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>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index c2015b71ff87..5decc1a375f0 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -42,6 +42,7 @@ struct node_info {
 struct nat_entry {
         struct list_head list;  /* for clean or dirty nat list */
         bool checkpointed;      /* whether it is checkpointed or not */
+        bool fsync_done;        /* whether the latest node has fsync mark */
         struct node_info ni;    /* in-memory node information */
 };