> Fusion adapters can steer completions to individual queues, so we can enable > blk-mq for those adapters. > And in doing so we can rely on the interrupt affinity from the block layer and > drop the hand-crafted 'reply_map' construct.
Hannes, I understand the intend of this patch as we discussed couple of time on same topic in past. We really don't need such interface in MR/IT HBA because we have single submission queue (h/w registers.). Mimicing multiple h/w submission queue really does not help any performance. Relevant discussion at below - https://marc.info/?l=linux-scsi&m=153078454611933&w=2 We can hit max h/w and storage performance limit using nr_hw_queues = 1. We could not find any reason to really setup more than one hw queue. Kashyap
