Jens Axboe e34cbd3074 blk-wbt: add general throttling mechanism ... We can hook this up to the block layer, to help throttle buffered writes. wbt registers a few trace points that can be used to track what is happening in the system: wbt_lat: 259:0: latency 2446318 wbt_stat: 259:0: rmean=2446318, rmin=2446318, rmax=2446318, rsamples=1, wmean=518866, wmin=15522, wmax=5330353, wsamples=57 wbt_step: 259:0: step down: step=1, window=72727272, background=8, normal=16, max=32 This shows a sync issue event (wbt_lat) that exceeded it's time. wbt_stat dumps the current read/write stats for that window, and wbt_step shows a step down event where we now scale back writes. Each trace includes the device, 259:0 in this case. Signed-off-by: Jens Axboe <axboe@fb.com>		2016-11-10 13:53:32 -07:00
..
partitions	block: atari: Return early for unsupported sector size	2016-07-13 09:31:44 -07:00
badblocks.c	block, badblocks: introduce devm_init_badblocks	2016-01-09 08:39:04 -08:00
bio-integrity.c	block: remove bio_is_rw	2016-10-28 08:45:17 -06:00
bio.c	block: add bio_iov_iter_get_pages()	2016-11-02 10:50:18 -06:00
blk-cgroup.c	blkcg: Unlock blkcg_pol_mutex only once when cpd == NULL	2016-09-30 10:31:20 +02:00
blk-core.c	block: add scalable completion tracking of requests	2016-11-10 13:53:26 -07:00
blk-exec.c	block: split out request-only flags into a new namespace	2016-10-28 08:45:17 -06:00
blk-flush.c	block: set REQ_SYNC if we clear REQ_FUA|REQ_PREFLUSH	2016-11-08 19:39:28 -07:00
blk-integrity.c	block, libnvdimm, nvme: provide a built-in blk_integrity nop profile	2015-10-21 14:43:45 -06:00
blk-ioc.c	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
blk-lib.c	block: better op and flags encoding	2016-10-28 08:48:16 -06:00
blk-map.c	block: better op and flags encoding	2016-10-28 08:48:16 -06:00
blk-merge.c	block: split out request-only flags into a new namespace	2016-10-28 08:45:17 -06:00
blk-mq-cpumap.c	blk-mq: allow the driver to pass in a queue mapping	2016-09-15 08:42:03 -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-sysfs.c	block: add scalable completion tracking of requests	2016-11-10 13:53:26 -07:00
blk-mq-tag.c	Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block	2016-10-09 17:29:33 -07:00
blk-mq-tag.h	Merge branch 'for-4.9/block-irq' of git://git.kernel.dk/linux-block	2016-10-09 17:29:33 -07:00
blk-mq.c	block: add scalable completion tracking of requests	2016-11-10 13:53:26 -07:00
blk-mq.h	block: add scalable completion tracking of requests	2016-11-10 13:53:26 -07:00
blk-settings.c	block: add code to track actual device queue depth	2016-11-05 17:09:53 -06:00
blk-softirq.c	This adds a new gcc plugin named "latent_entropy". It is designed to	2016-10-15 10:03:15 -07:00
blk-stat.c	block: add scalable completion tracking of requests	2016-11-10 13:53:26 -07:00
blk-stat.h	block: add scalable completion tracking of requests	2016-11-10 13:53:26 -07:00
blk-sysfs.c	block: add scalable completion tracking of requests	2016-11-10 13:53:26 -07:00
blk-tag.c	block: split out request-only flags into a new namespace	2016-10-28 08:45:17 -06:00
blk-throttle.c	block: replace REQ_THROTTLED with a bio flag	2016-10-28 08:45:17 -06:00
blk-timeout.c	block: remove REQ_NO_TIMEOUT flag	2015-12-22 09:38:34 -07:00
blk-wbt.c	blk-wbt: add general throttling mechanism	2016-11-10 13:53:32 -07:00
blk-wbt.h	blk-wbt: add general throttling mechanism	2016-11-10 13:53:32 -07:00
blk-zoned.c	block: zoned: fix harmless maybe-uninitialized warning	2016-10-24 20:51:22 -06:00
blk.h	block: split out request-only flags into a new namespace	2016-10-28 08:45:17 -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	bsg: Remove unused function bsg_goose_queue()	2012-12-06 14:33:02 +01:00
bsg.c	block: drop q argument from bsg_validate_sgv4_hdr	2016-11-03 07:56:14 -06:00
cfq-iosched.c	block: cfq_cpd_alloc() should use @gfp	2016-11-10 10:10:04 -07:00
cmdline-parser.c	block: remove unrelated header files and export symbol	2014-01-21 20:18:26 -08:00
compat_ioctl.c	mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros	2016-04-04 10:41:08 -07:00
deadline-iosched.c	block: do not merge requests without consulting with io scheduler	2016-07-20 21:35:12 -06:00
elevator.c	block: better op and flags encoding	2016-10-28 08:48:16 -06:00
genhd.c	block: fix bdi vs gendisk lifetime mismatch	2016-08-04 14:19:16 -06:00
ioctl.c	blk-zoned: implement ioctls	2016-10-18 10:05:42 -06:00
ioprio.c	block: fix use-after-free in sys_ioprio_get()	2016-07-01 08:39:24 -06:00
Kconfig	blk-mq: Introduce blk_mq_quiesce_queue()	2016-11-02 12:50:19 -06:00
Kconfig.iosched	blkcg: make CONFIG_BLK_CGROUP bool	2012-03-06 21:27:21 +01:00
Makefile	blk-wbt: add general throttling mechanism	2016-11-10 13:53:32 -07:00
noop-iosched.c	elevator: use list_{first,prev,next}_entry	2015-11-16 15:21:48 -07:00
partition-generic.c	block/partition-generic.c: Remove a set-but-not-used variable	2016-06-14 09:09:15 -06:00
scsi_ioctl.c	mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM	2015-11-06 17:50:42 -08:00
t10-pi.c	block: Consolidate static integrity profile properties	2015-10-21 14:42:38 -06:00