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8b48ec23cc
linux/drivers/md
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Guoqing Jiang 8b48ec23cc md: don't unregister sync_thread with reconfig_mutex held 
Unregister sync_thread doesn't need to hold reconfig_mutex since it
doesn't reconfigure array.

And it could cause deadlock problem for raid5 as follows:

1. process A tried to reap sync thread with reconfig_mutex held after echo
   idle to sync_action.
2. raid5 sync thread was blocked if there were too many active stripes.
3. SB_CHANGE_PENDING was set (because of write IO comes from upper layer)
   which causes the number of active stripes can't be decreased.
4. SB_CHANGE_PENDING can't be cleared since md_check_recovery was not able
   to hold reconfig_mutex.

More details in the link:
https://lore.kernel.org/linux-raid/5ed54ffc-ce82-bf66-4eff-390cb23bc1ac@molgen.mpg.de/T/#t

And add one parameter to md_reap_sync_thread since it could be called by
dm-raid which doesn't hold reconfig_mutex.

Reported-and-tested-by: Donald Buczek <buczek@molgen.mpg.de>
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Song Liu <song@kernel.org>
2022-05-22 23:07:21 -07:00
..
bcache block: decouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD 2022-04-17 19:49:59 -06:00
persistent-data dm space map common: add bounds check to sm_ll_lookup_bitmap() 2022-01-04 13:58:19 -05:00
dm-audit.c dm: introduce audit event module for device mapper 2021-10-27 16:53:47 -04:00
dm-audit.h dm: introduce audit event module for device mapper 2021-10-27 16:53:47 -04:00
dm-bio-prison-v1.c
dm-bio-prison-v1.h
dm-bio-prison-v2.c
dm-bio-prison-v2.h
dm-bio-record.h block: move integrity handling out of <linux/blkdev.h> 2021-10-18 06:17:02 -06:00
dm-bufio.c block: turn bio_kmalloc into a simple kmalloc wrapper 2022-04-17 19:30:41 -06:00
dm-builtin.c
dm-cache-background-tracker.c
dm-cache-background-tracker.h
dm-cache-block-types.h
dm-cache-metadata.c dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them 2021-10-18 14:43:22 -06:00
dm-cache-metadata.h
dm-cache-policy-internal.h
dm-cache-policy-smq.c dm cache policy smq: make static read-only array table const 2022-02-22 10:35:53 -05:00
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c block: remove QUEUE_FLAG_DISCARD 2022-04-17 19:49:59 -06:00
dm-clone-metadata.c
dm-clone-metadata.h
dm-clone-target.c block: remove QUEUE_FLAG_DISCARD 2022-04-17 19:49:59 -06:00
dm-core.h dm: fix dm_io and dm_target_io flags race condition on Alpha 2022-04-01 13:19:27 -04:00
dm-crypt.c SCSI misc on 20220324 2022-03-24 19:37:53 -07:00
dm-delay.c dm: simplify dm_sumbit_bio_remap interface 2022-03-10 13:44:56 -05:00
dm-dust.c dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them 2021-10-18 14:43:22 -06:00
dm-ebs-target.c scsi: dm: Remove WRITE_SAME support 2022-02-22 21:11:08 -05:00
dm-era-target.c dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them 2021-10-18 14:43:22 -06:00
dm-exception-store.c
dm-exception-store.h dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them 2021-10-18 14:43:22 -06:00
dm-flakey.c dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them 2021-10-18 14:43:22 -06:00
dm-ima.c dm ima: fix wrong length calculation for no_data string 2022-02-22 10:42:41 -05:00
dm-ima.h dm ima: add version info to dm related events in ima log 2021-08-20 15:59:47 -04:00
dm-init.c
dm-integrity.c dm integrity: fix memory corruption when tag_size is less than digest size 2022-04-13 12:38:49 -04:00
dm-io-tracker.h dm writecache: make writeback pause configurable 2021-06-28 16:30:13 -04:00
dm-io.c block: add a bdev_max_discard_sectors helper 2022-04-17 19:49:59 -06:00
dm-ioctl.c dm ioctl: log an error if the ioctl structure is corrupted 2022-04-01 10:29:43 -04:00
dm-kcopyd.c
dm-linear.c scsi: dm: Remove WRITE_SAME support 2022-02-22 21:11:08 -05:00
dm-log-userspace-base.c dm: update target status functions to support IMA measurement 2021-08-10 13:34:23 -04:00
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c block: remove QUEUE_FLAG_DISCARD 2022-04-17 19:49:59 -06:00
dm-log.c dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them 2021-10-18 14:43:22 -06:00
dm-mpath.c SCSI misc on 20220324 2022-03-24 19:37:53 -07:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-ps-historical-service-time.c dm mpath: only use ktime_get_ns() in historical selector 2022-04-13 13:22:16 -04:00
dm-ps-io-affinity.c dm: update target status functions to support IMA measurement 2021-08-10 13:34:23 -04:00
