Add another FIXME comment

diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c
index b485e156fbcc6427cc5224d304925a14cdb97b4b..489bbde65618e372a2e9df5b28051fa3f4ef6531 100644 (file)
--- a/libraries/libmdb/mdb.c
+++ b/libraries/libmdb/mdb.c
@@ -226,6 +226,9 @@ typedef struct MDB_ppage {                                  /* ordered list of pages */
 } MDB_ppage;
 SLIST_HEAD(page_stack, MDB_ppage);
 
+/* FIXME: tree depth is mostly bounded, we should just
+ * use a fixed array and avoid malloc/pointer chasing
+ */
 #define CURSOR_EMPTY(c)                 SLIST_EMPTY(&(c)->mc_stack)
 #define CURSOR_TOP(c)           SLIST_FIRST(&(c)->mc_stack)
 #define CURSOR_POP(c)           SLIST_REMOVE_HEAD(&(c)->mc_stack, mp_entry)