1 files changed, 8 insertions, 3 deletions
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index ee6d28684ee8..c97215432100 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -17,15 +17,15 @@
 /* # of pages to perform readahead before building free nids */
 #define FREE_NID_PAGES 4
 
-/* maximum # of free node ids to produce during build_free_nids */
-#define MAX_FREE_NIDS (NAT_ENTRY_PER_BLOCK * FREE_NID_PAGES)
-
 /* maximum readahead size for node during getting data blocks */
 #define MAX_RA_NODE		128
 
 /* maximum cached nat entries to manage memory footprint */
 #define NM_WOUT_THRESHOLD	(64 * NAT_ENTRY_PER_BLOCK)
 
+/* control the memory footprint threshold (10MB per 1GB ram) */
+#define DEF_RAM_THRESHOLD	10
+
 /* vector size for gang look-up from nat cache that consists of radix tree */
 #define NATVEC_SIZE	64
 
@@ -77,6 +77,11 @@ static inline void node_info_from_raw_nat(struct node_info *ni,
 	ni->version = raw_ne->version;
 }
 
+enum nid_type {
+	FREE_NIDS,	/* indicates the free nid list */
+	NAT_ENTRIES	/* indicates the cached nat entry */
+};
+
 /*
  * For free nid mangement
  */