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Fam Zheng 795fe54c2a bfq: Add per-device weight 
This adds to BFQ the missing per-device weight interfaces:
blkio.bfq.weight_device on legacy and io.bfq.weight on unified. The
implementation pretty closely resembles what we had in CFQ and the parsing code
is basically reused.

Tests
=====

Using two cgroups and three block devices, having weights setup as:

Cgroup          test1           test2
============================================
default         100             500
sda             500             100
sdb             default         default
sdc             200             200

cgroup v1 runs
--------------

    sda.test1.out:   READ: bw=913MiB/s
    sda.test2.out:   READ: bw=183MiB/s

    sdb.test1.out:   READ: bw=213MiB/s
    sdb.test2.out:   READ: bw=1054MiB/s

    sdc.test1.out:   READ: bw=650MiB/s
    sdc.test2.out:   READ: bw=650MiB/s

cgroup v2 runs
--------------

    sda.test1.out:   READ: bw=915MiB/s
    sda.test2.out:   READ: bw=184MiB/s

    sdb.test1.out:   READ: bw=216MiB/s
    sdb.test2.out:   READ: bw=1069MiB/s

    sdc.test1.out:   READ: bw=621MiB/s
    sdc.test2.out:   READ: bw=622MiB/s

Signed-off-by: Fam Zheng <zhengfeiran@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Paolo Valente <paolo.valente@linaro.org>

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-09-06 14:33:52 -06:00
..
partitions
docs: admin-guide: add a series of orphaned documents
2019-07-15 11:03:02 -03:00
badblocks.c
block: switch all files cleared marked as GPLv2 to SPDX tags
2019-04-30 16:11:57 -06:00
bfq-cgroup.c
bfq: Add per-device weight
2019-09-06 14:33:52 -06:00
bfq-iosched.c
for-linus-20190726
2019-07-26 10:32:12 -07:00
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/bio-integrity: fix a memory leak bug
2019-07-11 20:01:21 -06:00
bio.c
block: move same page handling from __bio_add_pc_page to the callers
2019-08-22 07:14:39 -06:00
blk-cgroup.c
blkcg: separate blkcg_conf_get_disk() out of blkg_conf_prep()
2019-08-28 21:17:04 -06:00
blk-core.c
block/rq_qos: add rq_qos_merge()
2019-08-28 21:17:05 -06:00
blk-exec.c
block: add SPDX tags to block layer files missing licensing information
2019-04-30 16:12:03 -06:00
blk-flush.c
block: switch all files cleared marked as GPLv2 to SPDX tags
2019-04-30 16:11:57 -06:00
blk-integrity.c
docs: block: convert to ReST
2019-07-15 09:20:27 -03:00
blk-ioc.c
block: remove the queue_lock indirection
2018-11-15 12:17:28 -07:00
blk-iocost.c
blkcg: add missing NULL check in ioc_cpd_alloc()
2019-08-30 07:16:19 -06:00
blk-iolatency.c
blkcg: s/RQ_QOS_CGROUP/RQ_QOS_LATENCY/
2019-08-28 21:17:08 -06:00
blk-lib.c
block: fix 32 bit overflow in __blkdev_issue_discard()
2018-11-14 08:17:18 -07:00
blk-map.c
block: remove the bi_phys_segments field in struct bio
2019-06-20 10:29:22 -06:00
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
block: Cleanup license notice
2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c
for-5.3/block-20190708
2019-07-09 10:45:06 -07:00
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
blk-mq: remove blk_mq_put_ctx()
2019-07-02 21:03:27 -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
block: split .sysfs_lock into two locks
2019-08-27 10:40:20 -06:00
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
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
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq.c
block: Delay default elevator initialization
2019-09-05 19:52:34 -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: remove the queue_lock indirection
2018-11-15 12:17:28 -07:00
blk-pm.h
block: remove the queue_lock indirection
2018-11-15 12:17:28 -07:00
blk-rq-qos.c
block/rq_qos: implement rq_qos_ops->queue_depth_changed()
2019-08-28 21:17:07 -06:00
blk-rq-qos.h
blkcg: implement blk-iocost
2019-08-28 21:17:12 -06:00
blk-settings.c
block: Introduce elevator features
2019-09-05 19:52:33 -06:00
blk-softirq.c
block: remove a few unused exports
2018-11-15 12:13:25 -07:00
blk-stat.c
block: add SPDX tags to block layer files missing licensing information
2019-04-30 16:12:03 -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
block: split .sysfs_lock into two locks
2019-08-27 10:40:20 -06:00
blk-throttle.c
blkcg: pass @q and @blkcg into blkcg_pol_alloc_pd_fn()
2019-08-28 21:17:01 -06:00
blk-timeout.c
block: add SPDX tags to block layer files missing licensing information
2019-04-30 16:12:03 -06:00
blk-wbt.c
block/rq_qos: implement rq_qos_ops->queue_depth_changed()
2019-08-28 21:17:07 -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: Change elevator_init_mq() to always succeed
2019-09-05 19:52:33 -06:00
bounce.c
block: remove the i argument to bio_for_each_segment_all
2019-04-30 09:26:13 -06:00
bsg-lib.c
block: Fix bsg_setup_queue() kernel-doc header
2019-05-31 15:12:34 -06:00
bsg.c
block: switch all files cleared marked as GPLv2 to SPDX tags
2019-04-30 16:11:57 -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
elevator.c
block: fix elevator_get_by_features()
2019-09-06 07:02:31 -06:00
genhd.c
block: Delay default elevator initialization
2019-09-05 19:52:34 -06:00
ioctl.c
block: add SPDX tags to block layer files missing licensing information
2019-04-30 16:12:03 -06:00
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
blk-mq: remove blk_mq_put_ctx()
2019-07-02 21:03:27 -06:00
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
block: fix use-after-free on gendisk
2019-04-22 09:48:12 -06:00
scsi_ioctl.c
block: switch all files cleared marked as GPLv2 to SPDX tags
2019-04-30 16:11:57 -06:00
sed-opal.c
block: sed-opal: Remove always false conditional statement
2019-08-20 09:33:21 -06:00
t10-pi.c
block: switch all files cleared marked as GPLv2 to SPDX tags
2019-04-30 16:11:57 -06:00