diff --git a/exec.c b/exec.c
index 011babd..60cf46a 100644
--- a/exec.c
+++ b/exec.c
@@ -187,10 +187,12 @@
 
 static void phys_map_node_reserve(PhysPageMap *map, unsigned nodes)
 {
+    static unsigned alloc_hint = 16;
     if (map->nodes_nb + nodes > map->nodes_nb_alloc) {
-        map->nodes_nb_alloc = MAX(map->nodes_nb_alloc * 2, 16);
+        map->nodes_nb_alloc = MAX(map->nodes_nb_alloc, alloc_hint);
         map->nodes_nb_alloc = MAX(map->nodes_nb_alloc, map->nodes_nb + nodes);
         map->nodes = g_renew(Node, map->nodes, map->nodes_nb_alloc);
+        alloc_hint = map->nodes_nb_alloc;
     }
 }