NeilBrown 22dfdf5212 [PATCH] md: improve read speed to raid10 arrays using 'far copies' ... raid10 has two different layouts. One uses near-copies (so multiple copies of a block are at the same or similar offsets of different devices) and the other uses far-copies (so multiple copies of a block are stored a greatly different offsets on different devices). The point of far-copies is that it allows the first section (normally first half) to be layed out in normal raid0 style, and thus provide raid0 sequential read performance. Unfortunately, the read balancing in raid10 makes some poor decisions for far-copies arrays and you don't get the desired performance. So turn off that bad bit of read_balance for far-copies arrays. With this patch, read speed of an 'f2' array is comparable with a raid0 with the same number of devices, though write speed is ofcourse still very slow. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		2005-11-28 14:42:25 -08:00
..
raid6test	[PATCH] RAID6 Altivec fix	2005-09-17 11:49:58 -07:00
bitmap.c	[PATCH] md: don't pass a NULL file* into ->prepare_write()	2005-11-18 07:49:46 -08:00
dm-bio-list.h	[PATCH] device-mapper snapshot: bio_list fix	2005-11-22 09:14:31 -08:00
dm-bio-record.h
dm-crypt.c	[PATCH] Use sg_set_buf/sg_init_one where applicable	2005-10-30 11:19:43 +11:00
dm-emc.c
dm-exception-store.c	[PATCH] vfree and kfree cleanup in drivers/	2005-09-10 10:06:30 -07:00
dm-hw-handler.c
dm-hw-handler.h
dm-io.c	[PATCH] gfp flags annotations - part 1	2005-10-08 15:00:57 -07:00
dm-io.h
dm-ioctl.c	[PATCH] device-mapper: list_versions fix	2005-11-22 09:14:31 -08:00
dm-linear.c
dm-log.c	[PATCH] device-mapper: mirror log bitset fix	2005-11-22 09:14:31 -08:00
dm-log.h
dm-mpath.c	[PATCH] device-mapper dm-mpath: endio spinlock fix	2005-11-22 09:14:31 -08:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-raid1.c	[PATCH] device-mapper raid1: drop mark_region spinlock fix	2005-11-22 09:14:31 -08:00
dm-round-robin.c
dm-snap.c
dm-snap.h
dm-stripe.c
dm-table.c
dm-target.c
dm-zero.c
dm.c	[PATCH] kill bio->bi_set	2005-09-07 16:57:20 -07:00
dm.h
faulty.c
Kconfig
kcopyd.c
kcopyd.h
linear.c	[BLOCK] Unify the seperate read/write io stat fields into arrays	2005-11-01 09:26:16 +01:00
Makefile
md.c	[PATCH] md: fix is_mddev_idle calculation now that disk/sector accounting happens when request completes	2005-11-18 07:49:46 -08:00
mktables.c
multipath.c	[PATCH] md: convert 'faulty' and 'in_sync' fields to bits in 'flags' field	2005-11-09 07:56:38 -08:00
raid0.c	[BLOCK] Unify the seperate read/write io stat fields into arrays	2005-11-01 09:26:16 +01:00
raid1.c	[PATCH] md: make manual repair work for raid1	2005-11-09 07:56:39 -08:00
raid5.c	[PATCH] md: fix some locking and module refcounting issues with md's use of sysfs	2005-11-09 07:56:39 -08:00
raid6.h	[PATCH] RAID6 Altivec fix	2005-09-17 11:49:58 -07:00
raid6algos.c	[PATCH] RAID6 Altivec fix	2005-09-17 11:49:58 -07:00
raid6altivec.uc	[PATCH] RAID6 Altivec fix	2005-09-17 11:49:58 -07:00
raid6int.uc
raid6main.c	[PATCH] md: convert 'faulty' and 'in_sync' fields to bits in 'flags' field	2005-11-09 07:56:38 -08:00
raid6mmx.c
raid6recov.c
raid6sse1.c
raid6sse2.c
raid6x86.h
raid10.c	[PATCH] md: improve read speed to raid10 arrays using 'far copies'	2005-11-28 14:42:25 -08:00
unroll.pl
xor.c