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b30f1607 |
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07-Feb-2023 |
Heinz Mauelshagen <heinzm@redhat.com> |
dm: add missing blank line after declarations/fix those Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
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86a3238c |
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25-Jan-2023 |
Heinz Mauelshagen <heinzm@redhat.com> |
dm: change "unsigned" to "unsigned int" Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
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3bd94003 |
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25-Jan-2023 |
Heinz Mauelshagen <heinzm@redhat.com> |
dm: add missing SPDX-License-Indentifiers 'GPL-2.0-only' is used instead of 'GPL-2.0' because SPDX has deprecated its use. Suggested-by: John Wiele <jwiele@redhat.com> Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com> Signed-off-by: Mike Snitzer <snitzer@kernel.org>
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be500ed7 |
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13-Apr-2021 |
Joe Thornber <ejt@redhat.com> |
dm space maps: improve performance with inc/dec on ranges of blocks When we break sharing on btree nodes we typically need to increment the reference counts to every value held in the node. This can cause a lot of repeated calls to the space maps. Fix this by changing the interface to the space map inc/dec methods to take ranges of adjacent blocks to be operated on. For installations that are using a lot of snapshots this will reduce cpu overhead of fundamental operations such as provisioning a new block, or deleting a snapshot, by as much as 10 times. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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9b696229 |
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05-Oct-2016 |
Joe Thornber <ejt@redhat.com> |
dm persistent data: add cursor skip functions to the cursor APIs Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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7d111c81 |
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15-Sep-2016 |
Joe Thornber <ejt@redhat.com> |
dm btree: introduce cursor api This uses prefetching to speed up iteration through a btree. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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993ceab9 |
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01-Dec-2015 |
Joe Thornber <ejt@redhat.com> |
dm thin metadata: fix bug in dm_thin_remove_range() dm_btree_remove_leaves() only unmaps a contiguous region so we need a loop, in __remove_range(), to handle ranges that contain multiple regions. A new btree function, dm_btree_lookup_next(), is introduced which is more efficiently able to skip over regions of the thin device which aren't mapped. __remove_range() uses dm_btree_lookup_next() for each iteration of __remove_range()'s loop. Also, improve description of dm_btree_remove_leaves(). Fixes: 6550f075 ("dm thin metadata: add dm_thin_remove_range()") Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org # 4.1+
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4ec331c3 |
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13-Apr-2015 |
Joe Thornber <ejt@redhat.com> |
dm btree: add dm_btree_remove_leaves() Removes a range of leaf values from the tree. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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f164e690 |
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20-Dec-2013 |
Joe Thornber <ejt@redhat.com> |
dm btree: add dm_btree_find_lowest_key dm_btree_find_lowest_key is the reciprocal of dm_btree_find_highest_key. Factor out common code for dm_btree_find_{highest,lowest}_key. dm_btree_find_lowest_key is needed for an upcoming DM target, as such it is best to get this interface in place. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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4e7f1f90 |
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01-Mar-2013 |
Joe Thornber <ejt@redhat.com> |
dm persistent data: add btree_walk Add dm_btree_walk to iterate through the contents of a btree. This will be used by the dm cache target. Signed-off-by: Joe Thornber <ejt@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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018cede9 |
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01-Mar-2013 |
Mike Snitzer <snitzer@redhat.com> |
dm persistent data: set some btree fn parms const Mark some constant parameters constant in some dm-btree functions. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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83f0d77a |
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29-Oct-2012 |
Masanari Iida <standby24x7@gmail.com> |
md: Fix typo in drivers/md Correct spelling typo in drivers/md. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
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3241b1d3 |
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31-Oct-2011 |
Joe Thornber <thornber@redhat.com> |
dm: add persistent data library The persistent-data library offers a re-usable framework for the storage and management of on-disk metadata in device-mapper targets. It's used by the thin-provisioning target in the next patch and in an upcoming hierarchical storage target. For further information, please read Documentation/device-mapper/persistent-data.txt Signed-off-by: Joe Thornber <thornber@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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