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/alpha/include/param.h b/sys/arch/alpha/include/param.h
index 611d1dbcff7..d291e572cbb 100644
--- a/sys/arch/alpha/include/param.h
+++ b/sys/arch/alpha/include/param.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: param.h,v 1.20 2001/05/05 20:56:31 art Exp $ */
+/* $OpenBSD: param.h,v 1.21 2001/12/05 01:57:14 provos Exp $ */
 /* $NetBSD: param.h,v 1.30 2000/06/09 16:03:04 thorpej Exp $ */
 
 /*
@@ -122,12 +122,11 @@
 #endif
 
 /*
- * Size of kernel malloc arena in CLBYTES-sized logical pages
- */ 
-#ifndef NKMEMCLUSTERS
-#define NKMEMCLUSTERS	(32768*1024/NBPG)
-#endif
-
+ * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
+ * logical pages.
+ */
+#define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
+#define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
 
 /* pages ("clicks") to disk blocks */
 #define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))