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ca5beb76c32af33e5be4e01c85c8bd5a067c4543
linux/drivers/md
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Bart Van Assche ca5beb76c3 dm mpath: micro-optimize the hot path relative to MPATHF_QUEUE_IF_NO_PATH 
Instead of checking MPATHF_QUEUE_IF_NO_PATH,
MPATHF_SAVED_QUEUE_IF_NO_PATH and the no_flush flag to decide whether
or not to push back a request (or bio) if there are no paths available,
only clear MPATHF_QUEUE_IF_NO_PATH in queue_if_no_path() if no_flush has
not been set.  The result is that only a single bit has to be tested in
the hot path to decide whether or not a request must be pushed back and
also that m->lock does not have to be taken in the hot path.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2017-04-27 17:08:45 -04:00
..
bcache
sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>
2017-03-02 08:42:38 +01:00
persistent-data
dm block manager: remove an unused argument from dm_block_manager_create()
2017-04-27 17:08:41 -04:00
bitmap.c
md: separate flags for superblock changes
2016-12-08 22:01:47 -08:00
bitmap.h
md-cluster: sync bitmap when node received RESYNCING msg
2016-05-04 12:39:35 -07:00
dm-bio-prison-v1.c
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-prison-v1.h
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-prison-v2.c
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-prison-v2.h
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-record.h
…
dm-bufio.c
dm bufio: add sector start offset to dm-bufio interface
2017-03-07 13:28:33 -05:00
dm-bufio.h
dm bufio: add sector start offset to dm-bufio interface
2017-03-07 13:28:33 -05:00
dm-builtin.c
dm: move request-based code out to dm-rq.[hc]
2016-06-10 15:15:44 -04:00
dm-cache-background-tracker.c
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-background-tracker.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-block-types.h
linux: drop __bitwise__ everywhere
2016-12-16 00:13:41 +02:00
dm-cache-metadata.c
dm block manager: remove an unused argument from dm_block_manager_create()
2017-04-27 17:08:41 -04:00
dm-cache-metadata.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-policy-internal.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-policy-smq.c
dm cache policy smq: make the cleaner policy write-back more aggressively
2017-03-31 11:41:05 -04:00
dm-cache-policy.c
dm cache: add policy name to status output
2014-01-16 13:44:11 -05:00
dm-cache-policy.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-target.c
dm cache: set/clear the cache core's dirty_bitset when loading mappings
2017-03-31 11:33:44 -04:00
dm-core.h
dm: introduce enum dm_queue_mode to cleanup related code
2017-04-27 17:08:44 -04:00
dm-crypt.c
dm crypt: replace custom implementation of hex2bin()
2017-04-27 12:08:31 -04:00
dm-delay.c
dm: mark targets that pass integrity data
2017-04-24 12:04:32 -04:00
dm-era-target.c
dm block manager: remove an unused argument from dm_block_manager_create()
2017-04-27 17:08:41 -04:00
dm-exception-store.c
Merge tag 'dm-4.4-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2015-11-04 21:19:53 -08:00
dm-exception-store.h
dm snapshot: fix hung bios when copy error occurs
2016-01-08 20:03:05 -05:00
dm-flakey.c
dm flakey: introduce "error_writes" feature
2016-12-13 15:01:31 -05:00
dm-integrity.c
dm integrity: use previously calculated log2 of sectors_per_block
2017-04-27 12:16:32 -04:00
dm-io.c
dm io: use bvec iterator helpers to implement .get_page and .next_page
2016-11-21 09:51:57 -05:00
dm-ioctl.c
dm: introduce enum dm_queue_mode to cleanup related code
2017-04-27 17:08:44 -04:00
dm-kcopyd.c
dm: move request-based code out to dm-rq.[hc]
2016-06-10 15:15:44 -04:00
dm-linear.c
dm: mark targets that pass integrity data
2017-04-24 12:04:32 -04:00
dm-log-userspace-base.c
dm: drop NULL test before kmem_cache_destroy() and mempool_destroy()
2015-10-31 19:06:00 -04:00
dm-log-userspace-transfer.c
dm log userspace transfer: match wait_for_completion_timeout return type
2015-04-15 12:10:20 -04:00
dm-log-userspace-transfer.h
…
dm-log-writes.c
Merge branch 'for-4.9/block' of git://git.kernel.dk/linux-block
2016-10-07 14:42:05 -07:00
dm-log.c
block,fs: use REQ_* flags directly
2016-11-01 09:43:26 -06:00
dm-mpath.c
dm mpath: micro-optimize the hot path relative to MPATHF_QUEUE_IF_NO_PATH
2017-04-27 17:08:45 -04:00
dm-mpath.h
…
dm-path-selector.c
…
