Guoju Fang 4de642e680 bcache: fix a lost wake-up problem caused by mca_cannibalize_lock ... [ Upstream commit 34cf78bf34 ] This patch fix a lost wake-up problem caused by the race between mca_cannibalize_lock and bch_cannibalize_unlock. Consider two processes, A and B. Process A is executing mca_cannibalize_lock, while process B takes c->btree_cache_alloc_lock and is executing bch_cannibalize_unlock. The problem happens that after process A executes cmpxchg and will execute prepare_to_wait. In this timeslice process B executes wake_up, but after that process A executes prepare_to_wait and set the state to TASK_INTERRUPTIBLE. Then process A goes to sleep but no one will wake up it. This problem may cause bcache device to dead. Signed-off-by: Guoju Fang <fangguoju@gmail.com> Signed-off-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org>		2020-10-01 13:12:29 +02:00
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bcache	bcache: fix a lost wake-up problem caused by mca_cannibalize_lock	2020-10-01 13:12:29 +02:00
persistent-data	dm space map common: fix to ensure new block isn't already in use	2020-02-14 16:32:13 -05:00
bitmap.c	md: Avoid namespace collision with bitmap API	2020-01-29 15:02:39 +01:00
bitmap.h	md: Avoid namespace collision with bitmap API	2020-01-29 15:02:39 +01:00
dm-bio-prison-v1.c	dm: Use kzalloc for all structs with embedded biosets/mempools	2019-11-06 12:42:52 +01:00
dm-bio-prison-v1.h
dm-bio-prison-v2.c	dm: Use kzalloc for all structs with embedded biosets/mempools	2019-11-06 12:42:52 +01:00
dm-bio-prison-v2.h
dm-bio-record.h	dm bio record: save/restore bi_end_io and bi_integrity	2020-04-02 16:34:14 +02:00
dm-bufio.c	Revert "dm bufio: fix deadlock with loop device"	2019-08-29 08:26:42 +02:00
dm-bufio.h
dm-builtin.c
dm-cache-background-tracker.c
dm-cache-background-tracker.h
dm-cache-block-types.h
dm-cache-metadata.c	dm cache metadata: Avoid returning cmd->bm wild pointer on error	2020-09-09 19:03:12 +02:00
dm-cache-metadata.h
dm-cache-policy-internal.h
dm-cache-policy-smq.c
dm-cache-policy.c
dm-cache-policy.h
dm-cache-target.c	dm cache: remove all obsolete writethrough-specific code	2020-08-21 09:48:24 +02:00
dm-core.h
dm-crypt.c	dm crypt: avoid truncating the logical block size	2020-06-20 10:25:19 +02:00
dm-delay.c	dm delay: fix a crash when invalid device is specified	2019-05-25 18:25:33 +02:00
dm-era-target.c
dm-exception-store.c
dm-exception-store.h
dm-flakey.c	dm flakey: check for null arg_name in parse_features()	2020-04-24 08:00:57 +02:00
dm-integrity.c	dm integrity: fix a deadlock due to offloading to an incorrect workqueue	2020-03-11 18:03:08 +01:00
dm-io.c	dm: Use kzalloc for all structs with embedded biosets/mempools	2019-11-06 12:42:52 +01:00
dm-ioctl.c	dm ioctl: harden copy_params()'s copy_from_user() from malicious users	2018-11-13 11:15:10 -08:00
dm-kcopyd.c	dm: Use kzalloc for all structs with embedded biosets/mempools	2019-11-06 12:42:52 +01:00
dm-linear.c	dm linear: fix linear_end_io conditional definition	2018-10-18 09:16:24 +02:00
dm-log-userspace-base.c
dm-log-userspace-transfer.c
dm-log-userspace-transfer.h
