Shaohua Li 27c0f68f07 raid5: make_request does less prepare wait ...

In NUMA machine, prepare_to_wait/finish_wait in make_request exposes a
lot of contention for sequential workload (or big request size
workload). For such workload, each bio includes several stripes. So we
can just do prepare_to_wait/finish_wait once for the whold bio instead
of every stripe.  This reduces the lock contention completely for such
workload. Random workload might have the similar lock contention too,
but I didn't see it yet, maybe because my stroage is still not fast
enough.

Signed-off-by: Shaohua Li <shli@fusionio.com>
Signed-off-by: NeilBrown <neilb@suse.de>

2014-04-09 14:42:38 +10:00

..

bcache

Merge branch 'bcache-for-3.14' of git://evilpiepirate.org/~kent/linux-bcache into for-linus

2014-01-30 12:57:55 -07:00

persistent-data

dm space map metadata: fix refcount decrement below 0 which caused corruption

2014-03-07 12:02:47 -05:00

bitmap.c

md/bitmap: don't abuse i_writecount for bitmap files.

2014-04-09 12:26:59 +10:00

bitmap.h

kernfs: s/sysfs_dirent/kernfs_node/ and rename its friends accordingly

2013-12-11 15:28:36 -08:00

dm-bio-prison.c

dm: add cache target

2013-03-01 22:45:51 +00:00

dm-bio-prison.h

dm: add cache target

2013-03-01 22:45:51 +00:00

dm-bio-record.h

dm: Refactor for new bio cloning/splitting

2013-11-23 22:33:55 -08:00

dm-bufio.c

Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block

2014-01-30 11:19:05 -08:00

dm-bufio.h

dm snapshot: use dm-bufio prefetch

2014-01-14 23:23:03 -05:00

dm-builtin.c

dm sysfs: fix a module unload race

2014-01-14 23:23:04 -05:00

dm-cache-block-types.h

dm: add cache target

2013-03-01 22:45:51 +00:00

dm-cache-metadata.c

dm cache metadata: check the metadata version when reading the superblock

2013-11-11 11:37:49 -05:00

dm-cache-metadata.h

dm cache: add passthrough mode

2013-11-11 11:37:49 -05:00

dm-cache-policy-cleaner.c

dm cache: policy change version from string to integer set

2013-03-20 17:21:27 +00:00

dm-cache-policy-internal.h

dm cache: add remove_cblock method to policy interface

2013-11-11 11:37:50 -05:00

dm-cache-policy-mq.c

dm cache mq: fix memory allocation failure for large cache devices

2014-02-28 12:18:29 -05:00

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: add policy name to status output

2014-01-16 13:44:11 -05:00

dm-cache-target.c

dm cache: fix access beyond end of origin device

2014-03-12 13:52:00 -04:00

dm-crypt.c

block: Convert drivers to immutable biovecs

2013-11-23 22:33:51 -08:00

dm-delay.c

Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block

2014-01-30 11:19:05 -08:00

dm-exception-store.c

dm: replace simple_strtoul

2012-07-27 15:07:59 +01:00

dm-exception-store.h

…

dm-flakey.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

dm-io.c

dm io: fix I/O to multiple destinations

2014-02-17 11:00:05 -05:00

dm-ioctl.c

dm: allow remove to be deferred

2013-11-09 18:20:22 -05:00

dm-kcopyd.c

dm: stop using WQ_NON_REENTRANT

2013-08-23 09:02:13 -04:00

dm-linear.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

dm-log-userspace-base.c

dm log userspace: allow mark requests to piggyback on flush requests

2014-01-21 23:46:27 -05:00

dm-log-userspace-transfer.c

connector/userns: replace netlink uses of cap_raised() with capable()

2012-05-10 23:21:39 -04:00

dm-log-userspace-transfer.h

…

dm-log.c

dm: use memweight()

