fs/f2fs/shrinker.c

19 static unsigned long __count_nat_entries(struct f2fs_sb_info *sbi)
21 	return NM_I(sbi)->nat_cnt[RECLAIMABLE_NAT];
24 static unsigned long __count_free_nids(struct f2fs_sb_info *sbi)
26 	long count = NM_I(sbi)->nid_cnt[FREE_NID] - MAX_FREE_NIDS;
31 static unsigned long __count_extent_cache(struct f2fs_sb_info *sbi,
34 	struct extent_tree_info *eti = &sbi->extent_tree[type];
43 	struct f2fs_sb_info *sbi;
50 		sbi = list_entry(p, struct f2fs_sb_info, s_list);
53 		if (!mutex_trylock(&sbi->umount_mutex)) {
60 		count += __count_extent_cache(sbi, EX_READ);
63 		count += __count_extent_cache(sbi, EX_BLOCK_AGE);
66 		count += __count_nat_entries(sbi);
69 		count += __count_free_nids(sbi);
73 		mutex_unlock(&sbi->umount_mutex);
83 	struct f2fs_sb_info *sbi;
94 		sbi = list_entry(p, struct f2fs_sb_info, s_list);
96 		if (sbi->shrinker_run_no == run_no)
100 		if (!mutex_trylock(&sbi->umount_mutex)) {
106 		sbi->shrinker_run_no = run_no;
109 		freed += f2fs_shrink_age_extent_tree(sbi, nr >> 2);
112 		freed += f2fs_shrink_read_extent_tree(sbi, nr >> 2);
116 			freed += f2fs_try_to_free_nats(sbi, nr - freed);
120 			freed += f2fs_try_to_free_nids(sbi, nr - freed);
124 		list_move_tail(&sbi->s_list, &f2fs_list);
125 		mutex_unlock(&sbi->umount_mutex);
133 void f2fs_join_shrinker(struct f2fs_sb_info *sbi)
136 	list_add_tail(&sbi->s_list, &f2fs_list);
140 void f2fs_leave_shrinker(struct f2fs_sb_info *sbi)
142 	f2fs_shrink_read_extent_tree(sbi, __count_extent_cache(sbi, EX_READ));
143 	f2fs_shrink_age_extent_tree(sbi,
144 				__count_extent_cache(sbi, EX_BLOCK_AGE));
147 	list_del_init(&sbi->s_list);