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71217df39d
linux/block
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Paolo Valente 71217df39d block, bfq: make waker-queue detection more robust 
In the presence of many parallel I/O flows, the detection of waker
bfq_queues suffers from false positives. This commits addresses this
issue by making the filtering of actual wakers more selective. In more
detail, a candidate waker must be found to meet waker requirements
three times before being promoted to actual waker.

Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-01-25 14:18:37 -07:00
..
partitions block: use an xarray for disk->part_tbl 2021-01-24 18:17:20 -07:00
badblocks.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
bfq-cgroup.c bfq: fix blkio cgroup leakage v4 2020-08-18 07:48:08 -07:00
bfq-iosched.c block, bfq: make waker-queue detection more robust 2021-01-25 14:18:37 -07:00
bfq-iosched.h block, bfq: make waker-queue detection more robust 2021-01-25 14:18:37 -07:00
bfq-wf2q.c bfq: don't duplicate code for different paths 2021-01-24 18:20:47 -07:00
bio-integrity.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
bio.c bio: don't copy bvec for direct IO 2021-01-25 08:58:24 -07:00
blk-cgroup-rwstat.c blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT 2019-11-07 12:28:13 -07:00
blk-cgroup-rwstat.h blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT 2019-11-07 12:28:13 -07:00
blk-cgroup.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
blk-core.c block: skip bio_check_eod for partition-remapped bios 2021-01-25 11:41:34 -07:00
blk-crypto-fallback.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
blk-crypto-internal.h block: make blk_crypto_rq_bio_prep() able to fail 2020-10-05 10:47:43 -06:00
blk-crypto.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
blk-exec.c block: remove unnecessary argument from blk_execute_rq 2021-01-24 21:52:39 -07:00
blk-flush.c for-5.11/block-2020-12-14 2020-12-16 12:57:51 -08:00
blk-integrity.c block: remove the unused blk_integrity_merge_bio export 2020-10-06 07:29:53 -06:00
blk-ioc.c block: remove retry loop in ioc_release_fn() 2020-07-16 10:22:15 -06:00
blk-iocost.c blk-iocost: fix NULL iocg deref from racing against initialization 2021-01-05 11:33:32 -07:00
blk-iolatency.c block: Remove redundant 'return' statement 2020-10-08 07:59:48 -06:00
blk-lib.c block: move the start_sect field to struct block_device 2020-12-01 14:53:40 -07:00
blk-map.c block: fix bmd->is_null_mapped initialization 2020-09-23 09:18:39 -06:00
blk-merge.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
blk-mq-cpumap.c blk-mq: remove the calling of local_memory_node() 2020-10-20 07:08:17 -06:00
blk-mq-debugfs-zoned.c block: Cleanup license notice 2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c block-5.11-2021-01-10 2021-01-10 12:53:08 -08:00
blk-mq-debugfs.h blk-mq: no need to check return value of debugfs_create functions 2019-06-13 03:00:30 -06:00
blk-mq-pci.c block: Fix blk_mq_*_map_queues() kernel-doc headers 2019-05-31 15:12:34 -06:00
blk-mq-rdma.c block: Fix blk_mq_*_map_queues() kernel-doc headers 2019-05-31 15:12:34 -06:00
blk-mq-sched.c block: remove the request_queue to argument request based tracepoints 2020-12-04 09:42:00 -07:00
blk-mq-sched.h block-5.10-2020-10-12 2020-10-13 12:12:44 -07:00
blk-mq-sysfs.c blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue 2020-10-09 12:46:28 -06:00
blk-mq-tag.c block-mq: fix comments in blk_mq_queue_tag_busy_iter 2020-09-29 08:11:00 -06:00
blk-mq-tag.h blk-mq: Relocate hctx_may_queue() 2020-09-03 15:20:47 -06:00
blk-mq-virtio.c blk-mq: Fix typo in comment 2020-03-17 20:55:21 +01:00
blk-mq.c blk-mq: Improve performance of non-mq IO schedulers with multiple HW queues 2021-01-24 18:19:46 -07:00
blk-mq.h blk-mq: update arg in comment of blk_mq_map_queue 2020-12-12 11:13:41 -07:00
blk-pm.c scsi: block: Fix a race in the runtime power management code 2020-12-09 11:41:41 -05:00
blk-pm.h scsi: block: Do not accept any requests while suspended 2020-12-09 11:41:42 -05:00
blk-rq-qos.c Revert "blk-rq-qos: remove redundant finish_wait to rq_qos_wait." 2020-07-15 09:33:37 -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: use an xarray for disk->part_tbl 2021-01-24 18:17:20 -07:00
blk-stat.c blk-stat: make q->stats->lock irqsafe 2020-09-01 16:48:46 -06:00
blk-stat.h block: deactivate blk_stat timer in wbt_disable_default() 2018-12-12 06:47:51 -07:00
blk-sysfs.c blk-mq: move cancel of hctx->run_work to the front of blk_exit_queue 2020-10-09 12:46:28 -06:00
blk-throttle.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
blk-timeout.c block: blk-timeout: delete duplicated word 2020-07-31 16:29:47 -06:00
blk-wbt.c block: wbt: Remove unnecessary invoking of wbt_update_limits in wbt_init 2020-11-30 15:01:18 -07:00
blk-wbt.h blk-wbt: remove wbt_update_limits 2020-05-29 16:30:39 -06:00
blk-zoned.c block: Improve blk_revalidate_disk_zones() checks 2020-12-07 17:34:21 -07:00
blk.h block: move three bvec helpers declaration into private helper 2021-01-24 21:24:06 -07:00
bounce.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
bsg-lib.c block: drop double zeroing 2020-09-23 09:18:13 -06:00
bsg.c block: remove unnecessary argument from blk_execute_rq 2021-01-24 21:52:39 -07:00
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
elevator.c block: fix comment and add lockdep assert 2020-10-09 12:34:06 -06:00
genhd.c block: use an xarray for disk->part_tbl 2021-01-24 18:17:20 -07:00
ioctl.c block: move the policy field to struct block_device 2020-12-01 14:53:40 -07:00
ioprio.c block: grant IOPRIO_CLASS_RT to CAP_SYS_NICE 2020-09-01 19:38:33 -06:00
Kconfig blk-wbt: Remove obsolete multiqueue I/O scheduling comment 2020-09-01 16:49:26 -06:00
Kconfig.iosched treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
keyslot-manager.c block/keyslot-manager: prevent crash when num_slots=1 2020-11-20 11:52:52 -07:00
kyber-iosched.c blk-mq: Improve performance of non-mq IO schedulers with multiple HW queues 2021-01-24 18:19:46 -07:00
Makefile blk-mq: merge blk-softirq.c into blk-mq.c 2020-06-24 09:15:56 -06:00
mq-deadline.c Revert "blk-mq, elevator: Count requests per hctx to improve performance" 2021-01-24 18:19:46 -07:00
opal_proto.h block: sed-opal: Change the check condition for regular session validity 2020-03-12 08:00:10 -06:00
scsi_ioctl.c block: remove unnecessary argument from blk_execute_rq 2021-01-24 21:52:39 -07:00
sed-opal.c block: sed-opal: Change the check condition for regular session validity 2020-03-12 08:00:10 -06:00
t10-pi.c block: Allow t10-pi to be modular 2020-01-06 20:59:04 -07:00