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

This patch adds a tracepoint for f2fs_write_{meta,node,data}_page to trace when
page is writting out.

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

4 files changed, 13 insertions, 0 deletions

diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index 4206f1664be5..c95d62281d7e 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -157,6 +157,8 @@ static int f2fs_write_meta_page(struct page *page,
         struct inode *inode = page->mapping->host;
         struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
 
+        trace_f2fs_writepage(page, META);
+
         if (unlikely(sbi->por_doing))
                 goto redirty_out;
         if (wbc->for_reclaim)
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ea58fb698ac6..b997d552880e 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -788,6 +788,8 @@ static int f2fs_write_data_page(struct page *page,
                 .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE,
         };
 
+        trace_f2fs_writepage(page, DATA);
+
         if (page->index < end_index)
                 goto write;
 
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 059aaf5dda2b..49bdddbcadea 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1199,6 +1199,8 @@ static int f2fs_write_node_page(struct page *page,
                 .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE,
         };
 
+        trace_f2fs_writepage(page, NODE);
+
         if (unlikely(sbi->por_doing))
                 goto redirty_out;
 
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index 483804b55742..d70991e69e58 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -751,6 +751,13 @@ DECLARE_EVENT_CLASS(f2fs__page,
                 __entry->dirty)
 );
 
+DEFINE_EVENT(f2fs__page, f2fs_writepage,
+
+        TP_PROTO(struct page *page, int type),
+
+        TP_ARGS(page, type)
+);
+
 DEFINE_EVENT(f2fs__page, f2fs_set_page_dirty,
 
         TP_PROTO(struct page *page, int type),