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/node.h b/fs/f2fs/node.h
index c2015b7..5decc1a 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -42,6 +42,7 @@
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 */
};