Tejun Heo 4c55f4f9ad blkcg: restructure blkg_policy_data allocation in blkcg_activate_policy() ... When a policy gets activated, it needs to allocate and install its policy data on all existing blkg's (blkcg_gq's). Because blkg iteration is protected by a spinlock, it currently counts the total number of blkg's in the system, allocates the matching number of policy data on a list and installs them during a single iteration. This can be simplified by using speculative GFP_NOWAIT allocations while iterating and falling back to a preallocated policy data on failure. If the preallocated one has already been consumed, it releases the lock, preallocate with GFP_KERNEL and then restarts the iteration. This can be a bit more expensive than before but policy activation is a very cold path and shouldn't matter. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@fb.com>		2015-08-18 15:49:16 -07:00
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partitions	Merge branch 'for-3.20/core' of git://git.kernel.dk/linux-block	2015-02-12 14:13:23 -08:00
bio-integrity.c	bio integrity: do not assume bio_integrity_pool exists if bioset exists	2015-07-07 07:46:47 -06:00
bio.c	block: Do a full clone when splitting discard bios	2015-07-23 16:21:34 -06:00
blk-cgroup.c	blkcg: restructure blkg_policy_data allocation in blkcg_activate_policy()	2015-08-18 15:49:16 -07:00
blk-core.c	block: use FIELD_SIZEOF to calculate size of a field	2015-07-07 07:47:37 -06:00
blk-exec.c	block: move PM request support to IDE	2015-05-05 13:40:42 -06:00
blk-flush.c	blk-mq: support per-distpatch_queue flush machinery	2014-09-25 15:22:45 -06:00
blk-integrity.c	writeback: separate out include/linux/backing-dev-defs.h	2015-06-02 08:33:34 -06:00
blk-ioc.c	block: Substitute rcu_access_pointer() for rcu_dereference_raw()	2014-02-18 12:21:26 -08:00
blk-iopoll.c	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next	2014-06-03 12:57:53 -07:00
blk-lib.c	block: Quiesce zeroout wrapper	2015-02-05 10:14:54 -07:00
blk-map.c	blk_rq_map_user(): use import_single_range()	2015-04-11 22:27:13 -04:00
blk-merge.c	block: only honor SG gap prevention for merges that contain data	2015-05-29 13:10:23 -06:00
blk-mq-cpu.c	blk-mq: add file comments and update copyright notices	2014-05-28 10:15:41 -06:00
blk-mq-cpumap.c	sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask()	2015-05-27 15:22:15 +02:00
blk-mq-sysfs.c	blk-mq: add blk_mq_init_allocated_queue and export blk_mq_register_disk	2015-03-13 08:26:53 -06:00
blk-mq-tag.c	blk-mq: Shared tag enhancements	2015-06-01 14:35:56 -06:00
blk-mq-tag.h	blk-mq: Shared tag enhancements	2015-06-01 14:35:56 -06:00
blk-mq.c	blk-mq: set default timeout as 30 seconds	2015-07-16 08:39:11 -06:00
blk-mq.h	blk-mq: release mq's kobjects in blk_release_queue()	2015-01-29 08:30:51 -08:00
blk-settings.c	block: fix blk_stack_limits() regression due to lcm() change	2015-03-31 09:45:50 -06:00
blk-softirq.c	block: fix regression with block enabled tagging	2014-04-09 21:54:06 -06:00
blk-sysfs.c	Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block	2015-06-25 16:00:17 -07:00
blk-tag.c	block: support different tag allocation policy	2015-01-23 14:15:46 -07:00
blk-throttle.c	blkcg: move block/blk-cgroup.h to include/linux/blk-cgroup.h	2015-06-02 08:33:33 -06:00
blk-timeout.c	blk-mq: Allow requests to never expire	2015-01-08 08:59:01 -07:00
blk.h	blk-mq: make plug work for mutiple disks and queues	2015-05-08 14:17:23 -06:00
bounce.c	Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block	2015-06-25 16:00:17 -07:00
bsg-lib.c	bsg: Remove unused function bsg_goose_queue()	2012-12-06 14:33:02 +01:00
bsg.c	block: Simplify bsg complete all	2015-02-04 09:57:52 -07:00
cfq-iosched.c	cfq-iosched: charge async IOs to the appropriate blkcg's instead of the root	2015-08-18 15:49:16 -07:00
cmdline-parser.c	block: remove unrelated header files and export symbol	2014-01-21 20:18:26 -08:00
compat_ioctl.c	block, bdi: an active gendisk always has a request_queue associated with it	2014-09-08 10:00:35 -06:00
deadline-iosched.c	block: Stop abusing csd.list for fifo_time	2014-02-24 14:46:32 -08:00
elevator.c	Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block	2015-06-25 16:00:17 -07:00
genhd.c	Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block	2015-06-25 16:00:17 -07:00
ioctl.c	block: replace trylock with mutex_lock in blkdev_reread_part()	2015-05-20 09:05:45 -06:00
ioprio.c	block: Fix computation of merged request priority	2014-10-31 08:30:43 -06:00
Kconfig	block: Add T10 Protection Information functions	2014-09-27 09:14:59 -06:00
Kconfig.iosched	blkcg: make CONFIG_BLK_CGROUP bool	2012-03-06 21:27:21 +01:00
Makefile	block: Add T10 Protection Information functions	2014-09-27 09:14:59 -06:00
noop-iosched.c	elevator: Fix a race in elevator switching	2013-07-03 13:25:24 +02:00
partition-generic.c	block: Fix dev_t minor allocation lifetime	2014-09-03 15:01:02 -06:00
scsi_ioctl.c	block: fix bogus EFAULT error from SG_IO ioctl	2015-06-27 11:43:34 -06:00
t10-pi.c	block: Add T10 Protection Information functions	2014-09-27 09:14:59 -06:00