dm-log-writes.c	dm log writes: make sure super sector log updates are written in order	2019-07-03 13:16:00 +02:00
dm-log.c
dm-mpath.c	dm mpath: switch paths in dm_blk_ioctl() code path	2020-06-25 15:41:48 +02:00
dm-mpath.h
dm-path-selector.c
dm-path-selector.h
dm-queue-length.c
dm-raid.c	dm raid: avoid bitmap with raid4/5/6 journal device	2019-12-01 09:13:42 +01:00
dm-raid1.c
dm-region-hash.c	dm: Use kzalloc for all structs with embedded biosets/mempools	2019-11-06 12:42:52 +01:00
dm-round-robin.c
dm-rq.c	dm rq: don't call blk_mq_queue_stopped() in dm_stop_queue()	2020-08-21 09:48:20 +02:00
dm-rq.h
dm-service-time.c
dm-snap-persistent.c	block: fix an integer overflow in logical block size	2020-01-23 08:20:30 +01:00
dm-snap-transient.c
dm-snap.c	dm: Use kzalloc for all structs with embedded biosets/mempools	2019-11-06 12:42:52 +01:00
dm-stats.c
dm-stats.h
dm-stripe.c
dm-switch.c
dm-sysfs.c
dm-table.c	overflow.h: Add allocation size calculation helpers	2020-09-03 11:22:33 +02:00
dm-target.c
dm-thin-metadata.c	dm thin metadata: Avoid returning cmd->bm wild pointer on error	2020-09-09 19:03:12 +02:00
dm-thin-metadata.h	dm thin: fix passdown_double_checking_shared_status()	2019-01-31 08:13:45 +01:00
dm-thin.c	dm: Use kzalloc for all structs with embedded biosets/mempools	2019-11-06 12:42:52 +01:00
dm-uevent.c
dm-uevent.h
dm-verity-fec.c	dm verity fec: fix hash block number in verity_fec_decode	2020-05-05 19:15:50 +02:00
dm-verity-fec.h
dm-verity-target.c	dm verity: use message limit for data block corruption message	2019-07-21 09:04:40 +02:00
dm-verity.h
dm-zero.c
dm-zoned-metadata.c	dm zoned: return NULL if dmz_get_zone_for_reclaim() fails to find a zone	2020-06-25 15:41:54 +02:00
dm-zoned-reclaim.c	dm zoned: return NULL if dmz_get_zone_for_reclaim() fails to find a zone	2020-06-25 15:41:54 +02:00
dm-zoned-target.c	dm zoned: assign max_io_len correctly	2020-07-09 09:36:33 +02:00
dm-zoned.h	dm zoned: reduce overhead of backing device checks	2019-12-17 20:39:25 +01:00
dm.c	dm: use noio when sending kobject event	2020-07-22 09:22:19 +02:00
dm.h
faulty.c
Kconfig
linear.c
linear.h
Makefile
md-cluster.c	md-cluster: fix wild pointer of unlock_all_bitmaps()	2020-08-21 09:48:04 +02:00
md-cluster.h
md.c	md: add feature flag MD_FEATURE_RAID0_LAYOUT	2020-06-25 15:42:02 +02:00
md.h	md: don't report active array_state until after revalidate_disk() completes.	2019-10-05 12:48:10 +02:00
multipath.c
multipath.h
raid0.c	md: add feature flag MD_FEATURE_RAID0_LAYOUT	2020-06-25 15:42:02 +02:00
raid0.h	md/raid0: avoid RAID0 data corruption due to layout confusion.	2019-10-05 12:48:13 +02:00
raid1-10.c
raid1.c	md: raid1: check rdev before reference in raid1_sync_request func	2020-01-09 10:17:52 +01:00
raid1.h
raid5-cache.c	md/raid5: fix 'out of memory' during raid cache recovery	2019-02-06 17:31:37 +01:00
raid5-log.h	md/raid5-cache: disable reshape completely	2018-10-10 08:54:20 +02:00
raid5-ppl.c
raid5.c	md/raid5: Fix Force reconstruct-write io stuck in degraded raid5	2020-08-21 09:48:18 +02:00
raid5.h
raid10.c	md/raid10: prevent access of uninitialized resync_pages offset	2019-12-01 09:14:17 +01:00
raid10.h