Shaohua Li 53696b8d21 blk-throttle: add latency target support ... One hard problem adding .low limit is to detect idle cgroup. If one cgroup doesn't dispatch enough IO against its low limit, we must have a mechanism to determine if other cgroups dispatch more IO. We added the think time detection mechanism before, but it doesn't work for all workloads. Here we add a latency based approach. We already have mechanism to calculate latency threshold for each IO size. For every IO dispatched from a cgorup, we compare its latency against its threshold and record the info. If most IO latency is below threshold (in the code I use 75%), the cgroup could be treated idle and other cgroups can dispatch more IO. Currently this latency target check is only for SSD as we can't calcualte the latency target for hard disk. And this is only for cgroup leaf node so far. Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>		2017-03-28 08:02:20 -06:00
..
partitions	partitions/efi: Fix integer overflow in GPT size calculation	2017-01-17 09:02:31 -07:00
Kconfig	blk-throttle: add configure option for new .low interface	2017-03-28 08:02:20 -06:00
Kconfig.iosched	block: get rid of blk-mq default scheduler choice Kconfig entries	2017-02-22 13:19:45 -07:00
Makefile	virtio, vhost: optimizations, fixes	2017-03-02 13:53:13 -08:00
badblocks.c	badblocks: badblocks_set/clear update unacked_exist	2016-10-21 15:45:47 -06:00
bio-integrity.c	block: remove bio_is_rw	2016-10-28 08:45:17 -06:00
bio.c	blk-throttle: add a simple idle detection	2017-03-28 08:02:20 -06:00
blk-cgroup.c	sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>	2017-03-02 08:42:32 +01:00
blk-core.c	block: track request size in blk_issue_stat	2017-03-28 08:02:20 -06:00
blk-exec.c	block: introduce blk_rq_is_passthrough	2017-01-31 14:00:34 -07:00
blk-flush.c	block: remove outdated part of blkdev_issue_flush() comment	2017-03-24 15:41:30 -06:00
blk-integrity.c	block: constify struct blk_integrity_profile	2017-03-24 20:34:39 -06:00
blk-ioc.c	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2017-03-03 10:53:35 -08:00
blk-lib.c	block: correct documentation for blkdev_issue_discard() flags	2017-03-24 15:41:28 -06:00
blk-map.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>	2017-03-02 08:42:36 +01:00
blk-merge.c	block: optionally merge discontiguous discard bios into a single request	2017-02-08 13:43:08 -07:00
blk-mq-cpumap.c	blk-mq: export blk_mq_map_queues	2016-11-08 17:30:00 -05:00
blk-mq-debugfs.c	blk-stat: convert to callback-based statistics reporting	2017-03-21 10:03:11 -06:00
blk-mq-pci.c	blk_mq: linux/blk-mq.h does not include all the headers it depends on	2016-09-19 08:21:51 -06:00
blk-mq-sched.c	blk-mq: move update of tags->rqs to __blk_mq_alloc_request()	2017-03-02 08:56:04 -07:00
blk-mq-sched.h	blk-mq-sched: separate mark hctx and queue restart operations	2017-02-23 11:55:47 -07:00
blk-mq-sysfs.c	blk-mq: free hctx->cpumask in release handler of hctx's kobject	2017-03-08 09:56:12 -07:00
blk-mq-tag.c	blk-mq: Fix tagset reinit in the presence of cpu hot-unplug	2017-03-13 08:14:23 -06:00
blk-mq-tag.h	blk-mq-sched: Allocate sched reserved tags as specified in the original queue tagset	2017-03-02 08:56:04 -07:00
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	block: track request size in blk_issue_stat	2017-03-28 08:02:20 -06:00
blk-mq.h	blk-stat: convert to callback-based statistics reporting	2017-03-21 10:03:11 -06:00
blk-settings.c	block: optionally merge discontiguous discard bios into a single request	2017-02-08 13:43:08 -07:00
blk-softirq.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/topology.h>	2017-03-02 08:42:26 +01:00
blk-stat.c	blk-throttle: add a mechanism to estimate IO latency	2017-03-28 08:02:20 -06:00
blk-stat.h	blk-throttle: add a mechanism to estimate IO latency	2017-03-28 08:02:20 -06:00
blk-sysfs.c	blk-throttle: choose a small throtl_slice for SSD	2017-03-28 08:02:20 -06:00
blk-tag.c	blk-mq-sched: add framework for MQ capable IO schedulers	2017-01-17 10:04:20 -07:00
blk-throttle.c	blk-throttle: add latency target support	2017-03-28 08:02:20 -06:00
blk-timeout.c	block: remove REQ_NO_TIMEOUT flag	2015-12-22 09:38:34 -07:00
blk-wbt.c	blk-stat: convert to callback-based statistics reporting	2017-03-21 10:03:11 -06:00
blk-wbt.h	block: track request size in blk_issue_stat	2017-03-28 08:02:20 -06:00
blk-zoned.c	block: Rename blk_queue_zone_size and bdev_zone_size	2017-01-12 07:58:32 -07:00
blk.h	blk-throttle: add a mechanism to estimate IO latency	2017-03-28 08:02:20 -06:00
bounce.c	Merge branch 'for-linus' of git://git.kernel.dk/linux-block	2015-09-19 18:57:09 -07:00
bsg-lib.c	block: split scsi_request out of struct request	2017-01-27 15:08:35 -07:00
bsg.c	lib/vsprintf.c: remove %Z support	2017-02-27 18:43:47 -08:00
cfq-iosched.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
cmdline-parser.c	block: remove unrelated header files and export symbol	2014-01-21 20:18:26 -08:00
compat_ioctl.c	block: Get rid of blk_get_backing_dev_info()	2017-02-02 08:21:32 -07:00
deadline-iosched.c	block: enumify ELEVATOR_*_MERGE	2017-02-08 13:43:06 -07:00
elevator.c	block: don't call ioc_exit_icq() with the queue lock held for blk-mq	2017-03-02 13:59:08 -07:00
genhd.c	block: Fix oops scsi_disk_get()	2017-03-22 20:11:37 -06:00
ioctl.c	block: Get rid of blk_get_backing_dev_info()	2017-02-02 08:21:32 -07:00
ioprio.c	sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>	2017-03-02 08:42:38 +01:00
mq-deadline.c	block: enumify ELEVATOR_*_MERGE	2017-02-08 13:43:06 -07:00
noop-iosched.c	block: move existing elevator ops to union	2017-01-17 10:03:33 -07:00
opal_proto.h	block/sed-opal: allocate struct opal_dev dynamically	2017-02-17 12:41:47 -07:00
partition-generic.c	block: Rename blk_queue_zone_size and bdev_zone_size	2017-01-12 07:58:32 -07:00
scsi_ioctl.c	block: fold cmd_type into the REQ_OP_ space	2017-01-31 14:00:44 -07:00
sed-opal.c	block/sed: Fix opal user range check and unused variables	2017-03-08 09:56:12 -07:00
t10-pi.c	block: constify struct blk_integrity_profile	2017-03-24 20:34:39 -06:00