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d0a4bb4927
linux/drivers/md
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NeilBrown d0a4bb4927 md: never clear bit from the write-intent bitmap when the array is degraded. 
It is safe to clear a bit from the write-intent bitmap for a raid1
if we know the data has been written to all devices, which is
what the current test does.

But it is not always safe to update the 'events_cleared' counter in
that case.  This is because one request could complete successfully
after some other request has partially failed.

So simply disable the clearing and updating of events_cleared whenever
the array is degraded.  This might end up not clearing some bits that
could safely be cleared, but it is safest approach.

Note that the bug fixed here did not risk corrupting data by letting
the array get out-of-sync.  Rather it meant that when a device is
removed and re-added to the array, it might incorrectly require a full
recovery rather than just recovering based on the bitmap.

Signed-off-by: NeilBrown <neilb@suse.de>
2009-03-31 14:27:02 +11:00
..
raid6test md: raid6: clean up the style of raid6test/test.c 2008-02-06 10:41:18 -08:00
.gitignore
bitmap.c md: never clear bit from the write-intent bitmap when the array is degraded. 2009-03-31 14:27:02 +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
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: use list_for_each_entry macro directly 2009-01-09 08:31:08 +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: Fix a bug in linear.c causing which_dev() to return the wrong device. 2009-02-06 15:10:52 +11:00
Makefile dm snapshot: split out exception store implementations 2009-01-06 03:05:17 +00:00
md.c md: Fix is_mddev_idle test (again). 2009-03-31 14:27:02 +11:00
mktables.c md: raid6: Fix mktable.c 2008-02-06 10:41:18 -08:00
multipath.c md: use list_for_each_entry macro directly 2009-01-09 08:31:08 +11:00
raid0.c md: use list_for_each_entry macro directly 2009-01-09 08:31:08 +11:00
raid1.c md: avoid races when stopping resync. 2009-02-25 13:18:47 +11:00
raid5.c md: use list_for_each_entry macro directly 2009-01-09 08:31:08 +11:00
raid6.h md: Remove unnecessary #includes, #defines, and function declarations. 2008-10-13 11:55:12 +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: avoid races when stopping resync. 2009-02-25 13:18:47 +11:00
unroll.pl