Hi Greg,
Please consider this patchset, which include block/scsi multiqueue performance
enhancement and bugfix.
We've run multiple benchmark and different tests for over one week, looks
good.
These patches are also included in Oracle UEK5.
They're almost just simple cherry-pick, only 2 patches need minor adjust.
They can apply cleanly on 4.14.57.
Jens Axboe (3):
Revert "blk-mq: don't handle TAG_SHARED in restart"
blk-mq: fix issue with shared tag queue re-running
blk-mq: only run the hardware queue if IO is pending
Jianchao Wang (1):
blk-mq: put the driver tag of nxt rq before first one is requeued
Ming Lei (19):
blk-mq-sched: move actual dispatching into one helper
blk-mq: introduce .get_budget and .put_budget in blk_mq_ops
sbitmap: introduce __sbitmap_for_each_set()
blk-mq-sched: improve dispatching from sw queue
scsi: allow passing in null rq to scsi_prep_state_check()
scsi: implement .get_budget and .put_budget for blk-mq
SCSI: don't get target/host busy_count in scsi_mq_get_budget()
blk-mq: don't handle TAG_SHARED in restart
blk-mq: don't restart queue when .get_budget returns BLK_STS_RESOURCE
blk-mq: don't handle failure in .get_budget
blk-flush: don't run queue for requests bypassing flush
block: pass 'run_queue' to blk_mq_request_bypass_insert
blk-flush: use blk_mq_request_bypass_insert()
blk-mq-sched: decide how to handle flush rq via RQF_FLUSH_SEQ
blk-mq: move blk_mq_put_driver_tag*() into blk-mq.h
blk-mq: don't allocate driver tag upfront for flush rq
blk-mq: put driver tag if dispatch budget can't be got
blk-mq: quiesce queue during switching io sched and updating
nr_requests
scsi: core: run queue if SCSI device queue isn't ready and queue is
idle
block/blk-core.c | 2 +-
block/blk-flush.c | 37 +++++--
block/blk-mq-debugfs.c | 1 -
block/blk-mq-sched.c | 203 ++++++++++++++++++++++-------------
block/blk-mq.c | 278 +++++++++++++++++++++++++++---------------------
block/blk-mq.h | 58 +++++++++-
block/elevator.c | 2 +
drivers/scsi/scsi_lib.c | 53 ++++++---
include/linux/blk-mq.h | 20 +++-
include/linux/sbitmap.h | 64 ++++++++---
10 files changed, 475 insertions(+), 243 deletions(-)
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2.7.4
