f2fs: increase pages_skipped when skipping writepages

This patch increases pages_skipped when skipping writepages.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>

fs/f2fs/checkpoint.c

@@ -190,12 +190,9 @@ static int f2fs_write_meta_pages(struct address_space *mapping,
 	int nrpages = nr_pages_to_skip(sbi, META);
 	long written;
 
-	if (wbc->for_kupdate)
-		return 0;
-
 	/* collect a number of dirty meta pages and write together */
-	if (get_pages(sbi, F2FS_DIRTY_META) < nrpages)
-		return 0;
+	if (wbc->for_kupdate || get_pages(sbi, F2FS_DIRTY_META) < nrpages)
+		goto skip_write;
 
 	/* if mounting is failed, skip writing node pages */
 	mutex_lock(&sbi->cp_mutex);
@@ -203,6 +200,10 @@ static int f2fs_write_meta_pages(struct address_space *mapping,
 	mutex_unlock(&sbi->cp_mutex);
 	wbc->nr_to_write -= written;
 	return 0;
+
+skip_write:
+	wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
+	return 0;
 }
 
 long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,

fs/f2fs/data.c

@@ -870,7 +870,7 @@ static int f2fs_write_data_pages(struct address_space *mapping,
 
 	if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE &&
 			get_dirty_dents(inode) < nr_pages_to_skip(sbi, DATA))
-		return 0;
+		goto skip_write;
 
 	if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) {
 		desired_nrtw = MAX_DESIRED_PAGES_WP;
@@ -892,6 +892,10 @@ static int f2fs_write_data_pages(struct address_space *mapping,
 
 	wbc->nr_to_write -= excess_nrtw;
 	return ret;
+
+skip_write:
+	wbc->pages_skipped += get_dirty_dents(inode);
+	return 0;
 }
 
 static int f2fs_write_begin(struct file *file, struct address_space *mapping,

fs/f2fs/node.c

@@ -1209,7 +1209,7 @@ static int f2fs_write_node_pages(struct address_space *mapping,
 
 	/* collect a number of dirty node pages and write together */
 	if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE))
-		return 0;
+		goto skip_write;
 
 	/* if mounting is failed, skip writing node pages */
 	wbc->nr_to_write = 3 * max_hw_blocks(sbi);
@@ -1218,6 +1218,10 @@ static int f2fs_write_node_pages(struct address_space *mapping,
 	wbc->nr_to_write = nr_to_write - (3 * max_hw_blocks(sbi) -
 						wbc->nr_to_write);
 	return 0;
+
+skip_write:
+	wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_NODES);
+	return 0;
 }
 
 static int f2fs_set_node_page_dirty(struct page *page)