f2fs: avoid freqeunt write_inode calls

If update_inode is called, we don't need to do write_inode.
So, let's use a *dirty* flag for each inode.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index b44a4c1194ea..2b2d45d19e3e 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -192,6 +192,7 @@ void update_inode(struct inode *inode, struct page *node_page)
 
         set_cold_node(inode, node_page);
         set_page_dirty(node_page);
+        clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
 }
 
 int update_inode_page(struct inode *inode)
@@ -217,6 +218,9 @@ int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
                         inode->i_ino == F2FS_META_INO(sbi))
                 return 0;
 
+        if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
+                return 0;
+
         if (wbc)
                 f2fs_balance_fs(sbi);