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Guoqing Jiang 41a9504112 md-cluster: release RESYNC lock after the last resync message 
All the RESYNC messages are sent with resync lock held, the only
exception is resync_finish which releases resync_lockres before
send the last resync message, this should be changed as well.
Otherwise, we can see deadlock issue as follows:

clustermd2-gqjiang2:~ # cat /proc/mdstat
Personalities : [raid10] [raid1]
md0 : active raid1 sdg[0] sdf[1]
      134144 blocks super 1.2 [2/2] [UU]
      [===================>.]  resync = 99.6% (134144/134144) finish=0.0min speed=26K/sec
      bitmap: 1/1 pages [4KB], 65536KB chunk

unused devices: <none>
clustermd2-gqjiang2:~ # ps aux|grep md|grep D
root     20497  0.0  0.0      0     0 ?        D    16:00   0:00 [md0_raid1]
clustermd2-gqjiang2:~ # cat /proc/20497/stack
[<ffffffffc05ff51e>] dlm_lock_sync+0x8e/0xc0 [md_cluster]
[<ffffffffc05ff7e8>] __sendmsg+0x98/0x130 [md_cluster]
[<ffffffffc05ff900>] sendmsg+0x20/0x30 [md_cluster]
[<ffffffffc05ffc35>] resync_info_update+0xb5/0xc0 [md_cluster]
[<ffffffffc0593e84>] md_reap_sync_thread+0x134/0x170 [md_mod]
[<ffffffffc059514c>] md_check_recovery+0x28c/0x510 [md_mod]
[<ffffffffc060c882>] raid1d+0x42/0x800 [raid1]
[<ffffffffc058ab61>] md_thread+0x121/0x150 [md_mod]
[<ffffffff9a0a5b3f>] kthread+0xff/0x140
[<ffffffff9a800235>] ret_from_fork+0x35/0x40
[<ffffffffffffffff>] 0xffffffffffffffff

clustermd-gqjiang1:~ # ps aux|grep md|grep D
root     20531  0.0  0.0      0     0 ?        D    16:00   0:00 [md0_raid1]
root     20537  0.0  0.0      0     0 ?        D    16:00   0:00 [md0_cluster_rec]
root     20676  0.0  0.0      0     0 ?        D    16:01   0:00 [md0_resync]
clustermd-gqjiang1:~ # cat /proc/mdstat
Personalities : [raid10] [raid1]
md0 : active raid1 sdf[1] sdg[0]
      134144 blocks super 1.2 [2/2] [UU]
      [===================>.]  resync = 97.3% (131072/134144) finish=8076.8min speed=0K/sec
      bitmap: 1/1 pages [4KB], 65536KB chunk

unused devices: <none>
clustermd-gqjiang1:~ # cat /proc/20531/stack
[<ffffffffc080974d>] metadata_update_start+0xcd/0xd0 [md_cluster]
[<ffffffffc079c897>] md_update_sb.part.61+0x97/0x820 [md_mod]
[<ffffffffc079f15b>] md_check_recovery+0x29b/0x510 [md_mod]
[<ffffffffc0816882>] raid1d+0x42/0x800 [raid1]
[<ffffffffc0794b61>] md_thread+0x121/0x150 [md_mod]
[<ffffffff9e0a5b3f>] kthread+0xff/0x140
[<ffffffff9e800235>] ret_from_fork+0x35/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
clustermd-gqjiang1:~ # cat /proc/20537/stack
[<ffffffffc0813222>] freeze_array+0xf2/0x140 [raid1]
[<ffffffffc080a56e>] recv_daemon+0x41e/0x580 [md_cluster]
[<ffffffffc0794b61>] md_thread+0x121/0x150 [md_mod]
[<ffffffff9e0a5b3f>] kthread+0xff/0x140
[<ffffffff9e800235>] ret_from_fork+0x35/0x40
[<ffffffffffffffff>] 0xffffffffffffffff
clustermd-gqjiang1:~ # cat /proc/20676/stack
[<ffffffffc080951e>] dlm_lock_sync+0x8e/0xc0 [md_cluster]
[<ffffffffc080957f>] lock_token+0x2f/0xa0 [md_cluster]
[<ffffffffc0809622>] lock_comm+0x32/0x90 [md_cluster]
[<ffffffffc08098f5>] sendmsg+0x15/0x30 [md_cluster]
[<ffffffffc0809c0a>] resync_info_update+0x8a/0xc0 [md_cluster]
[<ffffffffc08130ba>] raid1_sync_request+0xa9a/0xb10 [raid1]
[<ffffffffc079b8ea>] md_do_sync+0xbaa/0xf90 [md_mod]
[<ffffffffc0794b61>] md_thread+0x121/0x150 [md_mod]
[<ffffffff9e0a5b3f>] kthread+0xff/0x140
[<ffffffff9e800235>] ret_from_fork+0x35/0x40
[<ffffffffffffffff>] 0xffffffffffffffff

Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
2018-08-31 17:38:10 -07:00
..
bcache
bcache: release dc->writeback_lock properly in bch_writeback_thread()
2018-08-22 15:06:29 -06:00
persistent-data
dm: Avoid namespace collision with bitmap API
2018-08-01 15:49:38 -07:00
dm-bio-prison-v1.c
dm: adjust structure members to improve alignment
2018-06-08 11:53:14 -04:00
dm-bio-prison-v1.h
block: switch bios to blk_status_t
2017-06-09 09:27:32 -06:00
dm-bio-prison-v2.c
dm: adjust structure members to improve alignment
2018-06-08 11:53:14 -04:00
dm-bio-prison-v2.h
dm bio prison v2: new interface for the bio prison
2017-03-07 11:30:16 -05:00
dm-bio-record.h
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
dm-bufio.c
dm bufio: fix buffer alignment
2018-04-30 11:51:39 -04:00
dm-builtin.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dm-cache-background-tracker.c
dm cache background tracker: fix sparse warning
2018-04-30 15:40:40 -04:00
dm-cache-background-tracker.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-block-types.h
linux: drop __bitwise__ everywhere
2016-12-16 00:13:41 +02:00
dm-cache-metadata.c
dm cache metadata: set dirty on all cache blocks after a crash
2018-08-09 12:14:32 -04:00
dm-cache-metadata.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-policy-internal.h
dm cache: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-policy-smq.c
treewide: Use array_size() in vzalloc()
2018-06-12 16:19:22 -07:00
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: significant rework to leverage dm-bio-prison-v2
2017-03-07 13:28:31 -05:00
dm-cache-target.c
dm kcopyd: return void from dm_kcopyd_copy()
2018-07-31 17:33:21 -04:00
dm-core.h
dm: adjust structure members to improve alignment
2018-06-08 11:53:14 -04:00
dm-crypt.c
dm crypt: don't decrease device limits
2018-08-13 15:28:41 -04:00
dm-delay.c
dm delay: add flush as a third class of IO
2018-07-27 15:24:19 -04:00
dm-era-target.c
dm: allow targets to return output from messages they are sent
2018-04-03 15:04:10 -04:00
dm-exception-store.c
- Revert a dm-multipath change that caused a regression for unprivledged
2015-11-04 21:19:53 -08:00
dm-exception-store.h
dm snapshot: fix hung bios when copy error occurs
2016-01-08 20:03:05 -05:00
dm-flakey.c
dm: remove fmode_t argument from .prepare_ioctl hook
2018-04-04 12:12:39 -04:00
dm-integrity.c
dm integrity: recalculate checksums on creation
2018-07-27 15:24:27 -04:00
dm-io.c
dm: Use kzalloc for all structs with embedded biosets/mempools
2018-06-05 08:47:43 -06:00
dm-ioctl.c
dm: report which conflicting type caused error during table_load()
2018-06-08 09:50:15 -04:00
dm-kcopyd.c
dm kcopyd: avoid softlockup in run_complete_job
2018-08-08 09:16:24 -04:00
dm-linear.c
dax: Introduce a ->copy_to_iter dax operation
2018-05-22 23:18:31 -07:00
dm-log-userspace-base.c
dm: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00
dm-log-userspace-transfer.c
dm log userspace transfer: match wait_for_completion_timeout return type
2015-04-15 12:10:20 -04:00
dm-log-userspace-transfer.h
…
dm-log-writes.c
dax: Introduce a ->copy_to_iter dax operation
2018-05-22 23:18:31 -07:00
dm-log.c
block,fs: use REQ_* flags directly
2016-11-01 09:43:26 -06:00
dm-mpath.c
block: sanitize blk_get_request calling conventions
2018-05-14 08:55:12 -06:00
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 path selector: remove 'repeat_count' return from .select_path hook
2016-02-22 22:34:42 -05:00
dm-queue-length.c
dm mpath selector: more evenly distribute ties
2018-01-29 13:44:58 -05:00
dm-raid1.c
dm kcopyd: return void from dm_kcopyd_copy()
2018-07-31 17:33:21 -04:00
dm-raid.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-08-18 16:48:07 -07:00
dm-region-hash.c
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
dm-round-robin.c
dm round robin: revert "use percpu 'repeat_count' and 'current_path'"
2017-02-17 00:54:09 -05:00
dm-rq.c
dm: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00
dm-rq.h
dm rq: do not update rq partially in each ending bio
2017-08-28 10:23:28 -04:00
dm-service-time.c
dm mpath selector: more evenly distribute ties
2018-01-29 13:44:58 -05:00
dm-snap-persistent.c
dm bufio: move dm-bufio.h to include/linux/
