linux-stable.git/fs/f2fs/shrinker.c, branch linux-4.3.y

f2fs: shrink free_nids entries

2015-08-20T16:00:06+00:00

This patch introduces __count_free_nids/try_to_free_nids and registers
them in slab shrinker for shrinking under memory pressure.

Signed-off-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: use extent_cache by default

2015-08-04T21:09:56+00:00

We don't need to handle the duplicate extent information.

The integrated rule is:
 - update on-disk extent with largest one tracked by in-memory extent_cache
 - destroy extent_tree for the truncation case
 - drop per-inode extent_cache by shrinker

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: shrink extent_cache entries

2015-08-04T21:09:55+00:00

This patch registers shrinking extent_caches.

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: shrink nat_cache entries

2015-08-04T21:09:55+00:00

This patch registers shrinking nat_cache entries.

Reviewed-by: Chao Yu 
Signed-off-by: Jaegeuk Kim

f2fs: introduce a shrinker for mounted fs

2015-08-04T21:09:54+00:00

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 
Signed-off-by: Jaegeuk Kim