ext4: move handling of list of shrinkable inodes into extent status code
Currently callers adding extents to extent status tree were responsible
for adding the inode to the list of inodes with freeable extents. This
is error prone and puts list handling in unnecessarily many places.
Just add inode to the list automatically when the first non-delay extent
is added to the tree and remove inode from the list when the last
non-delay extent is removed.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index 0193ca1..de2d9d8b 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -298,7 +298,7 @@
trace_ext4_es_find_delayed_extent_range_exit(inode, es);
}
-void ext4_es_list_add(struct inode *inode)
+static void ext4_es_list_add(struct inode *inode)
{
struct ext4_inode_info *ei = EXT4_I(inode);
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
@@ -314,7 +314,7 @@
spin_unlock(&sbi->s_es_lock);
}
-void ext4_es_list_del(struct inode *inode)
+static void ext4_es_list_del(struct inode *inode)
{
struct ext4_inode_info *ei = EXT4_I(inode);
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
@@ -344,7 +344,8 @@
* We don't count delayed extent because we never try to reclaim them
*/
if (!ext4_es_is_delayed(es)) {
- EXT4_I(inode)->i_es_shk_nr++;
+ if (!EXT4_I(inode)->i_es_shk_nr++)
+ ext4_es_list_add(inode);
percpu_counter_inc(&EXT4_SB(inode->i_sb)->
s_es_stats.es_stats_shk_cnt);
}
@@ -363,7 +364,8 @@
/* Decrease the shrink counter when this es is not delayed */
if (!ext4_es_is_delayed(es)) {
BUG_ON(EXT4_I(inode)->i_es_shk_nr == 0);
- EXT4_I(inode)->i_es_shk_nr--;
+ if (!--EXT4_I(inode)->i_es_shk_nr)
+ ext4_es_list_del(inode);
percpu_counter_dec(&EXT4_SB(inode->i_sb)->
s_es_stats.es_stats_shk_cnt);
}