Ming Lei b04f50ab8a blk-mq: only attempt to merge bio if there is rq in sw queue ... Only attempt to merge bio iff the ctx->rq_list isn't empty, because: 1) for high-performance SSD, most of times dispatch may succeed, then there may be nothing left in ctx->rq_list, so don't try to merge over sw queue if it is empty, then we can save one acquiring of ctx->lock 2) we can't expect good merge performance on per-cpu sw queue, and missing one merge on sw queue won't be a big deal since tasks can be scheduled from one CPU to another. Cc: Laurence Oberman <loberman@redhat.com> Cc: Omar Sandoval <osandov@fb.com> Cc: Bart Van Assche <bart.vanassche@wdc.com> Tested-by: Kashyap Desai <kashyap.desai@broadcom.com> Reported-by: Kashyap Desai <kashyap.desai@broadcom.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>		2018-07-09 09:07:53 -06:00
..
partitions	partitions/ldm: remove redundant pointer dgrp	2018-07-09 09:07:53 -06:00
badblocks.c
bfq-cgroup.c	block: use ktime_get_ns() instead of sched_clock() for cfq and bfq	2018-05-09 08:33:06 -06:00
bfq-iosched.c	block, bfq: give a better name to bfq_bfqq_may_idle	2018-07-09 09:07:52 -06:00
bfq-iosched.h	block, bfq: add/remove entity weights correctly	2018-07-09 09:07:52 -06:00
bfq-wf2q.c	block, bfq: fix service being wrongly set to zero in case of preemption	2018-07-09 09:07:52 -06:00
bio-integrity.c	block: Convert bio_set to mempool_init()	2018-05-14 13:16:03 -06:00
bio.c	for-linus-20180623	2018-06-24 06:33:54 +08:00
blk-cgroup.c	blkcg: init root blkcg_gq under lock	2018-04-19 08:51:59 -06:00
blk-core.c	block: Document how blk_update_request() handles RQF_SPECIAL_PAYLOAD requests	2018-07-09 09:07:52 -06:00
blk-exec.c
blk-flush.c	block: fix use-after-free in block flush handling	2018-06-09 06:37:14 -06:00
blk-integrity.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
blk-ioc.c
blk-lib.c	block: break discard submissions into the user defined size	2018-05-08 15:10:44 -06:00
blk-map.c
blk-merge.c	block: don't use blocking queue entered for recursive bio submits	2018-06-02 20:35:00 -06:00
blk-mq-cpumap.c	blk-mq: don't keep offline CPUs mapped to hctx 0	2018-04-10 08:38:46 -06:00
blk-mq-debugfs-zoned.c	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
blk-mq-debugfs.c	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
blk-mq-debugfs.h	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
blk-mq-pci.c	blk-mq: code clean-up by adding an API to clear set->mq_map	2018-07-09 09:07:53 -06:00
blk-mq-rdma.c
blk-mq-sched.c	blk-mq: only attempt to merge bio if there is rq in sw queue	2018-07-09 09:07:53 -06:00
blk-mq-sched.h	block: move sysfs_lock into elevator_init	2018-06-01 07:38:19 -06:00
blk-mq-sysfs.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
blk-mq-tag.c	blk-mq: remove blk_mq_tagset_iter	2018-06-14 17:01:45 +02:00
blk-mq-tag.h
blk-mq-virtio.c
blk-mq.c	blk-mq: use list_splice_tail_init() to insert requests	2018-07-09 09:07:53 -06:00
blk-mq.h	blk-mq: code clean-up by adding an API to clear set->mq_map	2018-07-09 09:07:53 -06:00
blk-settings.c	block: Introduce blk_queue_flag_{set,clear,test_and_{set,clear}}()	2018-03-08 14:13:48 -07:00
blk-softirq.c	block: fix timeout changes for legacy request drivers	2018-06-19 11:27:18 -06:00
blk-stat.c	block: consolidate struct request timestamp fields	2018-05-09 08:33:09 -06:00
blk-stat.h	block: consolidate struct request timestamp fields	2018-05-09 08:33:09 -06:00
blk-sysfs.c	block: convert bounce, q->bio_split to bioset_init()/mempool_init()	2018-05-30 15:33:32 -06:00
blk-tag.c	for-linus-20180616	2018-06-17 05:37:55 +09:00
blk-throttle.c	Block: blk-throttle: set low_valid immediately once one cgroup has io.low configured	2018-07-09 09:07:52 -06:00
blk-timeout.c	blk-mq: Fix timeout handling in case the timeout handler returns BLK_EH_DONE	2018-06-23 10:25:45 -06:00
blk-wbt.c	block: get rid of struct blk_issue_stat	2018-05-09 08:33:05 -06:00
blk-wbt.h	block: get rid of struct blk_issue_stat	2018-05-09 08:33:05 -06:00
blk-zoned.c	block: Remove a superfluous cast from blkdev_report_zones()	2018-07-09 09:07:52 -06:00
blk.h	block: split the blk-mq case from elevator_init	2018-06-01 07:38:21 -06:00
bounce.c	block: fixup bioset_integrity_create() call	2018-05-30 18:51:21 -06:00
bsg-lib.c	block: remove parent device reference from struct bsg_class_device	2018-05-29 13:00:25 -06:00
bsg.c	bsg: fix race of bsg_open and bsg_unregister	2018-06-15 08:15:37 -06:00
cfq-iosched.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
cmdline-parser.c
compat_ioctl.c
deadline-iosched.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
elevator.c	block: split the blk-mq case from elevator_init	2018-06-01 07:38:21 -06:00
genhd.c	Merge branch 'hch.procfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2018-06-04 10:00:01 -07:00
ioctl.c
ioprio.c	block: add ioprio_check_cap function	2018-05-31 10:50:54 -04:00
Kconfig	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
Kconfig.iosched
kyber-iosched.c	block: kyber: make kyber more friendly with merging	2018-05-30 10:47:40 -06:00
Makefile	block: Make struct request_queue smaller for CONFIG_BLK_DEV_ZONED=n	2018-07-09 09:07:52 -06:00
mq-deadline.c	block drivers/block: Use octal not symbolic permissions	2018-05-24 13:38:59 -06:00
noop-iosched.c
opal_proto.h
partition-generic.c	block: don't print a message when the device went away	2018-05-29 08:59:21 -06:00
scsi_ioctl.c	block: consistently use GFP_NOIO instead of __GFP_NORECLAIM	2018-05-14 08:55:18 -06:00
sed-opal.c	block: sed-opal: Fix a couple off by one bugs	2018-06-20 12:04:06 -06:00
t10-pi.c