Xiaoguang, > For scsi commands that are known to be completed in non-interrupt > context, scsi_done_direct() calling blk_mq_complete_request_direct() > can be used to completes commands directly instead deferring it > to softirq, which can give throughput improvement. https://lore.kernel.org/all/20220201210954.570896-1-sebastian@xxxxxxxxxxxxx/ -- Martin K. Petersen Oracle Linux Engineering