param.c revision 1.38
1 /* $NetBSD: param.c,v 1.38 2001/08/20 04:51:17 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1986, 1989 Regents of the University of California. 5 * All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)param.c 7.20 (Berkeley) 6/27/91 41 */ 42 43 #include "opt_rtc_offset.h" 44 #include "opt_sb_max.h" 45 #include "opt_sysv.h" 46 #include "opt_sysvparam.h" 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/socket.h> 51 #include <sys/socketvar.h> 52 #include <sys/proc.h> 53 #include <sys/vnode.h> 54 #include <sys/file.h> 55 #include <sys/callout.h> 56 #include <sys/mbuf.h> 57 #include <ufs/ufs/quota.h> 58 #include <sys/kernel.h> 59 #include <sys/utsname.h> 60 #ifdef SYSVSHM 61 #include <machine/vmparam.h> 62 #include <sys/shm.h> 63 #endif 64 #ifdef SYSVSEM 65 #include <sys/sem.h> 66 #endif 67 #ifdef SYSVMSG 68 #include <sys/msg.h> 69 #endif 70 71 /* 72 * System parameter formulae. 73 * 74 * This file is copied into each directory where we compile 75 * the kernel; it should be modified there to suit local taste 76 * if necessary. 77 * 78 * Compiled with -DHZ=xx -DRTC_OFFSET=x -DMAXUSERS=xx 79 */ 80 81 #ifdef TIMEZONE 82 #error TIMEZONE is an obsolete kernel option. 83 #endif 84 85 #ifdef DST 86 #error DST is an obsolete kernel option. 87 #endif 88 89 #ifndef RTC_OFFSET 90 #define RTC_OFFSET 0 91 #endif 92 93 #ifndef HZ 94 #define HZ 100 95 #endif 96 97 #ifndef MAXFILES 98 #define MAXFILES (3 * (NPROC + MAXUSERS) + 80) 99 #endif 100 101 int hz = HZ; 102 int tick = 1000000 / HZ; 103 int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */ 104 int rtc_offset = RTC_OFFSET; 105 int maxproc = NPROC; 106 int desiredvnodes = NVNODE; 107 int maxfiles = MAXFILES; 108 int ncallout = 16 + NPROC; /* size of callwheel (rounded to ^2) */ 109 u_long sb_max = SB_MAX; /* maximum socket buffer size */ 110 int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */ 111 112 /* 113 * Various mbuf-related parameters. These can also be changed at run-time 114 * with sysctl. 115 */ 116 int nmbclusters = NMBCLUSTERS; 117 118 #ifndef MBLOWAT 119 #define MBLOWAT 16 120 #endif 121 int mblowat = MBLOWAT; 122 123 #ifndef MCLLOWAT 124 #define MCLLOWAT 8 125 #endif 126 int mcllowat = MCLLOWAT; 127 128 /* 129 * Values in support of System V compatible shared memory. XXX 130 */ 131 #ifdef SYSVSHM 132 #ifndef SHMMAX 133 #define SHMMAX SHMMAXPGS /* shminit() performs a `*= NBPG' */ 134 #endif 135 #ifndef SHMMIN 136 #define SHMMIN 1 137 #endif 138 #ifndef SHMMNI 139 #define SHMMNI 128 /* <= SHMMMNI in shm.h */ 140 #endif 141 #ifndef SHMSEG 142 #define SHMSEG 128 143 #endif 144 #define SHMALL SHMMAXPGS 145 146 struct shminfo shminfo = { 147 SHMMAX, 148 SHMMIN, 149 SHMMNI, 150 SHMSEG, 151 SHMALL 152 }; 153 #endif 154 155 /* 156 * Values in support of System V compatible semaphores. 157 */ 158 #ifdef SYSVSEM 159 struct seminfo seminfo = { 160 SEMMAP, /* # of entries in semaphore map */ 161 SEMMNI, /* # of semaphore identifiers */ 162 SEMMNS, /* # of semaphores in system */ 163 SEMMNU, /* # of undo structures in system */ 164 SEMMSL, /* max # of semaphores per id */ 165 SEMOPM, /* max # of operations per semop call */ 166 SEMUME, /* max # of undo entries per process */ 167 SEMUSZ, /* size in bytes of undo structure */ 168 SEMVMX, /* semaphore maximum value */ 169 SEMAEM /* adjust on exit max value */ 170 }; 171 #endif 172 173 /* 174 * Values in support of System V compatible messages. 175 */ 176 #ifdef SYSVMSG 177 struct msginfo msginfo = { 178 MSGMAX, /* max chars in a message */ 179 MSGMNI, /* # of message queue identifiers */ 180 MSGMNB, /* max chars in a queue */ 181 MSGTQL, /* max messages in system */ 182 MSGSSZ, /* size of a message segment */ 183 /* (must be small power of 2 greater than 4) */ 184 MSGSEG /* number of message segments */ 185 }; 186 #endif 187 188 /* 189 * These have to be allocated somewhere; allocating 190 * them here forces loader errors if this file is omitted 191 * (if they've been externed everywhere else; hah!). 192 */ 193 struct buf *buf; 194 char *buffers; 195 196 /* 197 * These control when and to what priority a process gets after a certain 198 * amount of CPU time expires. AUTONICETIME is in seconds. 199 * AUTONICEVAL is NOT offset by NZERO, i.e. it's between PRIO_MIN and PRIO_MAX. 200 */ 201 #ifndef AUTONICETIME 202 #define AUTONICETIME (60 * 10) /* 10 minutes */ 203 #endif 204 205 #ifndef AUTONICEVAL 206 #define AUTONICEVAL 4 /* default + 4 */ 207 #endif 208 209 int autonicetime = AUTONICETIME; 210 int autoniceval = AUTONICEVAL; 211 212 /* 213 * Actual network mbuf sizes (read-only), for netstat. 214 */ 215 const int msize = MSIZE; 216 const int mclbytes = MCLBYTES; 217
Indexes created Wed Sep 24 14:09:57 GMT 2025