1/*
2 * Copyright (c) 1980, 1986, 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)param.c 8.3 (Berkeley) 8/20/94
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39 * $Id: param.c,v 1.29 1998/06/30 21:25:35 phk Exp $
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| 39 * $Id: param.c,v 1.30 1998/07/11 13:06:38 bde Exp $ |
40 */
41
42#include "opt_sysvipc.h"
43#include "opt_param.h"
44
45#include <sys/param.h>
46
47#ifdef SYSVSHM
48#include <machine/vmparam.h>
49#include <sys/shm.h>
50#endif
51#ifdef SYSVSEM
52#include <sys/sem.h>
53#endif
54#ifdef SYSVMSG
55#include <sys/msg.h>
56#endif
57
58/*
59 * System parameter formulae.
60 *
61 * This file is copied into each directory where we compile
62 * the kernel; it should be modified there to suit local taste
63 * if necessary.
64 *
65 * Compiled with -DMAXUSERS=xx
66 */
67
68#ifndef HZ
69#define HZ 100
70#endif
71int hz = HZ;
72int tick = 1000000 / HZ;
73int tickadj = howmany(30000, 60 * HZ); /* can adjust 30ms in 60s */
74#define NPROC (20 + 16 * MAXUSERS)
75#define MAXFILES (NPROC*2)
76int maxproc = NPROC; /* maximum # of processes */
77int maxprocperuid = NPROC-1; /* maximum # of processes per user */
78int maxfiles = MAXFILES; /* system wide open files limit */
79int maxfilesperproc = MAXFILES; /* per-process open files limit */
80int ncallout = 16 + NPROC + MAXFILES; /* maximum # of timer events */
81
82/* maximum # of mbuf clusters */
83#ifndef NMBCLUSTERS
84#define NMBCLUSTERS (512 + MAXUSERS * 16)
85#endif
86int nmbclusters = NMBCLUSTERS;
87
88#if MAXFILES > NMBCLUSTERS
89#define MAXSOCKETS MAXFILES
90#else
91#define MAXSOCKETS NMBCLUSTERS
92#endif
93int maxsockets = MAXSOCKETS;
94
95/* allocate 1/4th amount of virtual address space for mbufs XXX */
96int nmbufs = NMBCLUSTERS * 4;
97
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98/* maximum # of sf_bufs (sendfile(2) zero-copy virtual buffers) */
99#ifndef NSFBUFS
100#define NSFBUFS (512 + MAXUSERS * 16)
101#endif
102int nsfbufs = NSFBUFS;
103 |
104/*
105 * Values in support of System V compatible shared memory. XXX
106 */
107#ifdef SYSVSHM
108#ifndef SHMMAX
109#define SHMMAX (SHMMAXPGS*PAGE_SIZE)
110#endif
111#ifndef SHMMIN
112#define SHMMIN 1
113#endif
114#ifndef SHMMNI
115#define SHMMNI 32 /* <= SHMMMNI in shm.h */
116#endif
117#ifndef SHMSEG
118#define SHMSEG 8
119#endif
120#ifndef SHMALL
121#define SHMALL (SHMMAXPGS)
122#endif
123
124struct shminfo shminfo = {
125 SHMMAX,
126 SHMMIN,
127 SHMMNI,
128 SHMSEG,
129 SHMALL
130};
131#endif
132
133/*
134 * Values in support of System V compatible semaphores.
135 */
136
137#ifdef SYSVSEM
138
139struct seminfo seminfo = {
140 SEMMAP, /* # of entries in semaphore map */
141 SEMMNI, /* # of semaphore identifiers */
142 SEMMNS, /* # of semaphores in system */
143 SEMMNU, /* # of undo structures in system */
144 SEMMSL, /* max # of semaphores per id */
145 SEMOPM, /* max # of operations per semop call */
146 SEMUME, /* max # of undo entries per process */
147 SEMUSZ, /* size in bytes of undo structure */
148 SEMVMX, /* semaphore maximum value */
149 SEMAEM /* adjust on exit max value */
150};
151#endif
152
153/*
154 * Values in support of System V compatible messages.
155 */
156
157#ifdef SYSVMSG
158
159struct msginfo msginfo = {
160 MSGMAX, /* max chars in a message */
161 MSGMNI, /* # of message queue identifiers */
162 MSGMNB, /* max chars in a queue */
163 MSGTQL, /* max messages in system */
164 MSGSSZ, /* size of a message segment */
165 /* (must be small power of 2 greater than 4) */
166 MSGSEG /* number of message segments */
167};
168#endif
169
170/*
171 * These may be set to nonzero here or by patching.
172 * If they are nonzero at bootstrap time then they are
173 * initialized to values dependent on the memory size.
174 */
175#ifdef NBUF
176int nbuf = NBUF;
177#else
178int nbuf = 0;
179#endif
180int nswbuf = 0;
181
182/*
183 * These have to be allocated somewhere; allocating
184 * them here forces loader errors if this file is omitted
185 * (if they've been externed everywhere else; hah!).
186 */
187struct buf *swbuf;
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