Waiman Long 92744323a4 fs/dcache: Fix incorrect nr_dentry_unused accounting in shrink_dcache_sb()
commit 1dbd449c9943e3145148cc893c2461b72ba6fef0 upstream.

The nr_dentry_unused per-cpu counter tracks dentries in both the LRU
lists and the shrink lists where the DCACHE_LRU_LIST bit is set.

The shrink_dcache_sb() function moves dentries from the LRU list to a
shrink list and subtracts the dentry count from nr_dentry_unused.  This
is incorrect as the nr_dentry_unused count will also be decremented in
shrink_dentry_list() via d_shrink_del().

To fix this double decrement, the decrement in the shrink_dcache_sb()
function is taken out.

Fixes: 4e717f5c1083 ("list_lru: remove special case function list_lru_dispose_all."
Cc: stable@kernel.org
Signed-off-by: Waiman Long <longman@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-02-06 17:33:28 +01:00
..
2016-10-15 12:09:13 -07:00
2017-08-06 18:59:43 -07:00
2018-12-05 19:42:40 +01:00
2019-01-31 08:12:37 +01:00
2018-11-21 09:26:03 +01:00
2019-01-13 10:03:52 +01:00
2018-12-17 09:38:35 +01:00
2017-11-30 08:39:04 +00:00
2018-12-21 14:11:31 +01:00
2017-06-14 15:06:00 +02:00
2016-09-27 21:20:53 -04:00
2016-09-27 18:47:38 -04:00
2018-05-16 10:08:42 +02:00
2018-02-17 13:21:15 +01:00
2017-06-14 15:06:01 +02:00