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Bart Van Assche bce0363ed8 block/mq-deadline: Stop using per-CPU counters 
Calculating the sum over all CPUs of per-CPU counters frequently is
inefficient. Hence switch from per-CPU to individual counters. Three
counters are protected by the mq-deadline spinlock since these are
only accessed from contexts that already hold that spinlock. The fourth
counter is atomic because protecting it with the mq-deadline spinlock
would trigger lock contention.

Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Niklas Cassel <Niklas.Cassel@wdc.com>
Cc: Hannes Reinecke <hare@suse.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20210927220328.1410161-4-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-10-18 06:17:02 -06:00
..
partitions
block: drop unused includes in <linux/genhd.h>
2021-10-18 06:17:02 -06:00
badblocks.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
bdev.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00
bfq-cgroup.c
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
bfq-iosched.c
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
bfq-iosched.h
block, bfq: cleanup the repeated declaration
2021-08-25 06:45:33 -06:00
bfq-wf2q.c
block: Introduce IOPRIO_NR_LEVELS
2021-08-18 07:21:12 -06:00
bio-integrity.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00
bio.c
block: don't call rq_qos_ops->done_bio if the bio isn't tracked
2021-09-24 11:04:39 -06:00
blk-cgroup-rwstat.c
blk-cgroup: Fix the recursive blkg rwstat
2021-03-05 11:32:15 -07:00
blk-cgroup-rwstat.h
blk-cgroup: separate out blkg_rwstat under CONFIG_BLK_CGROUP_RWSTAT
2019-11-07 12:28:13 -07:00
blk-cgroup.c
blk-cgroup: blk_cgroup_bio_start() should use irq-safe operations on blkg->iostat_cpu
2021-10-18 06:17:01 -06:00
blk-core.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00
blk-crypto-fallback.c
block: move struct request to blk-mq.h
2021-10-18 06:17:02 -06:00
blk-crypto-internal.h
block: move struct request to blk-mq.h
2021-10-18 06:17:02 -06:00
blk-crypto.c
blk-crypto: fix check for too-large dun_bytes
2021-08-25 06:45:00 -06:00
blk-exec.c
block: return errors from blk_execute_rq()
2021-06-30 15:35:45 -06:00
blk-flush.c
blk-mq: fix is_flush_rq
2021-08-17 20:17:34 -06:00
blk-integrity.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00
blk-ioc.c
block: remove retry loop in ioc_release_fn()
2020-07-16 10:22:15 -06:00
blk-iocost.c
for-5.15/block-2021-08-30
2021-08-30 18:52:11 -07:00
blk-iolatency.c
mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h>
2021-10-18 06:17:01 -06:00
blk-ioprio.c
block: Introduce the ioprio rq-qos policy
2021-06-21 15:03:40 -06:00
blk-ioprio.h
block: Introduce the ioprio rq-qos policy
2021-06-21 15:03:40 -06:00
blk-lib.c
block: export blk_next_bio()
2021-06-17 15:51:20 +02:00
blk-map.c
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
blk-merge.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00
blk-mq-cpumap.c
blk-mq: remove the calling of local_memory_node()
2020-10-20 07:08:17 -06:00
blk-mq-debugfs-zoned.c
block: Cleanup license notice
2019-01-17 21:21:40 -07:00
blk-mq-debugfs.c
block: decode QUEUE_FLAG_HCTX_ACTIVE in debugfs output
2021-10-04 06:58:39 -06:00
blk-mq-debugfs.h
blk-mq: no need to check return value of debugfs_create functions
2019-06-13 03:00:30 -06:00
blk-mq-pci.c
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq-rdma.c
block: Fix blk_mq_*_map_queues() kernel-doc headers
2019-05-31 15:12:34 -06:00
blk-mq-sched.c
blk-mq-sched: Fix blk_mq_sched_alloc_tags() error handling
