linux.git/drivers/md/dm-cache-metadata.c, branch v4.11

dm cache metadata: fix metadata2 format's blocks_are_clean_separate_dirty

2017-03-20T20:00:49+00:00

The dm_bitset_cursor_begin() call was using the incorrect nr_entries.
Also, the last dm_bitset_cursor_next() must be avoided if we're at the
end of the cursor.

Fixes: 7f1b21591a6 ("dm cache metadata: use cursor api in blocks_are_clean_separate_dirty()")
Signed-off-by: Joe Thornber 
Signed-off-by: Mike Snitzer

dm cache metadata: use cursor api in blocks_are_clean_separate_dirty()

2017-02-16T18:12:51+00:00

Signed-off-by: Mike Snitzer

dm cache metadata: use dm_bitset_new() to create the dirty bitset in format 2

2017-02-16T18:12:49+00:00

Big speed up with large configs.

Signed-off-by: Joe Thornber 
Signed-off-by: Mike Snitzer

dm cache metadata: name the cache block that couldn't be loaded

2017-02-16T18:12:48+00:00

Improves __load_mapping_v1() and __load_mapping_v2() DMERR messages to
explicitly name the cache block number whose mapping couldn't be
loaded.

Signed-off-by: Mike Snitzer

dm cache metadata: add "metadata2" feature

2017-02-16T18:12:47+00:00

If "metadata2" is provided as a table argument when creating/loading a
cache target a more compact metadata format, with separate dirty bits,
is used.  "metadata2" improves speed of shutting down a cache target.

Signed-off-by: Joe Thornber 
Signed-off-by: Mike Snitzer

dm cache metadata: use bitset cursor api to load discard bitset

2017-02-16T18:12:46+00:00

Signed-off-by: Joe Thornber 
Signed-off-by: Mike Snitzer

dm cache metadata: remove an extra newline in DMERR and code

2016-11-21T14:52:02+00:00

Signed-off-by: Mike Snitzer

dm cache metadata: switch to using the new cursor api for loading metadata

2016-09-22T15:15:05+00:00

This change offers a pretty significant performance improvement.

Signed-off-by: Joe Thornber 
Signed-off-by: Mike Snitzer

dm cache: speed up writing of the hint array

2016-09-22T15:15:02+00:00

It's far quicker to always delete the hint array and recreate with
dm_array_new() because we avoid the copying caused by mutation.

Also simplifies the policy interface, replacing the walk_hints() with
the simpler get_hint().

Signed-off-by: Joe Thornber 
Signed-off-by: Mike Snitzer

dm cache metadata: fix cmd_read_lock() acquiring write lock

2016-04-17T15:24:46+00:00

Commit 9567366fefdd ("dm cache metadata: fix READ_LOCK macros and
cleanup WRITE_LOCK macros") uses down_write() instead of down_read() in
cmd_read_lock(), yet up_read() is used to release the lock in
READ_UNLOCK().  Fix it.

Fixes: 9567366fefdd ("dm cache metadata: fix READ_LOCK macros and cleanup WRITE_LOCK macros")
Cc: stable@vger.kernel.org
Signed-off-by: Ahmed Samy 
Signed-off-by: Mike Snitzer