[PATCH v2 0/5] Increase SCSI IOPS

[Bart Van Assche <bvanassche@acm.org>]

Hi Martin,

This patch series increases scsi_debug IOPS by 5% on my test setup by disabling
SCSI budget management if it is not needed.

Please consider this patch series for the next merge window.

Thanks,

Bart.

Changes compared to v1 (https://lore.kernel.org/linux-scsi/20250910213254.1215318-1-bvanassche@acm.org/):
 - Added three block layer patches to introduce the function
   blk_mq_tagset_iter().
 - Applied the optimization not only for host-wide tags but also if there is
   only a single hardware queue.
 - Renamed scsi_device_check_in_flight() into scsi_device_check_allocated().
 - Added support for set->shared_tags == NULL in scsi_device_busy().

Bart Van Assche (5):
  block: Rename busy_tag_iter_fn into blk_mq_rq_iter_fn
  block: Introduce __blk_mq_tagset_iter()
  block: Introduce blk_mq_tagset_iter()
  scsi: core: Generalize scsi_device_busy()
  scsi: core: Improve IOPS in case of host-wide tags

 block/blk-mq-tag.c         | 67 ++++++++++++++++++++++++++------------
 block/blk-mq.h             |  4 +--
 drivers/scsi/scsi.c        |  3 +-
 drivers/scsi/scsi_lib.c    | 38 +++++++++++++++++++++
 drivers/scsi/scsi_scan.c   | 18 +++++++++-
 include/linux/blk-mq.h     |  6 ++--
 include/scsi/scsi_device.h |  5 +--
 7 files changed, 110 insertions(+), 31 deletions(-)