Jianchao Wang d263ed9926 blk-mq: count the hctx as active before allocating tag ... Currently, we count the hctx as active after allocate driver tag successfully. If a previously inactive hctx try to get tag first time, it may fails and need to wait. However, due to the stale tag ->active_queues, the other shared-tags users are still able to occupy all driver tags while there is someone waiting for tag. Consequently, even if the previously inactive hctx is waked up, it still may not be able to get a tag and could be starved. To fix it, we count the hctx as active before try to allocate driver tag, then when it is waiting the tag, the other shared-tag users will reserve budget for it. Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jianchao Wang <jianchao.w.wang@oracle.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2018-08-09 08:34:17 -06:00
..
partitions	partitions/aix: append null character to print data from disk	2018-07-27 09:17:41 -06:00
Kconfig	block: introduce blk-iolatency io controller	2018-07-09 09:07:54 -06:00
Kconfig.iosched	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
Makefile	block: introduce blk-iolatency io controller	2018-07-09 09:07:54 -06:00
badblocks.c	badblocks: fix wrong return value in badblocks_set if badblocks are disabled	2017-11-03 11:29:50 -07:00
bfq-cgroup.c	block: use ktime_get_ns() instead of sched_clock() for cfq and bfq	2018-05-09 08:33:06 -06:00
bfq-iosched.c	block, bfq: give a better name to bfq_bfqq_may_idle	2018-07-09 09:07:52 -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: fix service being wrongly set to zero in case of preemption	2018-07-09 09:07:52 -06:00
bio-integrity.c	block: move bio_integrity_{intervals,bytes} into blkdev.h	2018-07-26 15:49:41 -06:00
bio.c	block: bvec_nr_vecs() returns value for wrong slab	2018-08-09 08:25:04 -06:00
blk-cgroup.c	blk-cgroup: hold the queue ref during throttling	2018-08-01 09:16:03 -06:00
blk-core.c	block: really disable runtime-pm for blk-mq	2018-08-02 10:36:02 -06:00
blk-exec.c	blk-mq-sched: remove unused 'can_block' arg from blk_mq_sched_insert_request	2018-01-17 09:49:21 -07:00
blk-flush.c	block: fix use-after-free in block flush handling	2018-06-09 06:37:14 -06:00
blk-integrity.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
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	Merge branch 'for-4.16/block' of git://git.kernel.dk/linux-block	2018-01-29 11:51:49 -08:00
blk-merge.c	block: don't use blocking queue entered for recursive bio submits	2018-06-02 20:35:00 -06:00
blk-mq-cpumap.c	blk-mq: don't keep offline CPUs mapped to hctx 0	2018-04-10 08:38:46 -06:00
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	block: Add rdma affinity based queue mapping helper	2017-08-08 14:58:03 -04:00
blk-mq-sched.c	blk-mq: issue directly if hw queue isn't busy in case of 'none'	2018-07-17 16:04:00 -06:00
blk-mq-sched.h	block: move sysfs_lock into elevator_init	2018-06-01 07:38:19 -06:00
blk-mq-sysfs.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
blk-mq-tag.c	blk-mq: count the hctx as active before allocating tag	2018-08-09 08:34:17 -06:00
blk-mq-tag.h	Merge branch 'for-4.15/block' of git://git.kernel.dk/linux-block	2017-11-14 15:32:19 -08:00
blk-mq-virtio.c	blk-mq: provide a default queue mapping for virtio device	2017-02-27 20:54:05 +02:00
blk-mq.c	blk-mq: count the hctx as active before allocating tag	2018-08-09 08:34:17 -06:00
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-rq-qos: refactor out common elements of blk-wbt	2018-07-09 09:07:54 -06:00
blk-tag.c	for-linus-20180616	2018-06-17 05:37:55 +09:00
blk-throttle.c	block: add bi_blkg to the bio for cgroups	2018-07-09 09:07:53 -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: Avoid lock contention and thundering herd issue in wbt_wait	2018-08-07 14:40:49 -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	block: introduce blk-iolatency io controller	2018-07-09 09:07:54 -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	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compat_ioctl.c	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
deadline-iosched.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
elevator.c	block: split the blk-mq case from elevator_init	2018-06-01 07:38:21 -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	block: pass inclusive 'lend' parameter to truncate_inode_pages_range	2018-02-23 15:20:19 -07:00
ioprio.c	block: add ioprio_check_cap function	2018-05-31 10:50:54 -04:00
kyber-iosched.c	block: kyber: make kyber more friendly with merging	2018-05-30 10:47:40 -06:00
mq-deadline.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
noop-iosched.c	block: move existing elevator ops to union	2017-01-17 10:03:33 -07:00
opal_proto.h	block: sed-opal: Set MBRDone on S3 resume path if TPER is MBREnabled	2017-09-11 09:45:52 -06:00
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	block: consistently use GFP_NOIO instead of __GFP_NORECLAIM	2018-05-14 08:55:18 -06:00
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