param.c revision 1.50
1 /* $NetBSD: param.c,v 1.50 2005/12/21 10:57:22 yamt 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. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)param.c 7.20 (Berkeley) 6/27/91 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: param.c,v 1.50 2005/12/21 10:57:22 yamt Exp $"); 41 42 #include "opt_hz.h" 43 #include "opt_rtc_offset.h" 44 #include "opt_sysv.h" 45 #include "opt_sysvparam.h" 46 #include "opt_nmbclusters.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 #define CONFIG_FILE 72 #include "config_file.h" 73 74 /* 75 * System parameter formulae. 76 * 77 * This file is copied into each directory where we compile 78 * the kernel; it should be modified there to suit local taste 79 * if necessary. 80 * 81 * Compiled with -DHZ=xx -DRTC_OFFSET=x -DMAXUSERS=xx 82 */ 83 84 #ifdef TIMEZONE 85 #error TIMEZONE is an obsolete kernel option. 86 #endif 87 88 #ifdef DST 89 #error DST is an obsolete kernel option. 90 #endif 91 92 #ifndef RTC_OFFSET 93 #define RTC_OFFSET 0 94 #endif 95 96 #ifndef HZ 97 #define HZ 100 98 #endif 99 100 #ifndef MAXFILES 101 #define MAXFILES (3 * (NPROC + MAXUSERS) + 80) 102 #endif 103 104 int hz = HZ; 105 int tick = 1000000 / HZ; 106 /* can adjust 240ms in 60s */ 107 int tickadj = (240000 / (60 * HZ)) ? (240000 / (60 * HZ)) : 1; 108 int rtc_offset = RTC_OFFSET; 109 int maxproc = NPROC; 110 int desiredvnodes = NVNODE; 111 int maxfiles = MAXFILES; 112 int ncallout = 16 + NPROC; /* size of callwheel (rounded to ^2) */ 113 int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */ 114 115 /* 116 * Various mbuf-related parameters. These can also be changed at run-time 117 * with sysctl. 118 */ 119 int nmbclusters = NMBCLUSTERS; 120 121 #ifndef MBLOWAT 122 #define MBLOWAT 16 123 #endif 124 int mblowat = MBLOWAT; 125 126 #ifndef MCLLOWAT 127 #define MCLLOWAT 8 128 #endif 129 int mcllowat = MCLLOWAT; 130 131 /* 132 * Values in support of System V compatible shared memory. XXX 133 */ 134 #ifdef SYSVSHM 135 #ifndef SHMMAX 136 #define SHMMAX SHMMAXPGS /* shminit() performs a `*= PAGE_SIZE' */ 137 #endif 138 #ifndef SHMMIN 139 #define SHMMIN 1 140 #endif 141 #ifndef SHMMNI 142 #define SHMMNI 128 /* <64k, see IPCID_TO_IX in ipc.h */ 143 #endif 144 #ifndef SHMSEG 145 #define SHMSEG 128 146 #endif 147 #define SHMALL SHMMAXPGS 148 149 struct shminfo shminfo = { 150 SHMMAX, 151 SHMMIN, 152 SHMMNI, 153 SHMSEG, 154 SHMALL 155 }; 156 #endif 157 158 /* 159 * Values in support of System V compatible semaphores. 160 */ 161 #ifdef SYSVSEM 162 struct seminfo seminfo = { 163 SEMMAP, /* # of entries in semaphore map */ 164 SEMMNI, /* # of semaphore identifiers */ 165 SEMMNS, /* # of semaphores in system */ 166 SEMMNU, /* # of undo structures in system */ 167 SEMMSL, /* max # of semaphores per id */ 168 SEMOPM, /* max # of operations per semop call */ 169 SEMUME, /* max # of undo entries per process */ 170 SEMUSZ, /* size in bytes of undo structure */ 171 SEMVMX, /* semaphore maximum value */ 172 SEMAEM /* adjust on exit max value */ 173 }; 174 #endif 175 176 /* 177 * Values in support of System V compatible messages. 178 */ 179 #ifdef SYSVMSG 180 struct msginfo msginfo = { 181 MSGMAX, /* max chars in a message */ 182 MSGMNI, /* # of message queue identifiers */ 183 MSGMNB, /* max chars in a queue */ 184 MSGTQL, /* max messages in system */ 185 MSGSSZ, /* size of a message segment */ 186 /* (must be small power of 2 greater than 4) */ 187 MSGSEG /* number of message segments */ 188 }; 189 #endif 190 191 /* 192 * These control when and to what priority a process gets after a certain 193 * amount of CPU time expires. AUTONICETIME is in seconds. 194 * AUTONICEVAL is NOT offset by NZERO, i.e. it's between PRIO_MIN and PRIO_MAX. 195 */ 196 #ifndef AUTONICETIME 197 #define AUTONICETIME 0 /* disabled */ 198 #endif 199 200 #ifndef AUTONICEVAL 201 #define AUTONICEVAL 4 /* default + 4 */ 202 #endif 203 204 int autonicetime = AUTONICETIME; 205 int autoniceval = AUTONICEVAL; 206 207 /* 208 * Actual network mbuf sizes (read-only), for netstat. 209 */ 210 const int msize = MSIZE; 211 const int mclbytes = MCLBYTES; 212
Indexes created Tue Sep 23 07:09:52 GMT 2025