+#ifndef DFLSSIZ
+#define DFLSSIZ (512*1024) /* initial stack size limit */
+#endif
+#ifndef MAXSSIZ
+#define MAXSSIZ MAXDSIZ /* max stack size */
+#endif
+
+/*
+ * Default sizes of swap allocation chunks (see dmap.h).
+ * The actual values may be changed in vminit() based on MAXDSIZ.
+ * With MAXDSIZ of 16Mb and NDMAP of 38, dmmax will be 1024.
+ * DMMIN should be at least ctod(1) so that vtod() works.
+ * vminit() ensures this.
+ */
+#define DMMIN 32 /* smallest swap allocation */
+#define DMMAX 4096 /* largest potential swap allocation */
+#define DMTEXT 1024 /* swap allocation for text */