2018-04-03 15:04:23 -04:00
dm-snap-transient.c
dm snapshot: fix hung bios when copy error occurs
2016-01-08 20:03:05 -05:00
dm-snap.c
dm snapshot: remove stale FIXME in snapshot_map()
2018-08-08 20:50:58 -04:00
dm-stats.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
dm-stats.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dm-stripe.c
dax: Introduce a ->copy_to_iter dax operation
2018-05-22 23:18:31 -07:00
dm-switch.c
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
dm-sysfs.c
dm: move request-based code out to dm-rq.[hc]
2016-06-10 15:15:44 -04:00
dm-table.c
dm: prevent DAX mounts if not supported
2018-06-28 16:06:14 -04:00
dm-target.c
dm: remove unused macro DM_MOD_NAME_SIZE
2018-04-03 15:04:15 -04:00
dm-thin-metadata.c
dm thin metadata: remove needless work from __commit_transaction
2018-06-22 14:51:11 -04:00
dm-thin-metadata.h
dm thin: fix a race condition between discarding and provisioning a block
2016-07-20 12:43:35 -04:00
dm-thin.c
dm thin: stop no_space_timeout worker when switching to write-mode
2018-08-07 14:30:29 -04:00
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-unstripe.c
dm unstripe: remove unnecessary header includes
2018-04-03 15:04:15 -04:00
dm-verity-fec.c
Refactors rslib and callers to provide a per-instance allocation area
2018-06-05 10:48:05 -07:00
dm-verity-fec.h
dm: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00
dm-verity-target.c
treewide: kvzalloc() -> kvcalloc()
2018-06-12 16:19:22 -07:00
dm-verity.h
dm verity: add 'check_at_most_once' option to only validate hashes once
2018-04-03 15:04:29 -04:00
dm-writecache.c
libnvdimm-for-4.19_misc
2018-08-25 18:13:10 -07:00
dm-zero.c
dm: don't return errnos from ->map
2017-06-09 09:27:32 -06:00
dm-zoned-metadata.c
dm: backfill missing calls to mutex_destroy()
2018-01-17 09:16:15 -05:00
dm-zoned-reclaim.c
dm kcopyd: return void from dm_kcopyd_copy()
2018-07-31 17:33:21 -04:00
dm-zoned-target.c
dm zoned: avoid triggering reclaim from inside dmz_map()
2018-06-22 14:51:12 -04:00
dm-zoned.h
dm zoned: drive-managed zoned block device target
2017-06-19 11:05:20 -04:00
dm.c
block: Add and use op_stat_group() for indexing disk_stat fields.
2018-07-18 08:44:20 -06:00
dm.h
dm: move dm_table_destroy() to same header as dm_table_create()
2018-01-17 09:16:06 -05:00
Kconfig
dm: add writecache target
2018-06-08 11:59:51 -04:00
Makefile
dm: add writecache target
2018-06-08 11:59:51 -04:00
md-bitmap.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-08-18 16:48:07 -07:00
md-bitmap.h
md: Avoid namespace collision with bitmap API
2018-08-01 15:49:39 -07:00
md-cluster.c
md-cluster: release RESYNC lock after the last resync message
2018-08-31 17:38:10 -07:00
md-cluster.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
md-faulty.c
md: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00
md-linear.c
md: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00
md-linear.h
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2017-11-14 16:07:26 -08:00
md-multipath.c
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
md-multipath.h
md: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00
md.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-08-18 16:48:07 -07:00
md.h
md-cluster: show array's status more accurate
2018-07-05 11:17:01 -07:00
raid0.c
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
raid0.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raid1-10.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raid1.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-08-18 16:48:07 -07:00
raid1.h
md: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00
raid5-cache.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2018-08-18 16:48:07 -07:00
raid5-log.h
md/raid5-cache: disable reshape completely
2018-08-31 17:38:09 -07:00
raid5-ppl.c
md: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00
raid5.c
md/raid5-cache: disable reshape completely
2018-08-31 17:38:09 -07:00
raid5.h
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2018-06-09 12:01:36 -07:00
raid10.c
RAID10 BUG_ON in raise_barrier when force is true and conf->barrier is 0
2018-08-31 17:38:10 -07:00
raid10.h
md: convert to bioset_init()/mempool_init()
2018-05-30 15:33:32 -06:00