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Jonathan Brassow fe5d2f4a15 DM RAID: Add support for MD's RAID10 "far" and "offset" algorithms 
DM RAID:  Add support for MD's RAID10 "far" and "offset" algorithms

Until now, dm-raid.c only supported the "near" algorthm of MD's RAID10
implementation.  This patch adds support for the "far" and "offset"
algorithms, but only with the improved redundancy that is brought with
the introduction of the 'use_far_sets' bit, which shifts copied stripes
according to smaller sets vs the entire array.  That is, the 17th bit
of the 'layout' variable that defines the RAID10 implementation will
always be set.   (More information on how the 'layout' variable selects
the RAID10 algorithm can be found in the opening comments of
drivers/md/raid10.c.)

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
2013-02-26 11:55:36 +11:00
..
persistent-data Miscellaneous device-mapper fixes, cleanups and performance improvements. 2012-12-21 17:08:06 -08:00
bitmap.c md/bitmap:Don't use IS_ERR to judge alloc_page(). 2012-10-11 13:45:36 +11:00
bitmap.h
dm-bio-prison.c dm thin: replace dm_cell_release_singleton with cell_defer_except 2012-12-21 20:23:31 +00:00
dm-bio-prison.h dm thin: replace dm_cell_release_singleton with cell_defer_except 2012-12-21 20:23:31 +00:00
dm-bio-record.h
dm-bufio.c dm: use ACCESS_ONCE for sysfs values 2012-10-12 16:59:46 +01:00
dm-bufio.h
dm-crypt.c dm: remove map_info 2012-12-21 20:23:41 +00:00
dm-delay.c dm: remove map_info 2012-12-21 20:23:41 +00:00
dm-exception-store.c
dm-exception-store.h
dm-flakey.c dm: remove map_info 2012-12-21 20:23:41 +00:00
dm-io.c dm kcopyd: add WRITE SAME support to dm_kcopyd_zero 2012-12-21 20:23:37 +00:00
dm-ioctl.c dm ioctl: use kmalloc if possible 2012-12-21 20:23:36 +00:00
dm-kcopyd.c dm kcopyd: add WRITE SAME support to dm_kcopyd_zero 2012-12-21 20:23:37 +00:00
dm-linear.c dm: remove map_info 2012-12-21 20:23:41 +00:00
dm-log-userspace-base.c
dm-log-userspace-transfer.c
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 check for null mpio in end_io fn 2012-10-12 16:59:42 +01:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid1.c dm: remove map_info 2012-12-21 20:23:41 +00:00
dm-raid.c DM RAID: Add support for MD's RAID10 "far" and "offset" algorithms 2013-02-26 11:55:36 +11:00
dm-region-hash.c
dm-round-robin.c
dm-service-time.c
dm-snap-persistent.c
dm-snap-transient.c
dm-snap.c dm: remove map_info 2012-12-21 20:23:41 +00:00
dm-stripe.c dm stripe: add WRITE SAME support 2012-12-21 20:23:41 +00:00
dm-sysfs.c
dm-table.c dm: introduce per_bio_data 2012-12-21 20:23:38 +00:00
dm-target.c dm: remove map_info 2012-12-21 20:23:41 +00:00
dm-thin-metadata.c dm persistent data: fix nested btree deletion 2012-12-21 20:23:32 +00:00
dm-thin-metadata.h dm thin metadata: introduce dm_pool_abort_metadata 2012-07-27 15:08:15 +01:00
dm-thin.c dm thin: fix queue limits stacking 2013-01-31 14:11:14 +00:00
dm-uevent.c
dm-uevent.h
dm-verity.c dm: remove map_info 2012-12-21 20:23:41 +00:00
dm-zero.c dm: remove map_info 2012-12-21 20:23:41 +00:00
dm.c dm: fix write same requests counting 2013-01-31 14:23:36 +00:00
dm.h dm: introduce per_bio_data 2012-12-21 20:23:38 +00:00
faulty.c md faulty: use disk_stack_limits() 2012-10-22 10:44:55 +11:00
Kconfig dm thin: move bio_prison code to separate module 2012-10-12 21:02:13 +01:00
linear.c md: linear supports TRIM 2012-10-11 13:08:44 +11:00
linear.h
Makefile dm thin: move bio_prison code to separate module 2012-10-12 21:02:13 +01:00
md.c md: protect against crash upon fsync on ro array 2013-02-21 13:28:09 +11:00
md.h md update for 3.8 2012-12-18 09:32:44 -08:00
multipath.c MD: change the parameter of md thread 2012-10-11 13:34:00 +11:00
multipath.h
raid0.c md: raid 0 supports TRIM 2012-10-11 13:25:44 +11:00
raid0.h
raid1.c md: raid1,10: Handle REQ_WRITE_SAME flag in write bios 2013-02-26 11:55:21 +11:00
raid1.h md/raid1: prevent merging too large request 2012-07-31 10:03:53 +10:00
raid5.c md update for 3.8 2012-12-18 09:32:44 -08:00
raid5.h MD: raid5 trim support 2012-10-11 13:49:05 +11:00
raid10.c MD RAID10: Improve redundancy for 'far' and 'offset' algorithms (part 2) 2013-02-26 11:55:33 +11:00
raid10.h MD RAID10: Improve redundancy for 'far' and 'offset' algorithms (part 1) 2013-02-26 11:55:30 +11:00