f2fs: add a tracepoint for f2fs_write_{meta,node,data}_pages

This patch adds a tracepoint for f2fs_write_{meta,node,data}_pages to trace when
pages are fsyncing/flushing.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 49bdddbcadea..3d60d3d34ed2 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1242,6 +1242,8 @@ static int f2fs_write_node_pages(struct address_space *mapping,
         struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb);
         long diff;
 
+        trace_f2fs_writepages(mapping->host, wbc, NODE);
+
         /* balancing f2fs's metadata in background */
         f2fs_balance_fs_bg(sbi);