dm-path-selector.h
dm path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-queue-length.c
dm path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-raid1.c
Merge branch 'for-4.10/block' of git://git.kernel.dk/linux-block
2016-12-13 10:19:16 -08:00
dm-raid.c
dm raid: add raid4/5/6 journal write-back support via journal_mode option
2017-03-27 12:08:07 -04:00
dm-region-hash.c
block: rename bio bi_rw to bi_opf
2016-08-07 14:41:02 -06:00
dm-round-robin.c
dm round robin: revert "use percpu 'repeat_count' and 'current_path'"
2017-02-17 00:54:09 -05:00
dm-rq.c
dm rq: check blk_mq_register_dev() return value in dm_mq_init_request_queue()
2017-04-27 17:08:40 -04:00
dm-rq.h
dm: always defer request allocation to the owner of the request_queue
2017-01-27 15:08:35 -07:00
dm-service-time.c
dm path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-snap-persistent.c
block,fs: use REQ_* flags directly
2016-11-01 09:43:26 -06:00
dm-snap-transient.c
dm snapshot: fix hung bios when copy error occurs
2016-01-08 20:03:05 -05:00
dm-snap.c
block: rename bio bi_rw to bi_opf
2016-08-07 14:41:02 -06:00
dm-stats.c
dm stats: fix a leaked s->histogram_boundaries array
2017-02-16 14:17:07 -05:00
dm-stats.h
dm stats: support precise timestamps
2015-06-17 12:40:40 -04:00
dm-stripe.c
dm: mark targets that pass integrity data
2017-04-24 12:04:32 -04:00
dm-switch.c
dm switch: simplify conditional in alloc_region_table()
2015-10-31 19:06:06 -04:00
dm-sysfs.c
dm: move request-based code out to dm-rq.[hc]
2016-06-10 15:15:44 -04:00
dm-table.c
dm: introduce enum dm_queue_mode to cleanup related code
2017-04-27 17:08:44 -04:00
dm-target.c
dm: always defer request allocation to the owner of the request_queue
2017-01-27 15:08:35 -07:00
dm-thin-metadata.c
dm block manager: remove an unused argument from dm_block_manager_create()
2017-04-27 17:08:41 -04:00
dm-thin-metadata.h
dm thin: fix a race condition between discarding and provisioning a block
2016-07-20 12:43:35 -04:00
dm-thin.c
dm thin: fix a memory leak when passing discard bio down
2017-04-24 14:58:10 -04:00
dm-uevent.c
…
dm-uevent.h
…
dm-verity-fec.c
dm verity: switch to using asynchronous hash crypto API
2017-04-24 15:37:04 -04:00
dm-verity-fec.h
dm verity: add support for forward error correction
2015-12-10 10:39:03 -05:00
dm-verity-target.c
dm verity: switch to using asynchronous hash crypto API
2017-04-24 15:37:04 -04:00
dm-verity.h
dm verity: switch to using asynchronous hash crypto API
2017-04-24 15:37:04 -04:00
dm-zero.c
block: rename bio bi_rw to bi_opf
2016-08-07 14:41:02 -06:00
dm.c
dm: introduce enum dm_queue_mode to cleanup related code
2017-04-27 17:08:44 -04:00
dm.h
dm: introduce enum dm_queue_mode to cleanup related code
2017-04-27 17:08:44 -04:00
faulty.c
md: fast clone bio in bio_clone_mddev()
2017-02-15 11:24:54 -08:00
Kconfig
dm raid: select the Kconfig option CONFIG_MD_RAID0
2017-03-30 11:17:08 -04:00
linear.c
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2017-02-24 14:42:19 -08:00
linear.h
md linear: fix a race between linear_add() and linear_congested()
2017-02-13 09:17:50 -08:00
Makefile
dm: add integrity target
2017-03-24 15:49:07 -04:00
md-cluster.c
md-cluster: make resync lock also could be interruptted
2016-09-21 09:09:44 -07:00
md-cluster.h
md-cluster: gather resync infos and enable recv_thread after bitmap is ready
2016-05-09 09:24:03 -07:00
md.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>
2017-03-02 08:42:29 +01:00
md.h
md: fast clone bio in bio_clone_mddev()
2017-02-15 11:24:54 -08:00
multipath.c
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2017-02-24 14:42:19 -08:00
multipath.h
…
raid0.c
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2017-02-24 14:42:19 -08:00
raid0.h
block: kill merge_bvec_fn() completely
2015-08-13 12:31:57 -06:00
raid1.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>
2017-03-02 08:42:29 +01:00
raid1.h
RAID1: avoid unnecessary spin locks in I/O barrier code
2017-02-19 22:04:25 -08:00
raid5-cache.c
md: add raid4/5/6 journal mode switching API
2017-03-27 11:13:47 -04:00
raid5.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>
2017-03-02 08:42:29 +01:00
raid5.h
md: add raid4/5/6 journal mode switching API
2017-03-27 11:13:47 -04:00
raid10.c
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2017-02-24 14:42:19 -08:00
raid10.h
md/raid10: add failfast handling for reads.
2016-11-22 09:14:28 -08:00