NeilBrown 26ac107378 md/raid5: Fix livelock when array is both resyncing and degraded. ...

Commit a7854487cd:
  md: When RAID5 is dirty, force reconstruct-write instead of read-modify-write.

Causes an RCW cycle to be forced even when the array is degraded.
A degraded array cannot support RCW as that requires reading all data
blocks, and one may be missing.

Forcing an RCW when it is not possible causes a live-lock and the code
spins, repeatedly deciding to do something that cannot succeed.

So change the condition to only force RCW on non-degraded arrays.

Reported-by: Manibalan P <pmanibalan@amiindia.co.in>
Bisected-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Tested-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Fixes: a7854487cd
Cc: stable@vger.kernel.org (v3.7+)

2015-02-18 11:35:14 +11:00

..

bcache

md/bcache: use generic io stats accounting functions to simplify io stat accounting

2014-11-24 08:05:12 -07:00

persistent-data

dm space map metadata: fix sm_bootstrap_get_count()

2014-12-02 10:25:06 -05:00

bitmap.c

md: remove mddev_lock() from md_attr_show()

2015-02-06 09:32:55 +11:00

bitmap.h

kernfs: s/sysfs_dirent/kernfs_node/ and rename its friends accordingly

2013-12-11 15:28:36 -08:00

dm-bio-prison.c

dm bio prison: introduce support for locking ranges of blocks

2014-11-10 15:25:30 -05:00

dm-bio-prison.h

dm bio prison: introduce support for locking ranges of blocks

2014-11-10 15:25:30 -05:00

dm-bio-record.h

dm: Refactor for new bio cloning/splitting

2013-11-23 22:33:55 -08:00

dm-bufio.c

Merge tag 'dm-3.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

2014-12-08 21:10:03 -08:00

dm-bufio.h

dm snapshot: use dm-bufio prefetch

2014-01-14 23:23:03 -05:00

dm-builtin.c

dm sysfs: fix a module unload race

2014-01-14 23:23:04 -05:00

dm-cache-block-types.h

dm cache: revert "remove remainder of distinct discard block size"

2014-11-10 15:25:30 -05:00

dm-cache-metadata.c

dm cache: share cache-metadata object across inactive and active DM tables

2015-01-23 10:57:15 -05:00

dm-cache-metadata.h

dm cache: revert "remove remainder of distinct discard block size"

2014-11-10 15:25:30 -05:00

dm-cache-policy-cleaner.c

…

dm-cache-policy-internal.h

dm cache: add remove_cblock method to policy interface

2013-11-11 11:37:50 -05:00

dm-cache-policy-mq.c

dm cache policy mq: simplify ability to promote sequential IO to the cache

2014-11-10 15:25:30 -05:00

dm-cache-policy.c

dm cache: add policy name to status output

2014-01-16 13:44:11 -05:00

dm-cache-policy.h

dm cache: add policy name to status output

2014-01-16 13:44:11 -05:00

dm-cache-target.c

dm cache: fix problematic dual use of a single migration count variable

2015-01-23 11:06:08 -05:00

dm-crypt.c

Merge tag 'dm-3.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

2014-12-08 21:10:03 -08:00

dm-delay.c

Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block

2014-01-30 11:19:05 -08:00

dm-era-target.c

dm era: check for a non-NULL metadata object before closing it

2014-06-03 13:44:08 -04:00

dm-exception-store.c

…

dm-exception-store.h

…

dm-flakey.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

dm-io.c

dm io: simplify dec_count and sync_io

2014-08-01 12:30:30 -04:00

dm-ioctl.c

dm: enhance internal suspend and resume interface

2014-11-19 12:31:17 -05:00

dm-kcopyd.c

…

dm-linear.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

dm-log-userspace-base.c

dm log userspace: allow mark requests to piggyback on flush requests

2014-01-21 23:46:27 -05:00

dm-log-userspace-transfer.c

dm log userspace: fix memory leak in dm_ulog_tfr_init failure path

2014-10-05 20:03:38 -04:00

dm-log-userspace-transfer.h

…

dm-log.c

…

dm-mpath.c

dm mpath: stop queueing IO when no valid paths exist

2014-10-05 20:03:35 -04:00

dm-mpath.h

…

dm-path-selector.c

…

dm-path-selector.h

…

dm-queue-length.c

…

dm-raid1.c

dm raid1: fix immutable biovec related BUG when retrying read bio

2014-02-18 10:48:57 -05:00

dm-raid.c

md: make ->congested robust against personality changes.

