Annotation of sys/conf/param.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: param.c,v 1.27 2007/05/31 05:12:41 pedro Exp $ */
! 2: /* $NetBSD: param.c,v 1.16 1996/03/12 03:08:40 mrg Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1980, 1986, 1989 Regents of the University of California.
! 6: * All rights reserved.
! 7: * (c) UNIX System Laboratories, Inc.
! 8: * All or some portions of this file are derived from material licensed
! 9: * to the University of California by American Telephone and Telegraph
! 10: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
! 11: * the permission of UNIX System Laboratories, Inc.
! 12: *
! 13: * Redistribution and use in source and binary forms, with or without
! 14: * modification, are permitted provided that the following conditions
! 15: * are met:
! 16: * 1. Redistributions of source code must retain the above copyright
! 17: * notice, this list of conditions and the following disclaimer.
! 18: * 2. Redistributions in binary form must reproduce the above copyright
! 19: * notice, this list of conditions and the following disclaimer in the
! 20: * documentation and/or other materials provided with the distribution.
! 21: * 3. Neither the name of the University nor the names of its contributors
! 22: * may be used to endorse or promote products derived from this software
! 23: * without specific prior written permission.
! 24: *
! 25: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 26: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 27: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 28: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 29: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 30: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 31: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 32: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 33: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 34: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 35: * SUCH DAMAGE.
! 36: *
! 37: * @(#)param.c 7.20 (Berkeley) 6/27/91
! 38: */
! 39:
! 40: #include <sys/param.h>
! 41: #include <sys/systm.h>
! 42: #include <sys/socket.h>
! 43: #include <sys/proc.h>
! 44: #include <sys/vnode.h>
! 45: #include <sys/file.h>
! 46: #include <sys/timeout.h>
! 47: #include <sys/mbuf.h>
! 48: #include <ufs/ufs/quota.h>
! 49: #include <sys/kernel.h>
! 50: #include <sys/utsname.h>
! 51: #ifdef SYSVSHM
! 52: #include <machine/vmparam.h>
! 53: #include <sys/shm.h>
! 54: #endif
! 55: #ifdef SYSVSEM
! 56: #include <sys/sem.h>
! 57: #endif
! 58: #ifdef SYSVMSG
! 59: #include <sys/msg.h>
! 60: #endif
! 61:
! 62: /*
! 63: * System parameter formulae.
! 64: *
! 65: * This file is copied into each directory where we compile
! 66: * the kernel; it should be modified there to suit local taste
! 67: * if necessary.
! 68: *
! 69: * Compiled with -DHZ=xx -DTIMEZONE=x -DDST=x -DMAXUSERS=xx
! 70: */
! 71:
! 72: #ifndef TIMEZONE
! 73: # define TIMEZONE 0
! 74: #endif
! 75: #ifndef DST
! 76: # define DST 0
! 77: #endif
! 78: #ifndef HZ
! 79: #define HZ 100
! 80: #endif
! 81: int hz = HZ;
! 82: int tick = 1000000 / HZ;
! 83: int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */
! 84: struct timezone tz = { TIMEZONE, DST };
! 85: #define NPROC (20 + 16 * MAXUSERS)
! 86: #define NTEXT (80 + NPROC / 8) /* actually the object cache */
! 87: #define NVNODE (NPROC * 2 + NTEXT + 100)
! 88: int desiredvnodes = NVNODE;
! 89: int maxproc = NPROC;
! 90: int maxfiles = 3 * (NPROC + MAXUSERS) + 80;
! 91: int nmbclust = NMBCLUSTERS;
! 92:
! 93: #ifndef MBLOWAT
! 94: #define MBLOWAT 16
! 95: #endif
! 96: int mblowat = MBLOWAT;
! 97:
! 98: #ifndef MCLLOWAT
! 99: #define MCLLOWAT 8
! 100: #endif
! 101: int mcllowat = MCLLOWAT;
! 102:
! 103:
! 104: int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
! 105:
! 106: int shmseg = 8;
! 107: int shmmaxpgs = SHMMAXPGS;
! 108: /*
! 109: * Values in support of System V compatible shared memory. XXX
! 110: */
! 111: #ifdef SYSVSHM
! 112: #define SHMMAX SHMMAXPGS /* shminit() performs a `*= PAGE_SIZE' */
! 113: #define SHMMIN 1
! 114: #define SHMMNI 128 /* <64k, see IPCID_TO_IX in ipc.h */
! 115: #define SHMSEG 128
! 116: #define SHMALL (SHMMAXPGS)
! 117:
! 118: struct shminfo shminfo = {
! 119: SHMMAX,
! 120: SHMMIN,
! 121: SHMMNI,
! 122: SHMSEG,
! 123: SHMALL
! 124: };
! 125: #endif
! 126:
! 127: /*
! 128: * Values in support of System V compatible semaphores.
! 129: */
! 130: #ifdef SYSVSEM
! 131: struct seminfo seminfo = {
! 132: SEMMNI, /* # of semaphore identifiers */
! 133: SEMMNS, /* # of semaphores in system */
! 134: SEMMNU, /* # of undo structures in system */
! 135: SEMMSL, /* max # of semaphores per id */
! 136: SEMOPM, /* max # of operations per semop call */
! 137: SEMUME, /* max # of undo entries per process */
! 138: SEMUSZ, /* size in bytes of undo structure */
! 139: SEMVMX, /* semaphore maximum value */
! 140: SEMAEM /* adjust on exit max value */
! 141: };
! 142: #endif
! 143:
! 144: /*
! 145: * Values in support of System V compatible messages.
! 146: */
! 147: #ifdef SYSVMSG
! 148: struct msginfo msginfo = {
! 149: MSGMAX, /* max chars in a message */
! 150: MSGMNI, /* # of message queue identifiers */
! 151: MSGMNB, /* max chars in a queue */
! 152: MSGTQL, /* max messages in system */
! 153: MSGSSZ, /* size of a message segment */
! 154: /* (must be small power of 2 greater than 4) */
! 155: MSGSEG /* number of message segments */
! 156: };
! 157: #endif
! 158:
! 159: /*
! 160: * This has to be allocated somewhere; allocating
! 161: * them here forces loader errors if this file is omitted
! 162: * (if they've been externed everywhere else; hah!).
! 163: */
! 164: struct utsname utsname;
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