Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Paolo Valente 39a7082195 block, bfq: do not plug I/O for bfq_queues with no proc refs ... [ Upstream commit f718b093277df582fbf8775548a4f163e664d282 ] Commit 478de3380c ("block, bfq: deschedule empty bfq_queues not referred by any process") fixed commit 3726112ec7 ("block, bfq: re-schedule empty queues if they deserve I/O plugging") by descheduling an empty bfq_queue when it remains with not process reference. Yet, this still left a case uncovered: an empty bfq_queue with not process reference that remains in service. This happens for an in-service sync bfq_queue that is deemed to deserve I/O-dispatch plugging when it remains empty. Yet no new requests will arrive for such a bfq_queue if no process sends requests to it any longer. Even worse, the bfq_queue may happen to be prematurely freed while still in service (because there may remain no reference to it any longer). This commit solves this problem by preventing I/O dispatch from being plugged for the in-service bfq_queue, if the latter has no process reference (the bfq_queue is then prevented from remaining in service). Fixes: 3726112ec7 ("block, bfq: re-schedule empty queues if they deserve I/O plugging") Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name> Reported-by: Patrick Dung <patdung100@gmail.com> Tested-by: Patrick Dung <patdung100@gmail.com> Signed-off-by: Paolo Valente <paolo.valente@linaro.org> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-02-24 08:36:31 +01:00
..
partitions	docs: admin-guide: add a series of orphaned documents	2019-07-15 11:03:02 -03:00
badblocks.c
bfq-cgroup.c	bfq: Add per-device weight	2019-09-06 14:33:52 -06:00
bfq-iosched.c	block, bfq: do not plug I/O for bfq_queues with no proc refs	2020-02-24 08:36:31 +01:00
bfq-iosched.h	bfq: Add per-device weight	2019-09-06 14:33:52 -06:00
bfq-wf2q.c	bfq: Fix the missing barrier in __bfq_entity_update_weight_prio	2019-09-06 14:33:48 -06:00
bio-integrity.c	block: fix memleak of bio integrity data	2020-01-26 10:01:09 +01:00
bio.c	block: fix memleak of bio integrity data	2020-01-26 10:01:09 +01:00
blk-cgroup.c	blkcg: make blkcg_print_stat() print stats only for online blkgs	2019-11-06 17:08:38 -07:00
blk-core.c	block: end bio with BLK_STS_AGAIN in case of non-mq devs and REQ_NOWAIT	2020-01-12 12:21:37 +01:00
blk-exec.c
blk-flush.c	block: Fix a lockdep complaint triggered by request queue flushing	2020-01-12 12:21:42 +01:00
blk-integrity.c	block: centralize PI remapping logic to the block layer	2019-09-17 20:03:49 -06:00
blk-ioc.c
blk-iocost.c	iocost: over-budget forced IOs should schedule async delay	2019-12-31 16:46:19 +01:00
blk-iolatency.c	blkcg: s/RQ_QOS_CGROUP/RQ_QOS_LATENCY/	2019-08-28 21:17:08 -06:00
blk-lib.c
blk-map.c	block: fix memleak when __blk_rq_map_user_iov() is failed	2020-01-12 12:21:43 +01:00
blk-merge.c	block: Improve physical block alignment of split bios	2019-08-04 21:41:29 -06:00
blk-mq-cpumap.c	blk-mq: balance mapping between present CPUs and queues	2019-08-04 21:43:12 -06:00
blk-mq-debugfs-zoned.c
blk-mq-debugfs.c
blk-mq-debugfs.h
blk-mq-pci.c
blk-mq-rdma.c
blk-mq-sched.c	blk-mq: move lockdep_assert_held() into elevator_exit	2019-09-26 00:45:05 -06:00
blk-mq-sched.h	block: blk-mq: Remove blk_mq_sched_started_request and started_request	2019-07-23 07:25:09 -06:00
blk-mq-sysfs.c	blk-mq: make sure that line break can be printed	2019-12-17 19:56:53 +01:00
blk-mq-tag.c	blk-mq: introduce blk_mq_tagset_wait_completed_request()	2019-08-04 21:41:29 -06:00
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c	blk-mq: apply normal plugging for HDD	2019-09-27 11:40:21 -06:00
blk-mq.h	block: Disable write plugging for zoned block devices	2019-07-10 14:18:01 -06:00
blk-pm.c	block: bypass blk_set_runtime_active for uninitialized q->dev	2019-09-12 07:11:56 -06:00
blk-pm.h
blk-rq-qos.c	blk-wbt: fix performance regression in wbt scale_up/scale_down	2019-10-06 09:26:41 -06:00
blk-rq-qos.h	blk-rq-qos: fix first node deletion of rq_qos_del()	2019-10-15 10:13:13 -06:00
blk-settings.c	block: fix an integer overflow in logical block size	2020-01-23 08:22:32 +01:00
blk-softirq.c
blk-stat.c
blk-stat.h
blk-sysfs.c	rq-qos: get rid of redundant wbt_update_limits()	2019-09-27 01:13:10 -06:00
blk-throttle.c	block: make rq sector size accessible for block stats	2019-09-15 16:02:08 -06:00
blk-timeout.c
blk-wbt.c	blk-wbt: fix performance regression in wbt scale_up/scale_down	2019-10-06 09:26:41 -06:00
blk-wbt.h	block/rq_qos: implement rq_qos_ops->queue_depth_changed()	2019-08-28 21:17:07 -06:00
blk-zoned.c	blk-zoned: implement REQ_OP_ZONE_RESET_ALL	2019-08-04 21:41:29 -06:00
blk.h	block: fix memleak of bio integrity data	2020-01-26 10:01:09 +01:00
bounce.c
bsg-lib.c	block: Fix the type of 'sts' in bsg_queue_rq()	2020-01-23 08:22:44 +01:00
bsg.c
cmdline-parser.c
compat_ioctl.c	compat_ioctl: block: handle BLKGETZONESZ/BLKGETNRZONES	2020-01-09 10:19:58 +01:00
elevator.c	block: Fix elv_support_iosched()	2019-10-14 13:54:09 -06:00
genhd.c	block: Delay default elevator initialization	2019-09-05 19:52:34 -06:00
ioctl.c
ioprio.c	docs: block: convert to ReST	2019-07-15 09:20:27 -03:00
Kconfig	blkcg: implement blk-iocost	2019-08-28 21:17:12 -06:00
Kconfig.iosched	docs: block: convert to ReST	2019-07-15 09:20:27 -03:00
kyber-iosched.c
Makefile	blkcg: implement blk-iocost	2019-08-28 21:17:12 -06:00
mq-deadline.c	block: Introduce elevator features	2019-09-05 19:52:33 -06:00
opal_proto.h	block: sed-opal: Removed duplicate OPAL_METHOD_LENGTH definition	2019-08-20 09:34:49 -06:00
partition-generic.c
scsi_ioctl.c
sed-opal.c	block: sed-opal: fix sparse warning: convert __be64 data	2019-10-03 14:21:32 -06:00
t10-pi.c	block: t10-pi: fix -Wswitch warning	2019-09-23 08:05:19 -06:00