Joe Thornber 3e1a069909 dm thin: fix out of data space handling ... Ideally a thin pool would never run out of data space; the low water mark would trigger userland to extend the pool before we completely run out of space. However, many small random IOs to unprovisioned space can consume data space at an alarming rate. Adjust your low water mark if you're frequently seeing "out-of-data-space" mode. Before this fix, if data space ran out the pool would be put in PM_READ_ONLY mode which also aborted the pool's current metadata transaction (data loss for any changes in the transaction). This had a side-effect of needlessly compromising data consistency. And retry of queued unserviceable bios, once the data pool was resized, could initiate changes to potentially inconsistent pool metadata. Now when the pool's data space is exhausted transition to a new pool mode (PM_OUT_OF_DATA_SPACE) that allows metadata to be changed but data may not be allocated. This allows users to remove thin volumes or discard data to recover data space. The pool is no longer put in PM_READ_ONLY mode in response to the pool running out of data space. And PM_READ_ONLY mode no longer aborts the pool's current metadata transaction. Also, set_pool_mode() will now notify userspace when the pool mode is changed. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>		2014-03-05 15:26:58 -05:00
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bcache	Merge branch 'bcache-for-3.14' of git://evilpiepirate.org/~kent/linux-bcache into for-linus	2014-01-30 12:57:55 -07:00
persistent-data	dm: fix Kconfig indentation	2014-03-03 17:31:07 -05:00
Kconfig	dm: fix Kconfig indentation	2014-03-03 17:31:07 -05:00
Makefile	dm sysfs: fix a module unload race	2014-01-14 23:23:04 -05:00
bitmap.c	kernfs: s/sysfs_dirent/kernfs_node/ and rename its friends accordingly	2013-12-11 15:28:36 -08:00
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: add cache target	2013-03-01 22:45:51 +00:00
dm-bio-prison.h	dm: add cache target	2013-03-01 22:45:51 +00:00
dm-bio-record.h	dm: Refactor for new bio cloning/splitting	2013-11-23 22:33:55 -08:00
dm-bufio.c	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -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: add cache target	2013-03-01 22:45:51 +00:00
dm-cache-metadata.c	dm cache metadata: check the metadata version when reading the superblock	2013-11-11 11:37:49 -05:00
dm-cache-metadata.h	dm cache: add passthrough mode	2013-11-11 11:37:49 -05:00
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 truncation bug when mapping I/O to >2TB fast device	2014-02-28 09:23:02 -05:00
dm-crypt.c	block: Convert drivers to immutable biovecs	2013-11-23 22:33:51 -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-exception-store.c	dm: replace simple_strtoul	2012-07-27 15:07:59 +01:00
dm-exception-store.h	dm snapshot: test chunk size against both origin and snapshot	2010-08-12 04:13:51 +01:00
dm-flakey.c	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
dm-io.c	dm io: fix I/O to multiple destinations	2014-02-17 11:00:05 -05:00
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/userns: replace netlink uses of cap_raised() with capable()	2012-05-10 23:21:39 -04:00
dm-log-userspace-transfer.h	dm log: userspace add luid to distinguish between concurrent log instances	2009-09-04 20:40:34 +01:00
dm-log.c	dm: use memweight()	2012-07-30 17:25:16 -07:00
dm-mpath.c	dm mpath: fix stalls when handling invalid ioctls	2014-02-26 09:44:44 -05:00
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 mpath: add start_io and nr_bytes to path selectors	2009-06-22 10:12:27 +01:00
dm-queue-length.c	dm: reject trailing characters in sccanf input	2012-03-28 18:41:26 +01:00
dm-raid.c	MD: Remember the last sync operation that was performed	2013-06-26 12:38:24 +10:00
dm-raid1.c	dm raid1: fix immutable biovec related BUG when retrying read bio	2014-02-18 10:48:57 -05:00
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	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
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 table: remove unused buggy code that extends the targets array	2014-01-07 10:11:44 -05:00
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: ensure user takes action to validate data and metadata consistency	2014-03-05 15:25:35 -05:00
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: fix out of data space handling	2014-03-05 15:26:58 -05:00
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	block: Generic bio chaining	2013-11-23 22:33:56 -08:00
dm-zero.c	dm: rename request variables to bios	2013-03-01 22:45:47 +00:00
dm.c	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
dm.h	dm sysfs: fix a module unload race	2014-01-14 23:23:04 -05:00
faulty.c	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
linear.c	block: Introduce new bio_split()	2013-11-23 22:33:57 -08:00
linear.h	md/linear: typedef removal: linear_conf_t -> struct linear_conf	2011-10-11 16:48:54 +11:00
md.c	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
md.h	Driver core / sysfs patches for 3.14-rc1	2014-01-20 15:49:44 -08:00
multipath.c	block: Abstract out bvec iterator	2013-11-23 22:33:47 -08:00
multipath.h	md/multipath: typedef removal: multipath_conf_t -> struct mpconf	2011-10-11 16:48:57 +11:00
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: restore ability for check and repair to fix read errors.	2014-02-05 12:26:04 +11:00
raid1.h	raid1: Rewrite the implementation of iobarrier.	2013-11-19 15:19:18 +11:00
raid5.c	md/raid5: Fix CPU hotplug callback registration	2014-02-13 13:46:45 +11:00
raid5.h	md update for 3.13.	2013-11-20 13:05:25 -08:00
raid10.c	Merge branch 'for-3.14/core' of git://git.kernel.dk/linux-block	2014-01-30 11:19:05 -08:00
raid10.h	MD RAID10: Improve redundancy for 'far' and 'offset' algorithms (part 1)	2013-02-26 11:55:30 +11:00