f2fs: shrink extent_cache entries
This patch registers shrinking extent_caches.
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/shrinker.c b/fs/f2fs/shrinker.c
index c4bd6ee..1f0a131 100644
--- a/fs/f2fs/shrinker.c
+++ b/fs/f2fs/shrinker.c
@@ -23,6 +23,11 @@
return NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt;
}
+static unsigned long __count_extent_cache(struct f2fs_sb_info *sbi)
+{
+ return sbi->total_ext_tree + atomic_read(&sbi->total_ext_node);
+}
+
unsigned long f2fs_shrink_count(struct shrinker *shrink,
struct shrink_control *sc)
{
@@ -42,6 +47,9 @@
}
spin_unlock(&f2fs_list_lock);
+ /* count extent cache entries */
+ count += __count_extent_cache(sbi);
+
/* shrink clean nat cache entries */
count += __count_nat_entries(sbi);
@@ -82,8 +90,12 @@
sbi->shrinker_run_no = run_no;
+ /* shrink extent cache entries */
+ freed += f2fs_shrink_extent_tree(sbi, nr >> 1);
+
/* shrink clean nat cache entries */
- freed += try_to_free_nats(sbi, nr);
+ if (freed < nr)
+ freed += try_to_free_nats(sbi, nr - freed);
spin_lock(&f2fs_list_lock);
p = p->next;