Tejun Heo
377a8744c3
iocost: over-budget forced IOs should schedule async delay ...
commit d7bd15a138aef3be227818aad9c501e43c89c8c5 upstream.
When over-budget IOs are force-issued through root cgroup,
iocg_kick_delay() adjusts the async delay accordingly but doesn't
actually schedule async throttle for the issuing task. This bug is
pretty well masked because sooner or later the offending threads are
gonna get directly throttled on regular IOs or have async delay
scheduled by mem_cgroup_throttle_swaprate().
However, it can affect control quality on filesystem metadata heavy
operations. Let's fix it by invoking blkcg_schedule_throttle() when
iocg_kick_delay() says async delay is needed.
Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 7caa47151astable@vger.kernel.org
Reported-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-31 16:46:19 +01:00
docs: admin-guide: add a series of orphaned documents
2019-07-15 11:03:02 -03:00
bfq: Add per-device weight
2019-09-06 14:33:52 -06:00
block, bfq: deschedule empty bfq_queues not referred by any process
2019-11-14 07:00:54 -07:00
bfq: Add per-device weight
2019-09-06 14:33:52 -06:00
bfq: Fix the missing barrier in __bfq_entity_update_weight_prio
2019-09-06 14:33:48 -06:00
block/bio-integrity: fix a memory leak bug
2019-07-11 20:01:21 -06:00
block: fix "check bi_size overflow before merge"
2019-12-21 11:04:32 +01:00
blkcg: make blkcg_print_stat() print stats only for online blkgs
2019-11-06 17:08:38 -07:00
block: centralize PI remapping logic to the block layer
2019-09-17 20:03:49 -06:00
block: fix null pointer dereference in blk_mq_rq_timed_out()
2019-09-27 07:01:25 -06:00
block: centralize PI remapping logic to the block layer
2019-09-17 20:03:49 -06:00
iocost: over-budget forced IOs should schedule async delay
2019-12-31 16:46:19 +01:00
blkcg: s/RQ_QOS_CGROUP/RQ_QOS_LATENCY/
2019-08-28 21:17:08 -06:00
block: remove the bi_phys_segments field in struct bio
2019-06-20 10:29:22 -06:00
block: Improve physical block alignment of split bios
2019-08-04 21:41:29 -06:00
blk-mq: balance mapping between present CPUs and queues
2019-08-04 21:43:12 -06:00
for-5.3/block-20190708
2019-07-09 10:45:06 -07:00
blk-mq: no need to check return value of debugfs_create functions
2019-06-13 03:00:30 -06:00
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq: move lockdep_assert_held() into elevator_exit
2019-09-26 00:45:05 -06:00
block: blk-mq: Remove blk_mq_sched_started_request and started_request
2019-07-23 07:25:09 -06:00
blk-mq: make sure that line break can be printed
2019-12-17 19:56:53 +01:00
blk-mq: introduce blk_mq_tagset_wait_completed_request()
2019-08-04 21:41:29 -06:00
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq: apply normal plugging for HDD
2019-09-27 11:40:21 -06:00
block: Disable write plugging for zoned block devices
2019-07-10 14:18:01 -06:00
block: bypass blk_set_runtime_active for uninitialized q->dev
2019-09-12 07:11:56 -06:00
blk-wbt: fix performance regression in wbt scale_up/scale_down
2019-10-06 09:26:41 -06:00
blk-rq-qos: fix first node deletion of rq_qos_del()
2019-10-15 10:13:13 -06:00
dma-mapping updates for 5.4:
2019-09-19 13:27:23 -07:00
rq-qos: get rid of redundant wbt_update_limits()
2019-09-27 01:13:10 -06:00
block: make rq sector size accessible for block stats
2019-09-15 16:02:08 -06:00
blk-wbt: fix performance regression in wbt scale_up/scale_down
2019-10-06 09:26:41 -06:00
block/rq_qos: implement rq_qos_ops->queue_depth_changed()
2019-08-28 21:17:07 -06:00
blk-zoned: implement REQ_OP_ZONE_RESET_ALL
2019-08-04 21:41:29 -06:00
block: fix null pointer dereference in blk_mq_rq_timed_out()
2019-09-27 07:01:25 -06:00
block: drop device references in bsg_queue_rq()
2019-09-23 11:17:24 -06:00
block: Fix elv_support_iosched()
2019-10-14 13:54:09 -06:00
block: Delay default elevator initialization
2019-09-05 19:52:34 -06:00
docs: block: convert to ReST
2019-07-15 09:20:27 -03:00
blkcg: implement blk-iocost
2019-08-28 21:17:12 -06:00
docs: block: convert to ReST
2019-07-15 09:20:27 -03:00
blk-mq: remove blk_mq_put_ctx()
2019-07-02 21:03:27 -06:00
blkcg: implement blk-iocost
2019-08-28 21:17:12 -06:00
block: Introduce elevator features
2019-09-05 19:52:33 -06:00
block: sed-opal: Removed duplicate OPAL_METHOD_LENGTH definition
2019-08-20 09:34:49 -06:00
block: sed-opal: fix sparse warning: convert __be64 data
2019-10-03 14:21:32 -06:00
block: t10-pi: fix -Wswitch warning
2019-09-23 08:05:19 -06:00
377a8744c3