f2fs: introduce f2fs_balance_fs_bg for some background jobs

This patch merges some background jobs into this new function.

Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 3 insertions, 7 deletions

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 89dd8a5a3ca3..7bac4815f1d6 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -240,7 +240,7 @@ retry:
         write_unlock(&nm_i->nat_tree_lock);
 }
 
-static int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
+int try_to_free_nats(struct f2fs_sb_info *sbi, int nr_shrink)
 {
         struct f2fs_nm_info *nm_i = NM_I(sbi);
 
@@ -1205,12 +1205,8 @@ static int f2fs_write_node_pages(struct address_space *mapping,
         struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
         long nr_to_write = wbc->nr_to_write;
 
-        /* First check balancing cached NAT entries */
-        if (try_to_free_nats(sbi, NAT_ENTRY_PER_BLOCK) ||
-                                excess_prefree_segs(sbi)) {
-                f2fs_sync_fs(sbi->sb, true);
-                return 0;
-        }
+        /* balancing f2fs's metadata in background */
+        f2fs_balance_fs_bg(sbi);
 
         /* collect a number of dirty node pages and write together */
         if (get_pages(sbi, F2FS_DIRTY_NODES) < COLLECT_DIRTY_NODES)