f2fs: shrink nat_cache entries
This patch registers shrinking nat_cache entries.
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 16e9b43..c4bd6ee 100644
--- a/fs/f2fs/shrinker.c
+++ b/fs/f2fs/shrinker.c
@@ -18,6 +18,11 @@
static DEFINE_SPINLOCK(f2fs_list_lock);
static unsigned int shrinker_run_no;
+static unsigned long __count_nat_entries(struct f2fs_sb_info *sbi)
+{
+ return NM_I(sbi)->nat_cnt - NM_I(sbi)->dirty_nat_cnt;
+}
+
unsigned long f2fs_shrink_count(struct shrinker *shrink,
struct shrink_control *sc)
{
@@ -37,7 +42,8 @@
}
spin_unlock(&f2fs_list_lock);
- /* TODO: count # of objects */
+ /* shrink clean nat cache entries */
+ count += __count_nat_entries(sbi);
spin_lock(&f2fs_list_lock);
p = p->next;
@@ -76,7 +82,8 @@
sbi->shrinker_run_no = run_no;
- /* TODO: shrink caches */
+ /* shrink clean nat cache entries */
+ freed += try_to_free_nats(sbi, nr);
spin_lock(&f2fs_list_lock);
p = p->next;