make nkmempages dynamic based on memory. okay art@ from netbsd:

date: 2000/02/11 19:22:52;  author: thorpej;
Add some very simple code to auto-size the kmem_map.  We take the
amount of physical memory, divide it by 4, and then allow machine
dependent code to place upper and lower bounds on the size.  Export
the computed value to userspace via the new "vm.nkmempages" sysctl.

NKMEMCLUSTERS is now deprecated and will generate an error if you
attempt to use it.  The new option, should you choose to use it,
is called NKMEMPAGES, and two new options NKMEMPAGES_MIN and
NKMEMPAGES_MAX allow the user to configure the bounds in the kernel
config file.

1 files changed, 6 insertions, 7 deletions

diff --git a/sys/arch/vax/include/param.h b/sys/arch/vax/include/param.h
index 334a7611dcc..2cc57f257d8 100644
--- a/sys/arch/vax/include/param.h
+++ b/sys/arch/vax/include/param.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: param.h,v 1.20 2001/07/06 02:07:44 provos Exp $ */
+/*	$OpenBSD: param.h,v 1.21 2001/12/05 01:57:15 provos Exp $ */
 /*      $NetBSD: param.h,v 1.39 1999/10/22 21:14:34 ragge Exp $    */
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
@@ -125,12 +125,11 @@
 #endif	/* NMBCLUSTERS */
 
 /*
- * Size of kernel malloc arena in NBPG-sized logical pages
- */ 
-
-#ifndef NKMEMCLUSTERS
-#define	NKMEMCLUSTERS	(4096*1024/NBPG)
-#endif
+ * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
+ * logical pages.
+ */
+#define	NKMEMPAGES_MIN_DEFAULT	((4 * 1024 * 1024) >> PAGE_SHIFT)
+#define	NKMEMPAGES_MAX_DEFAULT	((4 * 1024 * 1024) >> PAGE_SHIFT)
 
 /*
  * Some macros for units conversion