f2fs: disable roll-forward when active_logs = 2

The roll-forward mechanism should be activated when the number of active
logs is not 2.
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/file.c

@@ -132,6 +132,8 @@ static inline bool need_do_checkpoint(struct inode *inode)
 		need_cp = true;
 	else if (test_opt(sbi, FASTBOOT))
 		need_cp = true;
+	else if (sbi->active_logs == 2)
+		need_cp = true;
 
 	return need_cp;
 }

fs/f2fs/segment.c

@@ -1090,8 +1090,8 @@ static int __get_segment_type_4(struct page *page, enum page_type p_type)
 		else
 			return CURSEG_COLD_DATA;
 	} else {
-		if (IS_DNODE(page) && !is_cold_node(page))
-			return CURSEG_HOT_NODE;
+		if (IS_DNODE(page) && is_cold_node(page))
+			return CURSEG_WARM_NODE;
 		else
 			return CURSEG_COLD_NODE;
 	}