Dan Williams c337869d95 md: do not compute parity unless it is on a failed drive ... If a block is computed (rather than read) then a check/repair operation may be lead to believe that the data on disk is correct, when infact it isn't. So only compute blocks for failed devices. This issue has been around since at least 2.6.12, but has become harder to hit in recent kernels since most reads bypass the cache. echo repair > /sys/block/mdN/md/sync_action will set the parity blocks to the correct state. Cc: <stable@kernel.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-06-06 11:29:08 -07:00
..
raid6test	md: raid6: clean up the style of raid6test/test.c	2008-02-06 10:41:18 -08:00
.gitignore	gitignore: misc files	2006-01-01 22:21:50 +01:00
bitmap.c	md: kill file_path wrapper	2008-05-24 09:56:09 -07:00
dm-bio-list.h	dm: bio_list macro renaming	2007-10-20 02:01:11 +01:00
dm-bio-record.h	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
dm-crypt.c	dm crypt: fix ctx pending	2008-03-28 14:45:22 -07:00
dm-delay.c	dm: bio_list macro renaming	2007-10-20 02:01:11 +01:00
dm-emc.c	block: no need to initialize rq->cmd with blk_get_request	2008-04-29 14:48:55 +02:00
dm-exception-store.c	dm: move include files	2008-04-25 13:26:55 +01:00
dm-hw-handler.c	dm: use kzalloc	2007-10-20 02:01:07 +01:00
dm-hw-handler.h	dm mpath: add retry pg init	2007-10-20 02:01:18 +01:00
dm-io.c	dm: unplug queues in threads	2008-04-25 13:26:57 +01:00
dm-ioctl.c	dm ioctl: use uninitialized_var	2008-02-08 02:10:16 +00:00
dm-kcopyd.c	dm: unplug queues in threads	2008-04-25 13:26:57 +01:00
dm-linear.c	[PATCH] dm: map and endio symbolic return codes	2006-12-08 08:29:09 -08:00
dm-log.c	dm: move include files	2008-04-25 13:26:55 +01:00
dm-mpath-hp-sw.c	block: no need to initialize rq->cmd with blk_get_request	2008-04-29 14:48:55 +02:00
dm-mpath-rdac.c	block: no need to initialize rq->cmd with blk_get_request	2008-04-29 14:48:55 +02:00
dm-mpath.c	dm mpath: add missing static	2008-02-08 02:10:35 +00:00
dm-mpath.h	[PATCH] struct path: rename DM's struct path	2006-12-08 08:28:40 -08:00
dm-path-selector.c	dm: use kzalloc	2007-10-20 02:01:07 +01:00
dm-path-selector.h	[PATCH] struct path: rename DM's struct path	2006-12-08 08:28:40 -08:00
dm-raid1.c	dm: unplug queues in threads	2008-04-25 13:26:57 +01:00
dm-round-robin.c	dm: remove duplicate module name from error msgs	2007-07-12 15:01:08 -07:00
dm-snap.c	dm: move include files	2008-04-25 13:26:55 +01:00
dm-snap.h	dm kcopyd: clean interface	2008-04-25 13:26:44 +01:00
dm-stripe.c	dm: stripe enhanced status return	2008-02-08 02:11:24 +00:00
dm-table.c	dm: use unlocked variants of queue flag check/set	2008-04-29 10:21:12 -07:00
dm-target.c	dm: use kzalloc	2007-10-20 02:01:07 +01:00
dm-uevent.c	md: replace remaining __FUNCTION__ occurrences	2008-04-28 08:58:42 -07:00
dm-uevent.h	dm: uevent generate events	2007-10-20 02:01:26 +01:00
dm-zero.c	Drop 'size' argument from bio_endio and bi_end_io	2007-10-10 09:25:57 +02:00
dm.c	dm: remove md argument from specific_minor	2008-04-25 13:27:02 +01:00
dm.h	dm: expose macros	2008-04-25 13:26:53 +01:00
faulty.c	md: change ITERATE_RDEV to rdev_for_each	2008-02-06 10:41:19 -08:00
Kconfig	dm: targets no longer experimental	2008-02-08 02:10:32 +00:00
linear.c	Remove blkdev warning triggered by using md	2008-05-14 19:11:15 -07:00
Makefile	dm: move include files	2008-04-25 13:26:55 +01:00
md.c	md: fix uninitialized use of mddev->recovery_wait	2008-06-06 11:29:08 -07:00
mktables.c	md: raid6: Fix mktable.c	2008-02-06 10:41:18 -08:00
multipath.c	md: restart recovery cleanly after device failure.	2008-05-24 09:56:10 -07:00
raid0.c	Remove blkdev warning triggered by using md	2008-05-14 19:11:15 -07:00
raid1.c	md: restart recovery cleanly after device failure.	2008-05-24 09:56:10 -07:00
raid5.c	md: do not compute parity unless it is on a failed drive	2008-06-06 11:29:08 -07:00
raid6.h	[PATCH] RAID6 Altivec fix	2005-09-17 11:49:58 -07:00
raid6algos.c	drivers/md: use time_before, time_before_eq, etc	2008-04-28 08:58:42 -07:00
raid6altivec.uc	[PATCH] RAID6 Altivec fix	2005-09-17 11:49:58 -07:00
raid6int.uc	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
raid6mmx.c	x86 merge fallout: uml	2007-10-29 07:41:32 -07:00
raid6recov.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
raid6sse1.c	x86 merge fallout: uml	2007-10-29 07:41:32 -07:00
raid6sse2.c	x86 merge fallout: uml	2007-10-29 07:41:32 -07:00
raid6x86.h	x86 merge fallout: uml	2007-10-29 07:41:32 -07:00
raid10.c	md: restart recovery cleanly after device failure.	2008-05-24 09:56:10 -07:00
unroll.pl	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00