Paolo Valente 02a6d787f4 block, bfq: do not overcharge writes in asymmetric scenarios ... Writes tend to starve reads. bfq counters this problem by overcharging writes with an inflated service w.r.t. the actual service (number of sector written) they receive. Yet his overcharging is useless, and actually causes unfairness in the opposite direction, when bfq happens to be enforcing strong I/O control. bfq does this enforcing when the scenario is asymmetric, i.e., when some bfq_queue or group of bfq_queues is to be granted a different bandwidth than some other bfq_queue or group of bfq_queues. So, in such a scenario, this commit disables write overcharging. Signed-off-by: Paolo Valente <paolo.valente@linaro.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2019-01-31 12:50:24 -07:00
..
partitions	partitions/aix: append null character to print data from disk	2018-07-27 09:17:41 -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	blkcg: fix ref count issue with bio_blkcg() using task_css	2018-12-07 22:26:36 -07:00
bfq-iosched.c	block, bfq: do not overcharge writes in asymmetric scenarios	2019-01-31 12:50:24 -07:00
bfq-iosched.h	block, bfq: consider also ioprio classes in symmetry detection	2019-01-31 12:50:23 -07:00
bfq-wf2q.c	block, bfq: fix queue removal from weights tree	2019-01-31 12:50:24 -07:00
bio-integrity.c	block: remove the bio_integrity_advance export	2018-12-16 08:33:57 -07:00
bio.c	for-4.21/block-20190102	2019-01-02 18:49:58 -08:00
blk-cgroup.c	blkcg: remove unused __blkg_release_rcu()	2018-12-21 08:47:58 -07:00
blk-core.c	Revert "block: cover another queue enter recursion via BIO_QUEUE_ENTERED"	2019-01-27 06:35:28 -07:00
blk-exec.c	block: remove dead elevator code	2018-11-07 13:42:32 -07:00
blk-flush.c	block: add queue_is_mq() helper	2018-11-16 08:34:06 -07:00
blk-integrity.c	block: merge BIOVEC_SEG_BOUNDARY into biovec_phys_mergeable	2018-09-24 12:33:57 -06:00
blk-ioc.c	block: remove the queue_lock indirection	2018-11-15 12:17:28 -07:00
blk-iolatency.c	block: fix blk-iolatency accounting underflow	2018-12-17 11:19:54 -07:00
blk-lib.c	block: fix 32 bit overflow in __blkdev_issue_discard()	2018-11-14 08:17:18 -07:00
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	Revert "block: cover another queue enter recursion via BIO_QUEUE_ENTERED"	2019-01-27 06:35:28 -07:00
blk-mq-cpumap.c	blk-mq: initial support for multiple queue maps	2018-11-07 13:45:00 -07:00
blk-mq-debugfs-zoned.c	block: Cleanup license notice	2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c	blk-mq: fix the cmd_flag_name array	2019-01-24 08:41:42 -07:00
blk-mq-debugfs.h	blk-mq-debugfs: support rq_qos	2018-12-16 19:53:47 -07:00
blk-mq-pci.c	blk-mq: initial support for multiple queue maps	2018-11-07 13:45:00 -07:00
blk-mq-rdma.c	blk-mq-rdma: pass in queue map to blk_mq_rdma_map_queues	2018-12-13 09:59:08 +01:00
blk-mq-sched.c	blk-mq: fix dispatch from sw queue	2018-12-17 11:19:54 -07:00
blk-mq-sched.h	block: mq-deadline: Fix write completion handling	2018-12-17 11:19:39 -07:00
blk-mq-sysfs.c	blk-mq: export hctx->type in debugfs instead of sysfs	2018-12-17 05:44:45 -07:00
blk-mq-tag.c	sbitmap: optimize wakeup check	2018-11-30 14:48:04 -07:00
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: initial support for multiple queue maps	2018-11-07 13:45:00 -07:00
blk-mq.c	block: don't lose track of REQ_INTEGRITY flag	2019-01-16 07:28:10 -07:00
blk-mq.h	blk-mq: fix dispatch from sw queue	2018-12-17 11:19:54 -07:00
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	blk-mq-debugfs: support rq_qos	2018-12-16 19:53:47 -07:00
blk-rq-qos.h	block: fix blk-iolatency accounting underflow	2018-12-17 11:19:54 -07:00
blk-settings.c	SCSI misc on 20181224	2018-12-28 14:48:06 -08:00
blk-softirq.c	block: remove a few unused exports	2018-11-15 12:13:25 -07:00
blk-stat.c	block: remove a few unused exports	2018-11-15 12:13:25 -07:00
blk-stat.h	block: deactivate blk_stat timer in wbt_disable_default()	2018-12-12 06:47:51 -07:00
blk-sysfs.c	SCSI misc on 20181224	2018-12-28 14:48:06 -08:00
blk-throttle.c	blkcg: consolidate bio_issue_init() to be a part of core	2018-12-07 22:26:37 -07:00
blk-timeout.c	block: don't hold the queue_lock over blk_abort_request	2018-11-15 12:13:18 -07:00
blk-wbt.c	blk-wbt: Declare local functions static	2019-01-24 11:09:21 -07:00
blk-wbt.h	block: remove external dependency on wbt_flags	2018-07-09 09:07:54 -06:00
blk-zoned.c	for-4.21/block-20181221	2018-12-28 13:19:59 -08:00
blk.h	block: sum requests in the plug structure	2018-11-26 10:35:22 -07:00
bounce.c	blkcg: remove bio->bi_css and instead use bio->bi_blkg	2018-12-07 22:26:37 -07:00
bsg-lib.c	bsg: move bsg-lib parts outside of request queue	2018-11-07 13:42:33 -07:00
bsg.c	bsg: deprecate BIDI support in bsg	2018-12-21 08:47:58 -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
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: add queue_is_mq() helper	2018-11-16 08:34:06 -07:00
genhd.c	block: return just one value from part_in_flight	2018-12-10 08:30:38 -07:00
ioctl.c	block: Introduce BLKGETNRZONES ioctl	2018-10-25 11:17:40 -06:00
ioprio.c	block: add ioprio_check_cap function	2018-05-31 10:50:54 -04:00
Kconfig	Kconfig updates for v4.21	2018-12-29 13:03:29 -08:00
Kconfig.iosched	block: remove legacy IO schedulers	2018-11-07 13:42:32 -07:00
kyber-iosched.c	kyber: use sbitmap add_wait_queue/list_del wait helpers	2018-12-20 12:17:21 -07:00
Makefile	block: remove legacy IO schedulers	2018-11-07 13:42:32 -07:00
mq-deadline.c	block: mq-deadline: Fix write completion handling	2018-12-17 11:19:39 -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: return just one value from part_in_flight	2018-12-10 08:30:38 -07:00
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