Tomasz Majchrzak 0e5313e2d4 raid10: improve random reads performance ... RAID10 random read performance is lower than expected due to excessive spinlock utilisation which is required mostly for rebuild/resync. Simplify allow_barrier as it's in IO path and encounters a lot of unnecessary congestion. As lower_barrier just takes a lock in order to decrement a counter, convert counter (nr_pending) into atomic variable and remove the spin lock. There is also a congestion for wake_up (it uses lock internally) so call it only when it's really needed. As wake_up is not called constantly anymore, ensure process waiting to raise a barrier is notified when there are no more waiting IOs. Signed-off-by: Tomasz Majchrzak <tomasz.majchrzak@intel.com> Signed-off-by: Shaohua Li <shli@fb.com>		2016-07-19 15:20:28 -07:00
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bcache	bcache: switch to using blk_queue_write_cache()	2016-04-12 16:00:39 -06:00
persistent-data	dm space map metadata: remove unused variable in brb_pop()	2015-12-14 09:26:01 -05:00
bitmap.c	md-cluster: gather resync infos and enable recv_thread after bitmap is ready	2016-05-09 09:24:03 -07:00
bitmap.h	md-cluster: sync bitmap when node received RESYNCING msg	2016-05-04 12:39:35 -07:00
dm-bio-prison.c
dm-bio-prison.h
dm-bio-record.h
dm-bufio.c	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-01-12 17:11:47 -08:00
dm-bufio.h
dm-builtin.c
dm-cache-block-types.h
dm-cache-metadata.c	dm cache metadata: fix cmd_read_lock() acquiring write lock	2016-04-17 11:24:46 -04:00
dm-cache-metadata.h	dm cache: make sure every metadata function checks fail_io	2016-03-10 17:12:12 -05:00
dm-cache-policy-cleaner.c	- Revert a dm-multipath change that caused a regression for unprivledged	2015-11-04 21:19:53 -08:00
dm-cache-policy-internal.h
dm-cache-policy-smq.c	dm cache policy smq: clarify that mq registration failure was for 'mq'	2016-03-10 17:12:11 -05:00
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c	dm cache: bump the target version	2016-03-10 17:12:12 -05:00
dm-crypt.c	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2016-03-17 11:22:54 -07:00
dm-delay.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-era-target.c
dm-exception-store.c	- Revert a dm-multipath change that caused a regression for unprivledged	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: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-io.c	md: more open-coded offset_in_page()	2016-01-04 10:29:12 -05:00
dm-ioctl.c	dm ioctl: drop use of __GFP_REPEAT in copy_params()'s __vmalloc() call	2016-05-05 15:25:55 -04:00
dm-kcopyd.c	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
dm-linear.c
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-log.c
dm-mpath.c	dm mpath: eliminate use of spinlock in IO fast-paths	2016-05-05 15:25:52 -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-raid.c	dm raid: make sure no feature flags are set in metadata	2016-05-13 09:03:51 -04:00
dm-raid1.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-region-hash.c
dm-round-robin.c	dm round robin: use percpu 'repeat_count' and 'current_path'	2016-02-22 22:34:42 -05:00
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	dm snapshot: fix hung bios when copy error occurs	2016-01-08 20:03:05 -05:00
dm-snap-transient.c	dm snapshot: fix hung bios when copy error occurs	2016-01-08 20:03:05 -05:00
dm-snap.c	dm snapshot: disallow the COW and origin devices from being identical	2016-03-10 17:12:09 -05:00
dm-stats.c
dm-stats.h
dm-stripe.c
dm-switch.c
dm-sysfs.c
dm-table.c	block: kill off q->flush_flags	2016-04-13 13:33:19 -06:00
dm-target.c	dm: set DM_TARGET_WILDCARD feature on "error" target	2016-02-22 11:06:21 -05:00
dm-thin-metadata.c	dm thin metadata: don't issue prefetches if a transaction abort has failed	2016-03-10 17:12:09 -05:00
dm-thin-metadata.h
dm-thin.c	dm thin: unroll issue_discard() to create longer discard bio chains	2016-05-13 09:04:20 -04:00
dm-uevent.c
dm-uevent.h
dm-verity-fec.c	dm: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
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: rename target's per_bio_data_size to per_io_data_size	2016-02-22 22:34:37 -05:00
dm-verity.h	dm verity: add ignore_zero_blocks feature	2015-12-10 10:39:03 -05:00
dm-zero.c
dm.c	dm: remove unused mapped_device argument from free_tio()	2016-05-05 15:25:49 -04:00
dm.h	dm: allow immutable request-based targets to use blk-mq pdu	2016-02-22 22:34:37 -05:00
faulty.c	MD: rename some functions	2016-01-20 13:52:20 -08:00
Kconfig	dm: add missing newline between DM_DEBUG_BLOCK_STACK_TRACING and DM_BUFIO	2016-03-10 17:12:11 -05:00
linear.c
linear.h
Makefile	dm cache: make the 'mq' policy an alias for 'smq'	2016-03-10 17:12:08 -05:00
md-cluster.c	md-cluster: check the return value of process_recvd_msg	2016-05-09 09:24:04 -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	md: add missing sysfs_notify on array_state update	2016-07-19 11:28:39 -07:00
md.h	md: use seconds granularity for error logging	2016-07-19 11:00:47 -07:00
multipath.c	md: reduce the number of synchronize_rcu() calls when multiple devices fail.	2016-06-13 11:54:22 -07:00
multipath.h
raid1.c	md: reduce the number of synchronize_rcu() calls when multiple devices fail.	2016-06-13 11:54:22 -07:00
raid1.h
raid5-cache.c	Merge tag 'md/4.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md	2016-05-19 17:25:13 -07:00
raid5.c	md: reduce the number of synchronize_rcu() calls when multiple devices fail.	2016-06-13 11:54:22 -07:00
raid5.h	RAID5: revert e9e4c377e2 to fix a livelock	2016-02-26 09:44:56 -08:00
raid10.c	raid10: improve random reads performance	2016-07-19 15:20:28 -07:00
raid10.h	raid10: improve random reads performance	2016-07-19 15:20:28 -07:00
raid0.c	md/raid0: remove empty line printk from dump_zones	2016-04-25 08:43:58 -07:00
raid0.h