[0/3] Improve mq-deadline I/O priority support

Message

Bart Van Assche Dec. 5, 2023, 5:32 a.m. UTC

Hi Jens,

This patch series includes the following changes for the mq-deadline I/O
scheduler:
 - Do not modify the request order if prio_aging_expire is zero. This
   change restores compatibility of the mq-deadline scheduler with MMC
   devices if prio_aging_expire is set to zero.
 - Ignore I/O priorities for zoned writes that are not write append
   operations such that zoned writes happen in LBA order per zone even
   if different write requests have different I/O priorities in a single
   zone.

Please consider these patches for the next merge window.

Thanks,

Bart.

Bart Van Assche (3):
  block/mq-deadline: Use dd_rq_ioclass() instead of open-coding it
  block/mq-deadline: Introduce dd_bio_ioclass()
  block/mq-deadline: Disable I/O prioritization in certain cases

 block/mq-deadline.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)