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A lot of attention was paid to improving the thin-provisioning target's
handling of metadata operation failures and running out of space. A new
'error_if_no_space' feature was added to allow users to error IOs rather
than queue them when either the data or metadata space is exhausted.
Additional fixes/features include:
- a few fixes to properly support thin metadata device resizing
- a solution for reliably waiting for a DM device's embedded kobject to
be released before destroying the device
- old dm-snapshot is updated to use the dm-bufio interface to take
advantage of readahead capabilities that improve snapshot activation
- new dm-cache target tunables to control how quickly data is promoted
to the cache (fast) device
- improved write efficiency of cluster mirror target by combining
userspace flush and mark requests
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Merge tag 'dm-3.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device-mapper changes from Mike Snitzer:
"A lot of attention was paid to improving the thin-provisioning
target's handling of metadata operation failures and running out of
space. A new 'error_if_no_space' feature was added to allow users to
error IOs rather than queue them when either the data or metadata
space is exhausted.
Additional fixes/features include:
- a few fixes to properly support thin metadata device resizing
- a solution for reliably waiting for a DM device's embedded kobject
to be released before destroying the device
- old dm-snapshot is updated to use the dm-bufio interface to take
advantage of readahead capabilities that improve snapshot
activation
- new dm-cache target tunables to control how quickly data is
promoted to the cache (fast) device
- improved write efficiency of cluster mirror target by combining
userspace flush and mark requests"
* tag 'dm-3.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: (35 commits)
dm log userspace: allow mark requests to piggyback on flush requests
dm space map metadata: fix bug in resizing of thin metadata
dm cache: add policy name to status output
dm thin: fix pool feature parsing
dm sysfs: fix a module unload race
dm snapshot: use dm-bufio prefetch
dm snapshot: use dm-bufio
dm snapshot: prepare for switch to using dm-bufio
dm snapshot: use GFP_KERNEL when initializing exceptions
dm cache: add block sizes and total cache blocks to status output
dm btree: add dm_btree_find_lowest_key
dm space map metadata: fix extending the space map
dm space map common: make sure new space is used during extend
dm: wait until embedded kobject is released before destroying a device
dm: remove pointless kobject comparison in dm_get_from_kobject
dm snapshot: call destroy_work_on_stack() to pair with INIT_WORK_ONSTACK()
dm cache policy mq: introduce three promotion threshold tunables
dm cache policy mq: use list_del_init instead of list_del + INIT_LIST_HEAD
dm thin: fix set_pool_mode exposed pool operation races
dm thin: eliminate the no_free_space flag
...
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