Jens Axboe 0d2602ca30 blk-mq: improve support for shared tags maps ... This adds support for active queue tracking, meaning that the blk-mq tagging maintains a count of active users of a tag set. This allows us to maintain a notion of fairness between users, so that we can distribute the tag depth evenly without starving some users while allowing others to try unfair deep queues. If sharing of a tag set is detected, each hardware queue will track the depth of its own queue. And if this exceeds the total depth divided by the number of active queues, the user is actively throttled down. The active queue count is done lazily to avoid bouncing that data between submitter and completer. Each hardware queue gets marked active when it allocates its first tag, and gets marked inactive when 1) the last tag is cleared, and 2) the queue timeout grace period has passed. Signed-off-by: Jens Axboe <axboe@fb.com>		2014-05-13 15:10:52 -06:00
..
partitions	block: Use macros from compiler.h instead of __attribute__((...))	2014-02-18 12:20:01 -08:00
blk-cgroup.c	Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-04-03 13:05:42 -07:00
blk-cgroup.h	Merge branch 'for-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2014-04-03 13:05:42 -07:00
blk-core.c	block: export blk_finish_request	2014-04-16 14:15:25 -06:00
blk-exec.c	blk-mq: merge blk_mq_insert_request and blk_mq_run_request	2014-03-21 08:57:37 -06:00
blk-flush.c	blk-mq: rename mq_flush_work struct request member	2014-04-16 14:15:25 -06:00
blk-integrity.c	bio-integrity: Convert to bvec_iter	2013-11-23 22:33:50 -08:00
blk-ioc.c	block: Substitute rcu_access_pointer() for rcu_dereference_raw()	2014-02-18 12:21:26 -08:00
blk-iopoll.c	block/blk-iopoll.c: use iop instead of iopoll	2014-05-02 11:37:41 -06:00
blk-lib.c	block: add cond_resched() to potentially long running ioctl discard loop	2014-02-12 09:36:37 -07:00
blk-map.c	block: remove struct request buffer member	2014-04-15 14:03:02 -06:00
blk-merge.c	block: Explicitly handle discard/write same segments	2014-02-07 13:54:08 -07:00
blk-mq-cpu.c	rt,blk,mq: Make blk_mq_cpu_notify_lock a raw spinlock	2014-03-21 08:57:56 -06:00
blk-mq-cpumap.c	blk-mq: split out tag initialization, support shared tags	2014-04-15 14:18:02 -06:00
blk-mq-sysfs.c	blk-mq: improve support for shared tags maps	2014-05-13 15:10:52 -06:00
blk-mq-tag.c	blk-mq: improve support for shared tags maps	2014-05-13 15:10:52 -06:00
blk-mq-tag.h	blk-mq: improve support for shared tags maps	2014-05-13 15:10:52 -06:00
blk-mq.c	blk-mq: improve support for shared tags maps	2014-05-13 15:10:52 -06:00
blk-mq.h	blk-mq: implement new and more efficient tagging scheme	2014-05-09 09:36:49 -06:00
blk-settings.c	bcache/md: Use raid stripe size	2014-01-08 13:05:09 -08:00
blk-softirq.c	block: fix regression with block enabled tagging	2014-04-09 21:54:06 -06:00
blk-sysfs.c	blk-mq: rework flush sequencing logic	2014-02-10 09:29:00 -07:00
blk-tag.c	block: Reserve only one queue tag for sync IO if only 3 tags are available	2013-06-28 21:32:27 +02:00
blk-throttle.c	block/blk-throttle.c: fix return of 0/1 with return type bool	2014-05-02 11:38:03 -06:00
blk-timeout.c	blk-mq: improve support for shared tags maps	2014-05-13 15:10:52 -06:00
blk.h	blk-mq: improve support for shared tags maps	2014-05-13 15:10:52 -06:00
bsg-lib.c
bsg.c
cfq-iosched.c	block: Fix format string mismatch in cfq-iosched.c	2014-04-30 15:56:10 -06:00
cmdline-parser.c	block: remove unrelated header files and export symbol	2014-01-21 20:18:26 -08:00
compat_ioctl.c	kernel-wide: fix missing validations on __get/__put/__copy_to/__copy_from_user()	2013-09-11 15:58:18 -07:00
deadline-iosched.c	block: Stop abusing csd.list for fifo_time	2014-02-24 14:46:32 -08:00
elevator.c	block: fix regression with block enabled tagging	2014-04-09 21:54:06 -06:00
genhd.c	block: Convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)	2013-09-11 13:22:03 -06:00
ioctl.c	block: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO	2013-11-08 09:05:31 -07:00
Kconfig	block: change config option name for cmdline partition parsing	2013-09-30 14:31:02 -07:00
Kconfig.iosched
Makefile	blk-mq: new multi-queue block IO queueing mechanism	2013-10-25 11:56:00 +01:00
noop-iosched.c	elevator: Fix a race in elevator switching	2013-07-03 13:25:24 +02:00
partition-generic.c	Revert "loop: cleanup partitions when detaching loop device"	2013-04-08 10:12:11 +02:00
scsi_ioctl.c	block: Fix memory leak in rw_copy_check_uvector() handling	2014-01-21 20:36:17 -08:00