dm-ps-queue-length.c dm: update target status functions to support IMA measurement 2021-08-10 13:34:23 -04:00
dm-ps-round-robin.c dm: update target status functions to support IMA measurement 2021-08-10 13:34:23 -04:00
dm-ps-service-time.c dm: update target status functions to support IMA measurement 2021-08-10 13:34:23 -04:00
dm-raid1.c dm: update target status functions to support IMA measurement 2021-08-10 13:34:23 -04:00
dm-raid.c md: don't unregister sync_thread with reconfig_mutex held 2022-05-22 23:07:21 -07:00
dm-region-hash.c
dm-rq.c SCSI misc on 20220324 2022-03-24 19:37:53 -07:00
dm-rq.h
dm-snap-persistent.c dm: update target status functions to support IMA measurement 2021-08-10 13:34:23 -04:00
dm-snap-transient.c dm: update target status functions to support IMA measurement 2021-08-10 13:34:23 -04:00
dm-snap.c dm-snap: use blkdev_issue_flush instead of open coding it 2022-02-02 07:49:59 -07:00
dm-stats.c dm stats: fix too short end duration_ns when using precise_timestamps 2022-02-21 15:35:39 -05:00
dm-stats.h dm stats: fix too short end duration_ns when using precise_timestamps 2022-02-21 15:35:39 -05:00
dm-stripe.c scsi: dm: Remove WRITE_SAME support 2022-02-22 21:11:08 -05:00
dm-switch.c dm: use bdev_nr_sectors and bdev_nr_bytes instead of open coding them 2021-10-18 14:43:22 -06:00
dm-sysfs.c dm sysfs: use default_groups in kobj_type 2022-01-06 09:48:55 -05:00
dm-table.c block: decouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD 2022-04-17 19:49:59 -06:00
dm-target.c
dm-thin-metadata.c dm thin metadata: remove unused dm_thin_remove_block and __remove 2022-02-22 13:55:50 -05:00
dm-thin-metadata.h dm thin metadata: remove unused dm_thin_remove_block and __remove 2022-02-22 13:55:50 -05:00
dm-thin.c block: decouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD 2022-04-17 19:49:59 -06:00
dm-uevent.c
dm-uevent.h
dm-unstripe.c dm: update target status functions to support IMA measurement 2021-08-10 13:34:23 -04:00
dm-verity-fec.c
dm-verity-fec.h
dm-verity-target.c - Add DM core support for emitting audit events through the audit 2021-11-09 11:02:04 -08:00
dm-verity-verify-sig.c
dm-verity-verify-sig.h
dm-verity.h
dm-writecache.c block: pass a block_device and opf to bio_alloc_bioset 2022-02-02 07:49:59 -07:00
dm-zero.c
dm-zone.c dm zone: fix NULL pointer dereference in dm_zone_map_bio 2022-04-13 13:22:17 -04:00
dm-zoned-metadata.c dm-zoned: remove the ->name field in struct dmz_dev 2022-03-02 12:15:35 -05:00
dm-zoned-reclaim.c
dm-zoned-target.c dm-zoned: don't set the discard_alignment queue limit 2022-05-03 10:38:50 -06:00
dm-zoned.h dm-zoned: remove the ->name field in struct dmz_dev 2022-03-02 12:15:35 -05:00
dm.c block: remove QUEUE_FLAG_DISCARD 2022-04-17 19:49:59 -06:00
dm.h dax: remove dax_capable 2021-12-04 08:58:51 -08:00
Kconfig blk-mq: make the blk-mq stacking code optional 2022-02-16 19:39:09 -07:00
Makefile dm: introduce audit event module for device mapper 2021-10-27 16:53:47 -04:00
md-autodetect.c
md-bitmap.c md: replace deprecated strlcpy & remove duplicated line 2022-04-25 14:00:36 -07:00
md-bitmap.h
md-cluster.c md: replace deprecated strlcpy & remove duplicated line 2022-04-25 14:00:36 -07:00
md-cluster.h
md-faulty.c block: pass a block_device to bio_clone_fast 2022-02-04 07:43:18 -07:00
md-linear.c block: remove QUEUE_FLAG_DISCARD 2022-04-17 19:49:59 -06:00
md-linear.h
md-multipath.c SCSI misc on 20220324 2022-03-24 19:37:53 -07:00
md-multipath.h
md.c md: don't unregister sync_thread with reconfig_mutex held 2022-05-22 23:07:21 -07:00
md.h md: don't unregister sync_thread with reconfig_mutex held 2022-05-22 23:07:21 -07:00
raid0.c md/raid0: Ignore RAID0 layout if the second zone has only one device 2022-04-25 14:00:37 -07:00
raid0.h
raid1-10.c md: raid1/raid10: drop pending_cnt 2022-03-08 15:16:54 -08:00
raid1.c md: Set MD_BROKEN for RAID1 and RAID10 2022-04-25 14:00:34 -07:00
raid1.h md: raid1/raid10: drop pending_cnt 2022-03-08 15:16:54 -08:00
raid5-cache.c block: decouple REQ_OP_SECURE_ERASE from REQ_OP_DISCARD 2022-04-17 19:49:59 -06:00
raid5-log.h
raid5-ppl.c md/raid5-ppl: Annotate with rcu_dereference_protected() 2022-04-25 14:00:37 -07:00
raid5.c raid5: don't set the discard_alignment queue limit 2022-05-03 10:38:50 -06:00
raid5.h md/raid5: Add __rcu annotation to struct disk_info 2022-04-25 14:00:36 -07:00
raid10.c md: Set MD_BROKEN for RAID1 and RAID10 2022-04-25 14:00:34 -07:00
raid10.h md: raid1/raid10: drop pending_cnt 2022-03-08 15:16:54 -08:00