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Jens Axboe c125311d96 blk-wbt: don't maintain inflight counts if disabled 
A previous commit removed the ability to have per-rq flags. We used
those flags to maintain inflight counts. Since we don't have those
anymore, we have to always maintain inflight counts, even if wbt is
disabled. This is clearly suboptimal.

Add a queue quiesce around changing the wbt latency settings from sysfs
to work around this. With that, we can reliably put the enabled check in
our bio_to_wbt_flags(), since we know the WBT_TRACKED flag will be
consistent for the lifetime of the request.

Fixes: c1c80384c8 ("block: remove external dependency on wbt_flags")
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2018-08-23 09:34:46 -06:00
..
partitions partitions/aix: append null character to print data from disk 2018-07-27 09:17:41 -06:00
badblocks.c
bfq-cgroup.c block, bfq: return nbytes and not zero from struct cftype .write() method 2018-08-16 13:11:16 -06:00
bfq-iosched.c block, bfq: reduce write overcharge 2018-08-16 13:08:13 -06:00
bfq-iosched.h block, bfq: add/remove entity weights correctly 2018-07-09 09:07:52 -06:00
bfq-wf2q.c block, bfq: improve code of bfq_bfqq_charge_time 2018-08-16 13:08:15 -06:00
bio-integrity.c block: move bio_integrity_{intervals,bytes} into blkdev.h 2018-07-26 15:49:41 -06:00
bio.c for-4.19/block-20180812 2018-08-14 10:23:25 -07:00
blk-cgroup.c blk-cgroup: hold the queue ref during throttling 2018-08-01 09:16:03 -06:00
blk-core.c for-4.19/post-20180822 2018-08-22 13:38:05 -07:00
blk-exec.c
blk-flush.c block: fix use-after-free in block flush handling 2018-06-09 06:37:14 -06:00
blk-integrity.c
blk-ioc.c block, mm: remove unnecessary __GFP_HIGH flag 2018-07-09 09:07:54 -06:00
blk-iolatency.c block: make iolatency avg_lat exponentially decay 2018-08-02 09:58:14 -06:00
blk-lib.c block: fix infinite loop if the device loses discard capability 2018-07-09 09:07:54 -06:00
blk-map.c
blk-merge.c
blk-mq-cpumap.c
blk-mq-debugfs-zoned.c block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n 2018-07-09 09:07:52 -06:00
blk-mq-debugfs.c blk-mq: dequeue request one by one from sw queue if hctx is busy 2018-07-09 09:07:53 -06:00
blk-mq-debugfs.h block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n 2018-07-09 09:07:52 -06:00
blk-mq-pci.c blk-mq: code clean-up by adding an API to clear set->mq_map 2018-07-09 09:07:53 -06:00
blk-mq-rdma.c
blk-mq-sched.c blk-mq: init hctx sched after update ctx and hctx mapping 2018-08-21 09:02:55 -06:00
blk-mq-sched.h blk-mq: init hctx sched after update ctx and hctx mapping 2018-08-21 09:02:55 -06:00
blk-mq-sysfs.c
blk-mq-tag.c for-4.19/post-20180822 2018-08-22 13:38:05 -07:00
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c for-4.19/post-20180822 2018-08-22 13:38:05 -07:00
blk-mq.h blk-mq: issue directly if hw queue isn't busy in case of 'none' 2018-07-17 16:04:00 -06:00
blk-rq-qos.c blk-rq-qos: make depth comparisons unsigned 2018-07-22 11:30:53 -06:00
blk-rq-qos.h blk-rq-qos: make depth comparisons unsigned 2018-07-22 11:30:53 -06:00
blk-settings.c block: allow max_discard_segments to be stacked 2018-07-24 14:46:39 -06:00
blk-softirq.c block: fix timeout changes for legacy request drivers 2018-06-19 11:27:18 -06:00
blk-stat.c blk-stat: export helpers for modifying blk_rq_stat 2018-07-09 09:07:54 -06:00
blk-stat.h blk-stat: export helpers for modifying blk_rq_stat 2018-07-09 09:07:54 -06:00
blk-sysfs.c blk-wbt: don't maintain inflight counts if disabled 2018-08-23 09:34:46 -06:00
blk-tag.c for-linus-20180616 2018-06-17 05:37:55 +09:00
blk-throttle.c Blk-throttle: reduce tail io latency when iops limit is enforced 2018-08-09 12:43:16 -06:00
blk-timeout.c blk-mq: Fix timeout handling in case the timeout handler returns BLK_EH_DONE 2018-06-23 10:25:45 -06:00
blk-wbt.c blk-wbt: don't maintain inflight counts if disabled 2018-08-23 09:34:46 -06:00
blk-wbt.h block: remove external dependency on wbt_flags 2018-07-09 09:07:54 -06:00
blk-zoned.c block: Remove a superfluous cast from blkdev_report_zones() 2018-07-09 09:07:52 -06:00
blk.h blk-mq: init hctx sched after update ctx and hctx mapping 2018-08-21 09:02:55 -06:00
bounce.c block: unexport bio_clone_bioset 2018-07-24 14:43:26 -06:00
bsg-lib.c block/bsg-lib: use PTR_ERR_OR_ZERO to simplify the flow path 2018-08-01 09:13:03 -06:00
bsg.c Linux 4.18-rc6 2018-08-05 19:32:09 -06:00
cfq-iosched.c cfq: Suppress compiler warnings about comparisons 2018-08-07 17:57:13 -06:00
cmdline-parser.c
compat_ioctl.c
deadline-iosched.c
elevator.c blk-mq: init hctx sched after update ctx and hctx mapping 2018-08-21 09:02:55 -06:00
genhd.c block: Track DISCARD statistics and output them in stat and diskstat 2018-07-18 08:44:22 -06:00
ioctl.c
ioprio.c
Kconfig block: introduce blk-iolatency io controller 2018-07-09 09:07:54 -06:00
Kconfig.iosched
kyber-iosched.c
Makefile block: introduce blk-iolatency io controller 2018-07-09 09:07:54 -06:00
mq-deadline.c
noop-iosched.c
opal_proto.h
partition-generic.c block: Track DISCARD statistics and output them in stat and diskstat 2018-07-18 08:44:22 -06:00
scsi_ioctl.c
sed-opal.c block: sed-opal: Fix a couple off by one bugs 2018-06-20 12:04:06 -06:00
t10-pi.c block: move dif_prepare/dif_complete functions to block layer 2018-07-30 08:27:02 -06:00