[0/5] Improve zoned storage write performance

Message

Bart Van Assche June 14, 2022, 5:49 p.m. UTC

Hi Jens,

Measurements have shown that limiting the queue depth to one per sequential
zone has a significant negative performance impact on zoned UFS devices. Hence
this patch series that increases the queue depth for write commands for
sequential zones.

Please consider this patch series for kernel v5.20.

Thanks,

Bart.

Bart Van Assche (5):
  block: Introduce the blk_rq_is_seq_write() function
  scsi: Retry unaligned zoned writes
  nvme: Make the number of retries request specific
  nvme: Increase the number of retries for zoned writes
  block/mq-deadline: Remove zone locking

 block/mq-deadline.c       | 74 ++++-----------------------------------
 drivers/nvme/host/core.c  |  7 +++-
 drivers/nvme/host/nvme.h  |  1 +
 drivers/scsi/scsi_error.c |  6 ++++
 drivers/scsi/sd.c         |  2 ++
 include/linux/blk-mq.h    | 14 ++++++++
 6 files changed, 35 insertions(+), 69 deletions(-)