Corrado Zoccolo 749ef9f842 cfq: improve fsync performance for small files ... Fsync performance for small files achieved by cfq on high-end disks is lower than what deadline can achieve, due to idling introduced between the sync write happening in process context and the journal commit. Moreover, when competing with a sequential reader, a process writing small files and fsync-ing them is starved. This patch fixes the two problems by: - marking journal commits as WRITE_SYNC, so that they get the REQ_NOIDLE flag set, - force all queues that have REQ_NOIDLE requests to be put in the noidle tree. Having the queue associated to the fsync-ing process and the one associated to journal commits in the noidle tree allows: - switching between them without idling, - fairness vs. competing idling queues, since they will be serviced only after the noidle tree expires its slice. Acked-by: Vivek Goyal <vgoyal@redhat.com> Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Tested-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Corrado Zoccolo <czoccolo@gmail.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>		2010-09-20 15:24:50 +02:00
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blk-barrier.c	block: set up rq->rq_disk properly for flush requests	2010-08-07 18:52:41 +02:00
blk-cgroup.c	blk-cgroup: cgroup changes for IOPS limit support	2010-09-16 08:42:58 +02:00
blk-cgroup.h	blk-cgroup: cgroup changes for IOPS limit support	2010-09-16 08:42:58 +02:00
blk-core.c	blkio: Core implementation of throttle policy	2010-09-16 08:42:52 +02:00
blk-exec.c	block: remove wrappers for request type/flags	2010-08-07 18:17:56 +02:00
blk-integrity.c	block/scsi: Provide a limit on the number of integrity segments	2010-09-10 20:50:10 +02:00
blk-ioc.c
blk-iopoll.c
blk-lib.c	block: add secure discard	2010-08-12 08:43:30 -07:00
blk-map.c	block: fix an address space warning in blk-map.c	2010-09-15 13:08:27 +02:00
blk-merge.c	block/scsi: Provide a limit on the number of integrity segments	2010-09-10 20:50:10 +02:00
blk-settings.c	block/scsi: Provide a limit on the number of integrity segments	2010-09-10 20:50:10 +02:00
blk-softirq.c
blk-sysfs.c	block/scsi: Provide a limit on the number of integrity segments	2010-09-10 20:50:10 +02:00
blk-tag.c
blk-throttle.c	blkio: Implementation of IOPS limit logic	2010-09-16 08:44:00 +02:00
blk-timeout.c	block: ensure jiffies wrap is handled correctly in blk_rq_timed_out_timer	2010-04-21 17:42:08 +02:00
blk.h	block/scsi: Provide a limit on the number of integrity segments	2010-09-10 20:50:10 +02:00
bsg.c
cfq-iosched.c	cfq: improve fsync performance for small files	2010-09-20 15:24:50 +02:00
cfq.h	blk-cgroup: Prepare the base for supporting more than one IO control policies	2010-09-16 08:42:04 +02:00
compat_ioctl.c	block: add secure discard	2010-08-12 08:43:30 -07:00
deadline-iosched.c
elevator.c	block: add secure discard	2010-08-12 08:43:30 -07:00
genhd.c	block: Fix race during disk initialization	2010-09-16 20:36:36 +02:00
ioctl.c	block, partition: add partition_meta_info to hd_struct	2010-09-15 16:13:18 +02:00
Kconfig	blkio: Core implementation of throttle policy	2010-09-16 08:42:52 +02:00
Kconfig.iosched	blk-cgroup: config options re-arrangement	2010-04-26 19:27:56 +02:00
Makefile	blkio: Core implementation of throttle policy	2010-09-16 08:42:52 +02:00
noop-iosched.c
scsi_ioctl.c