154 lines
4.2 KiB
C
154 lines
4.2 KiB
C
/* $NetBSD: param.c,v 1.70 2022/07/23 19:15:29 mrg Exp $ */
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/*
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* Copyright (c) 1980, 1986, 1989 Regents of the University of California.
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* All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)param.c 7.20 (Berkeley) 6/27/91
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: param.c,v 1.70 2022/07/23 19:15:29 mrg Exp $");
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#ifdef _KERNEL_OPT
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#include "opt_hz.h"
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#include "opt_rtc_offset.h"
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#include "opt_sysv.h"
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#include "opt_sysvparam.h"
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#include "opt_multiprocessor.h"
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#include "opt_maxlwp.h"
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#endif
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <sys/file.h>
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#include <sys/callout.h>
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#include <sys/mbuf.h>
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#include <ufs/ufs/quota.h>
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#include <sys/kernel.h>
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#include <sys/utsname.h>
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#include <sys/lwp.h>
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#ifdef SYSVSHM
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#include <machine/vmparam.h>
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#include <sys/shm.h>
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#endif
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#ifdef SYSVSEM
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#include <sys/sem.h>
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#endif
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#ifdef SYSVMSG
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#include <sys/msg.h>
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#endif
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/*
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* PCC cannot handle the 80KB string literal.
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*/
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#if !defined(__PCC__)
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#define CONFIG_FILE
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#include "config_file.h"
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#endif
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/*
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* System parameter formulae.
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*
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* This file is copied into each directory where we compile
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* the kernel; it should be modified there to suit local taste
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* if necessary.
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*
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* Compiled with -DHZ=xx -DRTC_OFFSET=x -DMAXUSERS=xx
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*/
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#ifdef TIMEZONE
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#error TIMEZONE is an obsolete kernel option.
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#endif
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#ifdef DST
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#error DST is an obsolete kernel option.
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#endif
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#ifndef RTC_OFFSET
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#define RTC_OFFSET 0
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#endif
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#ifndef HZ
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#define HZ 100
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#endif
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#ifndef MAXEXEC
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#define MAXEXEC 16
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#endif
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int hz = HZ;
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int tick = 1000000 / HZ;
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/* can adjust 240ms in 60s */
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int tickadj = (240000 / (60 * HZ)) ? (240000 / (60 * HZ)) : 1;
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int rtc_offset = RTC_OFFSET;
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int maxproc = NPROC;
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int maxlwp = MAXLWP;
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int desiredvnodes = NVNODE;
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u_int maxfiles = MAXFILES;
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int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
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int maxexec = MAXEXEC; /* max number of concurrent exec() calls */
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#ifdef MULTIPROCESSOR
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u_int maxcpus = MAXCPUS;
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size_t coherency_unit = COHERENCY_UNIT;
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#else
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u_int maxcpus = 1;
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size_t coherency_unit = ALIGNBYTES + 1;
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#endif
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/*
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* Various mbuf-related parameters. These can also be changed at run-time
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* with sysctl.
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*/
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int nmbclusters = 0;
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#ifndef MBLOWAT
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#define MBLOWAT 16
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#endif
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int mblowat = MBLOWAT;
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#ifndef MCLLOWAT
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#define MCLLOWAT 8
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#endif
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int mcllowat = MCLLOWAT;
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/*
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* Actual network mbuf sizes (read-only), for netstat.
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*/
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const int msize = MSIZE;
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const int mclbytes = MCLBYTES;
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