Aaron Carroll 45333d5a31 cfq-iosched: fix queue depth detection ... CFQ's detection of queueing devices assumes a non-queuing device and detects if the queue depth reaches a certain threshold. Under some workloads (e.g. synchronous reads), CFQ effectively forces a unit queue depth, thus defeating the detection logic. This leads to poor performance on queuing hardware, since the idle window remains enabled. This patch inverts the sense of the logic: assume a queuing-capable device, and detect if the depth does not exceed the threshold. Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>		2008-10-09 08:56:09 +02:00
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as-iosched.c	block: make kblockd_schedule_work() take the queue as parameter	2008-10-09 08:56:09 +02:00
blk-barrier.c	Allow elevators to sort/merge discard requests	2008-10-09 08:56:02 +02:00
blk-core.c	block: don't use bio_has_data() in the completion path	2008-10-09 08:56:09 +02:00
blk-exec.c	Add some block/ source files to the kernel-api docbook. Fix kernel-doc notation in them as needed. Fix changed function parameter names. Fix typos/spellos. In comments, change REQ_SPECIAL to REQ_TYPE_SPECIAL and REQ_BLOCK_PC to REQ_TYPE_BLOCK_PC.	2008-10-09 08:56:03 +02:00
blk-integrity.c	block: implement and use {disk|part}_to_dev()	2008-10-09 08:56:07 +02:00
blk-ioc.c	cfq-iosched: fix RCU race in the cfq io_context destructor handling	2008-05-07 09:28:57 +02:00
blk-map.c	Add some block/ source files to the kernel-api docbook. Fix kernel-doc notation in them as needed. Fix changed function parameter names. Fix typos/spellos. In comments, change REQ_SPECIAL to REQ_TYPE_SPECIAL and REQ_BLOCK_PC to REQ_TYPE_BLOCK_PC.	2008-10-09 08:56:03 +02:00
blk-merge.c	block: inherit CPU completion on bio->rq and rq->rq merges	2008-10-09 08:56:09 +02:00
blk-settings.c	block: add support for IO CPU affinity	2008-10-09 08:56:09 +02:00
blk-softirq.c	block: add support for IO CPU affinity	2008-10-09 08:56:09 +02:00
blk-sysfs.c	block: add support for IO CPU affinity	2008-10-09 08:56:09 +02:00
blk-tag.c	Add some block/ source files to the kernel-api docbook. Fix kernel-doc notation in them as needed. Fix changed function parameter names. Fix typos/spellos. In comments, change REQ_SPECIAL to REQ_TYPE_SPECIAL and REQ_BLOCK_PC to REQ_TYPE_BLOCK_PC.	2008-10-09 08:56:03 +02:00
blk.h	block: add support for IO CPU affinity	2008-10-09 08:56:09 +02:00
blktrace.c	blktrace: simplify flags handling in __blk_add_trace	2008-10-09 08:56:01 +02:00
bsg.c	block: move cmdfilter from gendisk to request_queue	2008-08-27 09:50:19 +02:00
cfq-iosched.c	cfq-iosched: fix queue depth detection	2008-10-09 08:56:09 +02:00
cmd-filter.c	block: move holder_dir from disk to part0	2008-10-09 08:56:08 +02:00
compat_ioctl.c	Add BLKDISCARD ioctl to allow userspace to discard sectors	2008-10-09 08:56:02 +02:00
deadline-iosched.c	deadline-iosched: non-functional fixes	2008-10-09 08:56:03 +02:00
elevator.c	block: use linux/uaccess.h in elevator.c instead of asm variant	2008-10-09 08:56:09 +02:00
genhd.c	block: allow disk to have extended device number	2008-10-09 08:56:08 +02:00
ioctl.c	block: make partition array dynamic	2008-10-09 08:56:08 +02:00
Kconfig	block: Block layer data integrity support	2008-07-03 13:21:13 +02:00
Kconfig.iosched	update I/O sched Kconfig help texts - CFQ is now default, not AS.	2007-02-17 20:08:22 +01:00
Makefile	block: split softirq handling into blk-softirq.c	2008-10-09 08:56:09 +02:00
noop-iosched.c	block: let elv_register() return void	2007-12-18 08:29:28 +01:00
scsi_ioctl.c	SG_IO block filter whitelist missing MMC SET READ AHEAD command	2008-10-09 08:56:00 +02:00