/* node block offset on the NAT area dedicated to the given start node id */
#define NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK)
-/* # of pages to perform readahead before building free nids */
+/* # of pages to perform synchronous readahead before building free nids */
#define FREE_NID_PAGES 4
+#define DEF_RA_NID_PAGES 4 /* # of nid pages to be readaheaded */
+
/* maximum readahead size for node during getting data blocks */
#define MAX_RA_NODE 128