From: mjacob <mjacob@openbsd.org>
Date: Fri, 7 Apr 2000 21:05:05 +0000 (+0000)
Subject: Protect MAXPHYS against redefinition- this allows you to make a config
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=c9403fdacdeb8ef4c5d8ca5639db5c654a7acd99;p=openbsd

Protect MAXPHYS against redefinition- this allows you to make a config
option for increasing it to something reasonable for large I/O subsystems
(you get 22MB/s on some of the DataDirect RAID arrays at 64K, about 37MB/s
when you get go to 256KB transfers).
---

diff --git a/sys/arch/i386/include/param.h b/sys/arch/i386/include/param.h
index ed1128db081..6d32250764f 100644
--- a/sys/arch/i386/include/param.h
+++ b/sys/arch/i386/include/param.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: param.h,v 1.10 2000/02/22 19:27:48 deraadt Exp $	*/
+/*	$OpenBSD: param.h,v 1.11 2000/04/07 21:05:05 mjacob Exp $	*/
 /*	$NetBSD: param.h,v 1.29 1996/03/04 05:04:26 cgd Exp $	*/
 
 /*-
@@ -82,7 +82,9 @@
 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
 #define	DEV_BSIZE	(1 << DEV_BSHIFT)
 #define	BLKDEV_IOSIZE	2048
+#ifndef	MAXPHYS
 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
+#endif
 
 #define	CLSIZELOG2	0
 #define	CLSIZE		(1 << CLSIZELOG2)