tree 741bcc6a3c0df01f3180eb6cb934019313959ca4
parent 244f4fc1c530c4e486f0e4f0909c0514e4539ba2
author Jaegeuk Kim <jaegeuk@kernel.org> 1434740481 -0700
committer Jaegeuk Kim <jaegeuk@kernel.org> 1438722594 -0700

f2fs: introduce a shrinker for mounted fs

This patch introduces a shrinker targeting to reduce memory footprint consumed
by a number of in-memory f2fs data structures.

In addition, it newly adds:
 - sbi->umount_mutex to avoid data races on shrinker and put_super
 - sbi->shruinker_run_no to not revisit objects

Note that the basic implementation was copied from fs/ubifs/shrinker.c

Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>