Annotation of sys/conf/param.c, Revision 1.1.1.1
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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