79 lines
3.7 KiB
C
79 lines
3.7 KiB
C
/* $NetBSD: vmparam.h,v 1.22 1999/04/05 14:35:13 gwr Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef _SUN3_
|
|
#include <machine/vmparam3.h>
|
|
#endif /* SUN3 */
|
|
#ifdef _SUN3X_
|
|
#include <machine/vmparam3x.h>
|
|
#endif /* SUN3X */
|
|
|
|
/* This is needed by some LKMs. */
|
|
#define VM_PHYSSEG_MAX 4
|
|
struct pmap_physseg {
|
|
/* NULL */
|
|
};
|
|
|
|
/*
|
|
* The time for a process to be blocked before being very swappable.
|
|
* This is a number of seconds which the system takes as being a non-trivial
|
|
* amount of real time. You probably shouldn't change this;
|
|
* it is used in subtle ways (fractions and multiples of it are, that is, like
|
|
* half of a ``long time'', almost a long time, etc.)
|
|
* It is related to human patience and other factors which don't really
|
|
* change over time.
|
|
*/
|
|
#define MAXSLP 20
|
|
|
|
/*
|
|
* A swapped in process is given a small amount of core without being bothered
|
|
* by the page replacement algorithm. Basically this says that if you are
|
|
* swapped in you deserve some resources. We protect the last SAFERSS
|
|
* pages against paging and will just swap you out rather than paging you.
|
|
* Note that each process has at least UPAGES+CLSIZE pages which are not
|
|
* paged anyways (this is currently 8+2=10 pages or 5k bytes), so this
|
|
* number just means a swapped in process is given around 25k bytes.
|
|
* Just for fun: current memory prices are 4600$ a megabyte on VAX (4/22/81),
|
|
* so we loan each swapped in process memory worth 100$, or just admit
|
|
* that we don't consider it worthwhile and swap it out to disk which costs
|
|
* $30/mb or about $0.75.
|
|
* Update: memory prices have changed recently (9/96). At the current
|
|
* value of $6 per megabyte, we lend each swapped in process memory worth
|
|
* $0.15, or just admit that we don't consider it worthwhile and swap it out
|
|
* to disk which costs $0.20/MB, or just under half a cent.
|
|
*/
|
|
#define SAFERSS 4 /* nominal ``small'' resident set size
|
|
protected against replacement */
|