Anssi Hannula 44fa816bb7 dm cache: fix race affecting dirty block count ... nr_dirty is updated without locking, causing it to drift so that it is non-zero (either a small positive integer, or a very large one when an underflow occurs) even when there are no actual dirty blocks. This was due to a race between the workqueue and map function accessing nr_dirty in parallel without proper protection. People were seeing under runs due to a race on increment/decrement of nr_dirty, see: https://lkml.org/lkml/2014/6/3/648 Fix this by using an atomic_t for nr_dirty. Reported-by: roma1390@gmail.com Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi> Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org		2014-08-01 12:25:22 -04:00
..
bcache	arch: Mass conversion of smp_mb__*()	2014-04-18 14:20:48 +02:00
persistent-data	dm transaction manager: fix corruption due to non-atomic transaction commit	2014-03-27 16:56:23 -04:00
bitmap.c	md/bitmap: remove confusing code from filemap_get_page.	2014-05-29 16:59:47 +10:00
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: implement per bucket locking in the dm_bio_prison hash table	2014-06-11 16:48:54 -04:00
dm-bio-prison.h	dm thin: return ENOSPC instead of EIO when error_if_no_space enabled	2014-06-03 13:44:08 -04:00
dm-bio-record.h	dm: Refactor for new bio cloning/splitting	2013-11-23 22:33:55 -08:00
dm-bufio.c	dm bufio: fully initialize shrinker	2014-08-01 12:07:21 -04:00
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: remove remainder of distinct discard block size	2014-03-27 16:56:23 -04:00
dm-cache-metadata.c	dm cache metadata: do not allow the data block size to change	2014-07-15 14:07:50 -04:00
dm-cache-metadata.h	dm cache: fix a lock-inversion	2014-04-04 14:53:05 -04:00
dm-cache-policy-cleaner.c	dm cache: policy change version from string to integer set	2013-03-20 17:21:27 +00:00
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 mq: fix memory allocation failure for large cache devices	2014-02-28 12:18:29 -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 race affecting dirty block count	2014-08-01 12:25:22 -04:00
dm-crypt.c	dm crypt, dm zero: update author name following legal name change	2014-07-10 16:44:14 -04:00
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: replace simple_strtoul	2012-07-27 15:07:59 +01:00
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: fix a race condition in the wake up code for sync_io	2014-07-10 16:44:14 -04:00
dm-ioctl.c	dm: allow remove to be deferred	2013-11-09 18:20:22 -05:00
dm-kcopyd.c	dm: stop using WQ_NON_REENTRANT	2013-08-23 09:02:13 -04:00
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	connector: add portid to unicast in addition to broadcasting	2014-02-07 15:40:17 -08:00
dm-log-userspace-transfer.h
dm-log.c	dm: use memweight()	2012-07-30 17:25:16 -07:00
dm-mpath.c	dm mpath: fix IO hang due to logic bug in multipath_busy	2014-07-10 16:44:15 -04:00
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	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
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: Remember the last sync operation that was performed	2013-06-26 12:38:24 +10:00
dm-region-hash.c	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
dm-round-robin.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-service-time.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-snap-persistent.c	dm snapshot: fix metadata corruption	2014-03-03 17:58:13 -05:00
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	. Add dm_accept_partial_bio interface to DM core to allow DM targets	2014-06-12 13:33:29 -07:00
dm-stats.c	dm stats: initialize read-only module parameter	2013-12-10 19:13:21 -05:00
dm-stats.h	dm: add statistics support	2013-09-05 20:46:06 -04:00
dm-stripe.c	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
dm-switch.c	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
dm-sysfs.c	dm sysfs: fix a module unload race	2014-01-14 23:23:04 -05:00
dm-table.c	dm: remove symbol export for dm_set_device_limits	2014-06-04 09:46:34 -04:00
dm-target.c	dm: allow error target to replace bio-based and request-based targets	2013-09-05 20:46:05 -04:00
dm-thin-metadata.c	dm thin metadata: do not allow the data block size to change	2014-07-15 14:05:26 -04:00
dm-thin-metadata.h	dm thin: ensure user takes action to validate data and metadata consistency	2014-03-05 15:25:35 -05:00
dm-thin.c	dm thin: update discard_granularity to reflect the thin-pool blocksize	2014-06-11 16:56:12 -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-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: allocate a special workqueue for deferred device removal	2014-07-10 16:44:13 -04:00
dm.h	dm table: add dm_table_run_md_queue_async	2014-03-27 16:56:24 -04:00
faulty.c	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
Kconfig	dm: add era target	2014-03-27 16:56:23 -04:00
linear.c	block: Introduce new bio_split()	2013-11-23 22:33:57 -08:00
linear.h
Makefile	dm: add era target	2014-03-27 16:56:23 -04:00
md.c	md: flush writes before starting a recovery.	2014-07-03 10:44:45 +10:00
md.h	md/bitmap: don't abuse i_writecount for bitmap files.	2014-04-09 12:26:59 +10:00
multipath.c	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
multipath.h
raid0.c	block: Introduce new bio_split()	2013-11-23 22:33:57 -08:00
raid0.h	md: add proper merge_bvec handling to RAID0 and Linear.	2012-03-19 12:46:39 +11:00
raid1.c	md/raid1: r1buf_pool_alloc: free allocate pages when subsequent allocation fails.	2014-04-09 14:42:23 +10:00
raid1.h	raid1: Rewrite the implementation of iobarrier.	2013-11-19 15:19:18 +11:00
raid5.c	Assorted md fixes for 3.16	2014-06-11 08:33:41 -07:00
raid5.h	raid5: add an option to avoid copy data from bio to stripe cache	2014-05-29 16:59:47 +10:00
raid10.c	md/raid10: call wait_barrier() for each request submitted.	2014-05-06 09:49:26 +10:00
raid10.h	MD RAID10: Improve redundancy for 'far' and 'offset' algorithms (part 1)	2013-02-26 11:55:30 +11:00