On Tue, 2017-08-08 at 13:17 +0900, Damien Le Moal wrote:
> Releasing the write lock of a zone when the write commnand that
^^^^^^^^
command?
> acquired the lock completes can cause deadlocks with scsi-mq due to
> potential queue reordering if the lock owning request is requeued and
> not executed.
Please note that even with scsi-sq requeueing can cause request reordering.
> Since sd_uninit_cmnd() is always called when a request is requeued,
> call sd_zbc_write_unlock_zone() from that function for write requests
> that acquired a zone lock. Acquisition of a zone lock by a write command
> is indicated using the new command flag SCMD_ZONE_WRITE_LOCK.
Hello Damien,
Since this patch differs slightly from the version that was posted a few
days ago, should a "v2" label have been added to the subject and should a
changelog have been included? Anyway:
Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxx>
