NeilBrown d6b42dcb99 md/raid1,raid10: avoid deadlock during resync/recovery. ... If RAID1 or RAID10 is used under LVM or some other stacking block device, it is possible to enter a deadlock during resync or recovery. This can happen if the upper level block device creates two requests to the RAID1 or RAID10. The first request gets processed, blocks recovery and queue requests for underlying requests in current->bio_list. A resync request then starts which will wait for those requests and block new IO. But then the second request to the RAID1/10 will be attempted and it cannot progress until the resync request completes, which cannot progress until the underlying device requests complete, which are on a queue behind that second request. So allow that second request to proceed even though there is a resync request about to start. This is suitable for any -stable kernel. Cc: stable@vger.kernel.org Reported-by: Ray Morris <support@bettercgi.com> Tested-by: Ray Morris <support@bettercgi.com> Signed-off-by: NeilBrown <neilb@suse.de>		2012-03-19 12:46:38 +11:00
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persistent-data	device-mapper: using EXPORT_SYBOL in dm-space-map-checker.c needs export.h	2011-11-07 10:29:10 -08:00
bitmap.c	md/bitmap: ensure to load bitmap when creating via sysfs.	2012-03-19 12:46:37 +11:00
bitmap.h	md: remove typedefs: mddev_t -> struct mddev	2011-10-11 16:47:53 +11:00
dm-bio-record.h
dm-bufio.c	device-mapper: dm-bufio.c needs to include module.h	2011-11-07 10:29:10 -08:00
dm-bufio.h	dm: add bufio	2011-10-31 20:19:09 +00:00
dm-crypt.c	dm crypt: always disable discard_zeroes_data	2011-09-25 23:26:21 +01:00
dm-delay.c	dm: convert workqueues to alloc_ordered	2011-01-13 19:59:57 +00:00
dm-exception-store.c	md: Add module.h to all files using it implicitly	2011-10-31 19:31:18 -04:00
dm-exception-store.h
dm-flakey.c	dm flakey: fix crash on read when corrupt_bio_byte not set	2012-03-07 19:09:39 +00:00
dm-io.c	dm io: fix discard support	2012-03-07 19:09:37 +00:00
dm-ioctl.c	dm ioctl: do not leak argv if target message only contains whitespace	2012-03-07 19:09:34 +00:00
dm-kcopyd.c	dm kcopyd: add dm_kcopyd_zero to zero an area	2011-10-31 20:18:58 +00:00
dm-linear.c	dm: do not forward ioctls from logical volumes to the underlying device	2012-01-14 15:07:24 -08:00
dm-log-userspace-base.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
dm-log-userspace-transfer.c	netlink: kill eff_cap from struct netlink_skb_parms	2011-03-03 13:32:07 -08:00
dm-log-userspace-transfer.h
dm-log.c	dm: use vzalloc	2011-08-02 12:32:02 +01:00
dm-mpath.c	dm: do not forward ioctls from logical volumes to the underlying device	2012-01-14 15:07:24 -08:00
dm-mpath.h
dm-path-selector.c	md: Add module.h to all files using it implicitly	2011-10-31 19:31:18 -04:00
dm-path-selector.h
dm-queue-length.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
dm-raid1.c	dm kcopyd: return client directly and not through a pointer	2011-05-29 13:03:13 +01:00
dm-raid.c	dm raid: fix flush support	2012-03-07 19:09:48 +00:00
dm-region-hash.c	Fix common misspellings	2011-03-31 11:26:23 -03:00
dm-round-robin.c	md: Add module.h to all files using it implicitly	2011-10-31 19:31:18 -04:00
dm-service-time.c	md: Add module.h to all files using it implicitly	2011-10-31 19:31:18 -04:00
dm-snap-persistent.c	md: Add in export.h for files using EXPORT_SYMBOL	2011-10-31 19:31:19 -04:00
dm-snap-transient.c	md: Add in export.h for files using EXPORT_SYMBOL	2011-10-31 19:31:19 -04:00
dm-snap.c	dm snapshot: skip reading origin when overwriting complete chunk	2011-08-02 12:32:04 +01:00
dm-stripe.c	dm stripe: implement merge method	2011-03-24 13:54:35 +00:00
dm-sysfs.c
dm-table.c	block: Introduce blk_set_stacking_limits function	2012-01-11 16:27:11 +01:00
dm-target.c
dm-thin-metadata.c	dm thin metadata: decrement counter after removing mapped block	2012-03-07 19:09:44 +00:00
dm-thin-metadata.h	dm: add thin provisioning target	2011-10-31 20:21:18 +00:00
dm-thin.c	dm: add thin provisioning target	2011-10-31 20:21:18 +00:00
dm-uevent.c	md: Add in export.h for files using EXPORT_SYMBOL	2011-10-31 19:31:19 -04:00
dm-uevent.h
dm-zero.c
dm.c	fs: move code out of buffer.c	2012-01-03 22:54:07 -05:00
dm.h	dm table: add immutable feature	2011-10-31 20:19:04 +00:00
faulty.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
Kconfig	dm: add thin provisioning target	2011-10-31 20:21:18 +00:00
linear.c	md/linear: fix hot-add of devices to linear arrays.	2011-12-23 09:56:55 +11:00
linear.h	md/linear: typedef removal: linear_conf_t -> struct linear_conf	2011-10-11 16:48:54 +11:00
Makefile	dm: add thin provisioning target	2011-10-31 20:21:18 +00:00
md.c	md: don't set md arrays to readonly on shutdown.	2012-03-19 12:46:37 +11:00
md.h	md: create externally visible flags for supporting hot-replace.	2011-12-23 10:17:51 +11:00
multipath.c	md: change hot_remove_disk to take an rdev rather than a number.	2011-12-23 10:17:51 +11:00
multipath.h	md/multipath: typedef removal: multipath_conf_t -> struct mpconf	2011-10-11 16:48:57 +11:00
raid0.c	Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux	2011-11-06 19:44:47 -08:00
raid0.h	md/raid0: typedef removal: raid0_conf_t -> struct r0conf	2011-10-11 16:48:59 +11:00
raid1.c	md/raid1,raid10: avoid deadlock during resync/recovery.	2012-03-19 12:46:38 +11:00
raid1.h	md/raid1: Allocate spare to store replacement devices and their bios.	2011-12-23 10:17:56 +11:00
raid5.c	md: allow re-add to failed arrays.	2012-03-19 12:46:37 +11:00
raid5.h	md/raid5: detect and handle replacements during recovery.	2011-12-23 10:17:53 +11:00
raid10.c	md/raid1,raid10: avoid deadlock during resync/recovery.	2012-03-19 12:46:38 +11:00
raid10.h	md/raid10: prepare data structures for handling replacement.	2011-12-23 10:17:54 +11:00