2021-07-27 16:44:38 -06:00
blk-mq-sched.h
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
blk-mq-sysfs.c
block: remove blk-mq-sysfs dead code
2021-08-02 13:37:29 -06:00
blk-mq-tag.c
blk-mq: avoid to iterate over stale request
2021-09-12 19:32:43 -06:00
blk-mq-tag.h
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
blk-mq-virtio.c
blk-mq: Fix typo in comment
2020-03-17 20:55:21 +01:00
blk-mq.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00
blk-mq.h
blk: Fix lock inversion between ioc lock and bfqd lock
2021-06-24 18:43:55 -06:00
blk-pm.c
scsi: block: Fix a race in the runtime power management code
2020-12-09 11:41:41 -05:00
blk-pm.h
block: Remove unused blk_pm_*() function definitions
2021-02-22 06:33:48 -07:00
blk-rq-qos.c
rq-qos: fix missed wake-ups in rq_qos_throttle try two
2021-06-08 15:12:57 -06:00
blk-rq-qos.h
block: Introduce the ioprio rq-qos policy
2021-06-21 15:03:40 -06:00
blk-settings.c
block: add an explicit ->disk backpointer to the request_queue
2021-08-23 12:54:31 -06:00
blk-stat.c
blk-stat: make q->stats->lock irqsafe
2020-09-01 16:48:46 -06:00
blk-stat.h
block: deactivate blk_stat timer in wbt_disable_default()
2018-12-12 06:47:51 -07:00
blk-sysfs.c
block: call blk_register_queue earlier in device_add_disk
2021-08-23 12:55:45 -06:00
blk-throttle.c
blk-throttle: fix UAF by deleteing timer in blk_throtl_exit()
2021-09-07 08:36:56 -06:00
blk-timeout.c
block: blk-timeout: delete duplicated word
2020-07-31 16:29:47 -06:00
blk-wbt.c
block: add an explicit ->disk backpointer to the request_queue
2021-08-23 12:54:31 -06:00
blk-wbt.h
blk-wbt: introduce a new disable state to prevent false positive by rwb_enabled()
2021-06-21 15:03:41 -06:00
blk-zoned.c
blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN
2021-08-24 10:12:36 -06:00
blk.h
block: move a few merge helpers out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00
bounce.c
mm: don't include <linux/blk-cgroup.h> in <linux/backing-dev.h>
2021-10-18 06:17:01 -06:00
bsg-lib.c
scsi: bsg-lib: Fix commands without data transfer in bsg_transport_sg_io_fn()
2021-08-01 13:21:40 -04:00
bsg.c
scsi: bsg: Fix device unregistration
2021-09-14 00:22:15 -04:00
disk-events.c
block: return errors from disk_alloc_events
2021-08-23 12:55:45 -06:00
elevator.c
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
elevator.h
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
fops.c
block: hold ->invalidate_lock in blkdev_fallocate
2021-09-24 11:06:58 -06:00
genhd.c
block: drop unused includes in <linux/genhd.h>
2021-10-18 06:17:02 -06:00
holder.c
block: drop unused includes in <linux/genhd.h>
2021-10-18 06:17:02 -06:00
ioctl.c
block: pass a gendisk to bdev_resize_partition
2021-08-12 10:31:36 -06:00
ioprio.c
block: fix default IO priority handling
2021-08-18 07:23:15 -06:00
Kconfig
SCSI misc on 20210902
2021-09-02 15:09:46 -07:00
Kconfig.iosched
Revert "block/mq-deadline: Add cgroup support"
2021-08-11 13:47:26 -06:00
keyslot-manager.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00
kyber-iosched.c
block: move elevator.h to block/
2021-10-18 06:17:01 -06:00
Makefile
block-5.15-2021-09-11
2021-09-11 10:19:51 -07:00
mq-deadline.c
block/mq-deadline: Stop using per-CPU counters
2021-10-18 06:17:02 -06:00
opal_proto.h
block: sed-opal: Change the check condition for regular session validity
2020-03-12 08:00:10 -06:00
sed-opal.c
block: sed-opal: Change the check condition for regular session validity
2020-03-12 08:00:10 -06:00
t10-pi.c
block: move integrity handling out of <linux/blkdev.h>
2021-10-18 06:17:02 -06:00