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85686d0dc1
linux/block
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Paolo Valente 85686d0dc1 block, bfq: keep shared queues out of the waker mechanism 
Shared queues are likely to receive I/O at a high rate. This may
deceptively let them be considered as wakers of other queues. But a
false waker will unjustly steal bandwidth to its supposedly woken
queue. So considering also shared queues in the waking mechanism may
cause more control troubles than throughput benefits. This commit
keeps shared queues out of the waker-detection mechanism.

Tested-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Link: https://lore.kernel.org/r/20210304174627.161-6-paolo.valente@linaro.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-03-25 10:50:07 -06:00
..
partitions block: revert "block: fix bd_size_lock use" 2021-02-28 20:12:02 -07:00
badblocks.c
bfq-cgroup.c
bfq-iosched.c block, bfq: keep shared queues out of the waker mechanism 2021-03-25 10:50:07 -06:00
bfq-iosched.h block, bfq: make waker-queue detection more robust 2021-01-25 14:18:37 -07:00
bfq-wf2q.c block, bfq: always inject I/O of queues blocked by wakers 2021-03-25 10:50:07 -06:00
bio-integrity.c block: use bi_max_vecs to find the bvec pool 2021-02-08 08:33:16 -07:00
bio.c block: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -07:00
blk-cgroup-rwstat.c blk-cgroup: Fix the recursive blkg rwstat 2021-03-05 11:32:15 -07:00
blk-cgroup-rwstat.h
blk-cgroup.c for-5.12/block-2021-02-17 2021-02-21 11:02:48 -08:00
blk-core.c block: get rid of the trace rq insert wrapper 2021-02-22 06:37:41 -07:00
blk-crypto-fallback.c block: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -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 dm: support key eviction from keyslot managers of underlying devices 2021-02-11 09:45:25 -05:00
blk-exec.c block: drop removed argument from kernel-doc of blk_execute_rq() 2021-01-29 07:43:29 -07:00
blk-flush.c block: use an on-stack bio in blkdev_issue_flush 2021-01-27 09:51:48 -07:00
blk-integrity.c block: remove the unused blk_integrity_merge_bio export 2020-10-06 07:29:53 -06:00
blk-ioc.c
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: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -07:00
blk-map.c block: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -07:00
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
blk-mq-debugfs.c block: Drop leftover references to RQF_SORTED 2021-03-01 10:15:07 -07:00
blk-mq-debugfs.h
blk-mq-pci.c
blk-mq-rdma.c
blk-mq-sched.c block: Drop leftover references to RQF_SORTED 2021-03-01 10:15:07 -07:00
blk-mq-sched.h block: get rid of the trace rq insert wrapper 2021-02-22 06:37:41 -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 blk-mq: Sentence reconstruct for better readability 2021-03-25 10:50:01 -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.c for-5.12/block-ipi-2021-02-21 2021-02-22 10:53:05 -08:00
blk-mq.h blk-mq: test QUEUE_FLAG_HCTX_ACTIVE for sbitmap_shared in hctx_may_queue 2021-01-24 21:25:17 -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 block: Remove unused blk_pm_*() function definitions 2021-02-22 06:33:48 -07:00
blk-rq-qos.c
blk-rq-qos.h
blk-settings.c blk-settings: align max_sectors on "logical_block_size" boundary 2021-02-23 19:25:36 -07:00
blk-stat.c
blk-stat.h
blk-sysfs.c block: fix potential IO hang when turning off io_poll 2021-02-22 06:40:02 -07:00
blk-throttle.c block: store a block_device pointer in struct bio 2021-01-24 18:17:20 -07:00
blk-timeout.c
blk-wbt.c blk: wbt: remove unused parameter from wbt_should_throttle 2021-01-26 13:13:00 -07:00
blk-wbt.h
blk-zoned.c block: Discard page cache of zone reset target range 2021-03-11 11:49:25 -07:00
blk.h block: introduce blk_queue_clear_zone_settings() 2021-02-10 07:44:41 -07:00
bounce.c block: rename BIO_MAX_PAGES to BIO_MAX_VECS 2021-03-11 07:47:48 -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
elevator.c block: fix comment and add lockdep assert 2020-10-09 12:34:06 -06:00
genhd.c block: Suppress uevent for hidden device when removed 2021-03-11 11:48:25 -07:00
ioctl.c block: reopen the device in blkdev_reread_part 2021-02-23 19:23:22 -07:00
ioprio.c
Kconfig
Kconfig.iosched
keyslot-manager.c - Fix DM integrity's HMAC support to provide enhanced security of 2021-02-22 10:22:54 -08:00
kyber-iosched.c kyber: introduce kyber_depth_updated() 2021-02-22 12:37:57 -07:00
Makefile
mq-deadline.c block: get rid of the trace rq insert wrapper 2021-02-22 06:37:41 -07:00
opal_proto.h
scsi_ioctl.c block: remove unnecessary argument from blk_execute_rq 2021-01-24 21:52:39 -07:00
sed-opal.c
t10-pi.c