > means that the driver shouldn't need the ns at all. So if you have a > > > > dedicated request queue (mapped to the I/O tagset), you don't need the > > > > ns->queue and we can lose the ns lookup altogether. > > > > We still need a request_queue to dispatch the command. I guess you could > > make a generic one for the controller that isn't tied to a namespace, > > but we lose the fair shared tag allocation. > > What do you mean fair shared tag allocation?
See hctx_may_queue().
