f2fs: skip unnecessary node writes during fsync
If multiple redundant fsync calls are triggered, we don't need to write its
node pages with fsync mark continuously.
So, this patch adds FI_NEED_FSYNC to track whether the latest node block is
written with the fsync mark or not.
If the mark was set, a new fsync doesn't need to write a node block.
Otherwise, we should do a new node block with the mark for roll-forward
recovery.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 7f37567..a8c38dc 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -183,6 +183,8 @@
} else {
/* if there is no written node page, write its inode page */
while (!sync_node_pages(sbi, inode->i_ino, &wbc)) {
+ if (fsync_mark_done(sbi, inode->i_ino))
+ goto out;
mark_inode_dirty_sync(inode);
ret = f2fs_write_inode(inode, NULL);
if (ret)