2015-02-04 08:35:52 +11:00

dm-region-hash.c

block: Abstract out bvec iterator

2013-11-23 22:33:47 -08:00

dm-round-robin.c

…

dm-service-time.c

…

dm-snap-persistent.c

dm snapshot: fix metadata corruption

2014-03-03 17:58:13 -05:00

dm-snap-transient.c

…

dm-snap.c

sched: Remove proliferation of wait_on_bit() action functions

2014-07-16 15:10:39 +02:00

dm-stats.c

Merge tag 'dm-3.19-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

2014-12-08 21:10:03 -08:00

dm-stats.h

dm: add statistics support

2013-09-05 20:46:06 -04:00

dm-stripe.c

dm stripe: fix potential for leak in stripe_ctr error path

2014-10-10 22:05:18 -04:00

dm-switch.c

dm switch: efficiently support repetitive patterns

2014-08-01 12:30:37 -04:00

dm-sysfs.c

dm sysfs: fix a module unload race

2014-01-14 23:23:04 -05:00

dm-table.c

dm: add presuspend_undo hook to target_type

2014-11-19 11:24:59 -05:00

dm-target.c

…

dm-thin-metadata.c

dm thin: prefetch missing metadata pages

2014-11-10 15:25:27 -05:00

dm-thin-metadata.h

dm thin: prefetch missing metadata pages

2014-11-10 15:25:27 -05:00

dm-thin.c

dm thin: fix crash by initializing thin device's refcount and completion earlier

2014-12-17 12:06:25 -05:00

dm-uevent.c

…

dm-uevent.h

…

dm-verity.c

dm verity: fix biovecs hash calculation regression

2014-04-15 12:19:24 -04:00

dm-zero.c

dm crypt, dm zero: update author name following legal name change

2014-07-10 16:44:14 -04:00

dm.c

dm: fix handling of multiple internal suspends

2015-01-24 14:50:08 -05:00

dm.h

dm: enhance internal suspend and resume interface

2014-11-19 12:31:17 -05:00

faulty.c

md: rename ->stop to ->free

2015-02-04 08:35:52 +11:00

Kconfig

dm: add era target

2014-03-27 16:56:23 -04:00

linear.c

md: rename ->stop to ->free

2015-02-04 08:35:52 +11:00

linear.h

…

Makefile

dm: add era target

2014-03-27 16:56:23 -04:00

md.c

md: make reconfig_mutex optional for writes to md sysfs files.

2015-02-06 09:32:56 +11:00

md.h

md: wakeup thread upon rdev_dec_pending()

2015-02-06 09:32:57 +11:00

multipath.c

md: rename ->stop to ->free

2015-02-04 08:35:52 +11:00

multipath.h

…

raid0.c

md: rename ->stop to ->free

2015-02-04 08:35:52 +11:00

raid0.h

…

raid1.c

md/raid1: round up to bdev_logical_block_size in narrow_write_error

2015-02-16 14:49:26 +11:00

raid1.h

md: make ->congested robust against personality changes.

2015-02-04 08:35:52 +11:00

raid5.c

md/raid5: Fix livelock when array is both resyncing and degraded.

2015-02-18 11:35:14 +11:00

raid5.h

md: make ->congested robust against personality changes.

2015-02-04 08:35:52 +11:00

raid10.c

md/raid10: round up to bdev_logical_block_size in narrow_write_error.

2015-02-16 14:51:54 +11:00

raid10.h

md: make ->congested robust against personality changes.

2015-02-04 08:35:52 +11:00