Vladimir Davydov 5577022f4e block: account iowait time when waiting for completion of IO request ... Using wait_for_completion() for waiting for a IO request to be executed results in wrong iowait time accounting. For example, a system having the only task doing write() and fdatasync() on a block device can be reported being idle instead of iowaiting as it should because blkdev_issue_flush() calls wait_for_completion() which in turn calls schedule() that does not increment the iowait proc counter and thus does not turn on iowait time accounting. The patch makes block layer use wait_for_completion_io() instead of wait_for_completion() where appropriate to account iowait time correctly. Signed-off-by: Vladimir Davydov <vdavydov@parallels.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2013-02-15 16:45:07 +01:00
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partitions	Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block	2012-12-17 13:39:11 -08:00
blk-cgroup.c	blkcg: make blkcg_print_blkgs() grab q locks instead of blkcg lock	2013-01-09 08:05:13 -08:00
blk-cgroup.h	blkcg: implement blkg_[rw]stat_recursive_sum() and blkg_[rw]stat_merge()	2013-01-09 08:05:12 -08:00
blk-core.c	block: add @req to bio_{front|back}_merge tracepoints	2013-01-14 15:00:36 +01:00
blk-exec.c	block: account iowait time when waiting for completion of IO request	2013-02-15 16:45:07 +01:00
blk-flush.c	block: account iowait time when waiting for completion of IO request	2013-02-15 16:45:07 +01:00
blk-integrity.c	block: add export.h to files using EXPORT_SYMBOL/THIS_MODULE macros	2011-10-31 19:31:12 -04:00
blk-ioc.c	block: uninitialized ioc->nr_tasks triggers WARN_ON	2012-08-01 12:17:27 +02:00
blk-iopoll.c	tree-wide: fix assorted typos all over the place	2009-12-04 15:39:55 +01:00
blk-lib.c	block: account iowait time when waiting for completion of IO request	2013-02-15 16:45:07 +01:00
blk-map.c	block: re-use existing 'reading' variable instead of checking direction again	2011-12-21 15:27:24 +01:00
blk-merge.c	block: Implement support for WRITE SAME	2012-09-20 14:31:45 +02:00
blk-settings.c	block: discard granularity might not be power of 2	2012-12-14 20:46:04 +01:00
blk-softirq.c	sched, block: Unify cache detection	2012-01-27 13:28:48 +01:00
blk-sysfs.c	block: RCU free request_queue	2013-01-09 08:05:13 -08:00
blk-tag.c	block/blk-tag.c: Remove useless kfree	2012-09-12 22:25:12 +02:00
blk-throttle.c	block: Rename queue dead flag	2012-12-06 14:30:58 +01:00
blk-timeout.c	block: Drop dead function blk_abort_queue()	2012-06-15 08:46:23 +02:00
blk.h	block,elevator: use new hashtable implementation	2013-01-11 14:43:13 +01:00
bsg-lib.c	bsg: Remove unused function bsg_goose_queue()	2012-12-06 14:33:02 +01:00
bsg.c	bsg: fix sysfs link remove warning	2012-02-08 20:02:03 +01:00
cfq-iosched.c	cfq-iosched: add hierarchical cfq_group statistics	2013-01-09 08:05:13 -08:00
compat_ioctl.c	block: Add BLKROTATIONAL ioctl	2012-01-11 16:29:31 +01:00
deadline-iosched.c	deadline: Allow 0ms deadline latency, increase the read speed	2012-12-09 19:19:23 +01:00
elevator.c	block,elevator: use new hashtable implementation	2013-01-11 14:43:13 +01:00
genhd.c	Merge branch 'for-3.8/drivers' of git://git.kernel.dk/linux-block	2012-12-17 13:39:11 -08:00
ioctl.c	Merge branch 'for-3.7/core' of git://git.kernel.dk/linux-block	2012-10-11 09:04:23 +09:00
Kconfig	percpu_rw_semaphore: introduce CONFIG_PERCPU_RWSEM	2012-12-17 17:15:18 -08:00
Kconfig.iosched	blkcg: make CONFIG_BLK_CGROUP bool	2012-03-06 21:27:21 +01:00
Makefile	separate partition format handling from generic code	2012-01-03 22:54:06 -05:00
noop-iosched.c	elevator: make elevator_init_fn() return 0/-errno	2012-03-06 21:27:21 +01:00
partition-generic.c	block: add partition resize function to blkpg ioctl	2012-08-01 12:24:18 +02:00
scsi_ioctl.c	scsi: Silence unnecessary warnings about ioctl to partition	2012-06-15 12:52:46 +02:00