On Thu, Aug 17, 2017 at 11:45:50AM +0900, Damien Le Moal wrote: > blk-mq may not maintain write requests order at dispatch time. So host > managed drives will not reliably work. Worse, potential reordering of > write requests on requeue may cause the zone write locking code to > deadlock command dispatch to the disk. So for now, until the write > ordering issue is fixed, do not support zoned block devices with > scsi-mq by showing a 0 LBA capacity disk. NAK. Please fix the issue instead of this.