On Fri, 2018-01-26 at 08:58 +0100, Christoph Hellwig wrote: > scsi_debug already always uses scsi-mq if enabled. The somewhat > misnamed sdebug_mq_active variable is only used for decoding > multiqueue tags. That being said the blk_mq_unique_tag* helpers > should be safe to use even without blk-mq, so the variable could > probably just be removed entirely. Hello Christoph, Removing sdebug_mq_active sounds like a good idea to me. I will rework this patch. Bart.