On Fri, 2017-09-01 at 20:36 +0900, Damien Le Moal wrote: > In the case of a ZBC disk used with scsi-mq, zone write locking does > not prevent write reordering in sequential zones. Unlike the legacy > case, zone locking can only be done after the command request is > removed from the scheduler dispatch queue. That is, at the time of > zone locking, the write command may already be out of order. > > Disable zone write locking in sd_zbc_write_lock_zone() if the disk is > used with scsi-mq. Write order guarantees can be provided by an > adapted I/O scheduler. Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxx>
