NeilBrown 97e4f42d62 md: occasionally checkpoint drive recovery to reduce duplicate effort after a crash ... Version 1.x metadata has the ability to record the status of a partially completed drive recovery. However we only update that record on a clean shutdown. It would be nice to update it on unclean shutdowns too, particularly when using a bitmap that removes much to the 'sync' effort after an unclean shutdown. One complication with checkpointing recovery is that we only know where we are up to in terms of IO requests started, not which ones have completed. And we need to know what has completed to record how much is recovered. So occasionally pause the recovery until all submitted requests are completed, then update the record of where we are up to. When we have a bitmap, we already do that pause occasionally to keep the bitmap up-to-date. So enhance that code to record the recovery offset and schedule a superblock update. And when there is no bitmap, just pause 16 times during the resync to do a checkpoint. '16' is a fairly arbitrary number. But we don't really have any good way to judge how often is acceptable, and it seems like a reasonable number for now. Signed-off-by: NeilBrown <neilb@suse.de>		2009-03-31 14:33:13 +11:00
..
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: occasionally checkpoint drive recovery to reduce duplicate effort after a crash	2009-03-31 14:33:13 +11:00
bitmap.h	md: move headers out of include/linux/raid/	2009-03-31 14:27:03 +11:00
dm-bio-list.h	dm: bio_list macro renaming	2007-10-20 02:01:11 +01:00
dm-bio-record.h
dm-crypt.c	dm: consolidate target deregistration error handling	2009-01-06 03:04:58 +00:00
dm-delay.c	dm: consolidate target deregistration error handling	2009-01-06 03:04:58 +00:00
dm-exception-store.c	dm snapshot: extend exception store functions	2009-01-06 03:05:19 +00:00
dm-exception-store.h	dm snapshot: extend exception store functions	2009-01-06 03:05:19 +00:00
dm-io.c	block: fix bad definition of BIO_RW_SYNC	2009-02-18 10:32:00 +01:00
dm-ioctl.c	dm table: rework reference counting	2009-01-06 03:05:10 +00:00
dm-kcopyd.c	block: fix bad definition of BIO_RW_SYNC	2009-02-18 10:32:00 +01:00
dm-linear.c	dm: support barriers on simple devices	2009-01-06 03:05:09 +00:00
dm-log.c	dm log: ensure log bitmap fits on log device	2009-01-06 03:05:02 +00:00
dm-mpath.c	dm mpath: move trigger_event to system workqueue	2009-01-06 03:05:13 +00:00
dm-mpath.h	dm mpath: remove is_active from struct dm_path	2008-10-10 13:36:58 +01:00
dm-path-selector.c	dm: remove dm header from targets	2008-10-21 17:44:59 +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 log: move region_size validation	2009-01-06 03:05:01 +00:00
dm-region-hash.c	dm raid1: separate region_hash interface part1	2008-10-21 17:45:06 +01:00
dm-round-robin.c	dm: remove dm header from targets	2008-10-21 17:44:59 +01:00
dm-snap-persistent.c	dm snapshot: extend exception store functions	2009-01-06 03:05:19 +00:00
dm-snap-transient.c	dm snapshot: extend exception store functions	2009-01-06 03:05:19 +00:00
dm-snap.c	dm snapshot: extend exception store functions	2009-01-06 03:05:19 +00:00
dm-snap.h	dm snapshot: extend exception store functions	2009-01-06 03:05:19 +00:00
dm-stripe.c	dm: consolidate target deregistration error handling	2009-01-06 03:04:58 +00:00
dm-sysfs.c	dm: add name and uuid to sysfs	2009-01-06 03:05:12 +00:00
dm-table.c	dm table: rework reference counting	2009-01-06 03:05:10 +00:00
dm-target.c	dm: consolidate target deregistration error handling	2009-01-06 03:04:58 +00:00
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	dm: consolidate target deregistration error handling	2009-01-06 03:04:58 +00:00
dm.c	dm: add name and uuid to sysfs	2009-01-06 03:05:12 +00:00
dm.h	dm: add name and uuid to sysfs	2009-01-06 03:05:12 +00:00
faulty.c	md: move md_k.h from include/linux/raid/ to drivers/md/	2009-03-31 14:33:13 +11:00
Kconfig	raid, fastboot: hide RAID autodetect option if MD is compiled as a module	2008-10-12 08:25:14 -07:00
linear.c	md: move md_k.h from include/linux/raid/ to drivers/md/	2009-03-31 14:33:13 +11:00
linear.h	md: move lots of #include lines out of .h files and into .c	2009-03-31 14:33:13 +11:00
Makefile	cleanup drivers/md/Makefile	2009-03-31 14:27:02 +11:00
md.c	md: occasionally checkpoint drive recovery to reduce duplicate effort after a crash	2009-03-31 14:33:13 +11:00
md.h	md: occasionally checkpoint drive recovery to reduce duplicate effort after a crash	2009-03-31 14:33:13 +11:00
mktables.c	md: raid6: Fix mktable.c	2008-02-06 10:41:18 -08:00
multipath.c	md: move md_k.h from include/linux/raid/ to drivers/md/	2009-03-31 14:33:13 +11:00
multipath.h	md: move lots of #include lines out of .h files and into .c	2009-03-31 14:33:13 +11:00
raid0.c	md: move md_k.h from include/linux/raid/ to drivers/md/	2009-03-31 14:33:13 +11:00
raid0.h	md: move lots of #include lines out of .h files and into .c	2009-03-31 14:33:13 +11:00
raid1.c	md: move md_k.h from include/linux/raid/ to drivers/md/	2009-03-31 14:33:13 +11:00
raid1.h	md: move lots of #include lines out of .h files and into .c	2009-03-31 14:33:13 +11:00
raid5.c	md: move md_k.h from include/linux/raid/ to drivers/md/	2009-03-31 14:33:13 +11:00
raid5.h	md: move lots of #include lines out of .h files and into .c	2009-03-31 14:33:13 +11:00
raid6.h	md: move lots of #include lines out of .h files and into .c	2009-03-31 14:33:13 +11:00
raid6algos.c	drivers/md: use time_before, time_before_eq, etc	2008-04-28 08:58:42 -07:00
raid6altivec.uc
raid6int.uc
raid6mmx.c	x86 merge fallout: uml	2007-10-29 07:41:32 -07:00
raid6recov.c
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: move md_k.h from include/linux/raid/ to drivers/md/	2009-03-31 14:33:13 +11:00
raid10.h	md: move lots of #include lines out of .h files and into .c	2009-03-31 14:33:13 +11:00
unroll.pl