2012-07-30 17:25:16 -07:00

dm-mpath.c

dm mpath: fix stalls when handling invalid ioctls

2014-02-26 09:44:44 -05:00

dm-mpath.h

…

dm-path-selector.c

md: Add module.h to all files using it implicitly

2011-10-31 19:31:18 -04:00

dm-path-selector.h

…

dm-queue-length.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-raid1.c

dm raid1: fix immutable biovec related BUG when retrying read bio

2014-02-18 10:48:57 -05:00

dm-raid.c

MD: Remember the last sync operation that was performed

2013-06-26 12:38:24 +10:00

dm-region-hash.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

dm-round-robin.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-service-time.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-snap-persistent.c

dm snapshot: fix metadata corruption

2014-03-03 17:58:13 -05:00

dm-snap-transient.c

md: Add in export.h for files using EXPORT_SYMBOL

2011-10-31 19:31:19 -04:00

dm-snap.c

Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block

2014-01-30 11:19:05 -08:00

dm-stats.c

dm stats: initialize read-only module parameter

2013-12-10 19:13:21 -05:00

dm-stats.h

dm: add statistics support

2013-09-05 20:46:06 -04:00

dm-stripe.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

dm-switch.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

dm-sysfs.c

dm sysfs: fix a module unload race

2014-01-14 23:23:04 -05:00

dm-table.c

dm table: remove unused buggy code that extends the targets array

2014-01-07 10:11:44 -05:00

dm-target.c

dm: allow error target to replace bio-based and request-based targets

2013-09-05 20:46:05 -04:00

dm-thin-metadata.c

dm thin: ensure user takes action to validate data and metadata consistency

2014-03-05 15:25:35 -05:00

dm-thin-metadata.h

dm thin: ensure user takes action to validate data and metadata consistency

2014-03-05 15:25:35 -05:00

dm-thin.c

dm thin: fix noflush suspend IO queueing

2014-03-05 15:26:59 -05:00

dm-uevent.c

md: Add in export.h for files using EXPORT_SYMBOL

2011-10-31 19:31:19 -04:00

dm-uevent.h

…

dm-verity.c

block: Generic bio chaining

2013-11-23 22:33:56 -08:00

dm-zero.c

dm: rename request variables to bios

2013-03-01 22:45:47 +00:00

dm.c

Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block

2014-01-30 11:19:05 -08:00

dm.h

dm sysfs: fix a module unload race

2014-01-14 23:23:04 -05:00

faulty.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

Kconfig

dm: fix Kconfig indentation

2014-03-03 17:31:07 -05:00

linear.c

block: Introduce new bio_split()

2013-11-23 22:33:57 -08:00

linear.h

md/linear: typedef removal: linear_conf_t -> struct linear_conf

2011-10-11 16:48:54 +11:00

Makefile

dm sysfs: fix a module unload race

2014-01-14 23:23:04 -05:00

md.c

md: avoid oops on unload if some process is in poll or select.

2014-04-09 14:42:34 +10:00

md.h

md/bitmap: don't abuse i_writecount for bitmap files.

2014-04-09 12:26:59 +10:00

multipath.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

multipath.h

md/multipath: typedef removal: multipath_conf_t -> struct mpconf

2011-10-11 16:48:57 +11:00

raid0.c

block: Introduce new bio_split()

2013-11-23 22:33:57 -08:00

raid0.h

md: add proper merge_bvec handling to RAID0 and Linear.

2012-03-19 12:46:39 +11:00

raid1.c

md/raid1: r1buf_pool_alloc: free allocate pages when subsequent allocation fails.

2014-04-09 14:42:23 +10:00

raid1.h

raid1: Rewrite the implementation of iobarrier.

2013-11-19 15:19:18 +11:00

raid5.c

raid5: make_request does less prepare wait

2014-04-09 14:42:38 +10:00

raid5.h

md update for 3.13.

2013-11-20 13:05:25 -08:00

raid10.c

Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block

2014-01-30 11:19:05 -08:00

raid10.h

MD RAID10: Improve redundancy for 'far' and 'offset' algorithms (part 1)

2013-02-26 11:55:30 +11:00