bsd/conf/param.c

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Copyright (c) 1980, 1986, 1989, 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  * (c) UNIX System Laboratories, Inc.
  34  * All or some portions of this file are derived from material licensed
  35  * to the University of California by American Telephone and Telegraph
  36  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  37  * the permission of UNIX System Laboratories, Inc.
  38  *
  39  * Redistribution and use in source and binary forms, with or without
  40  * modification, are permitted provided that the following conditions
  41  * are met:
  42  * 1. Redistributions of source code must retain the above copyright
  43  *    notice, this list of conditions and the following disclaimer.
  44  * 2. Redistributions in binary form must reproduce the above copyright
  45  *    notice, this list of conditions and the following disclaimer in the
  46  *    documentation and/or other materials provided with the distribution.
  47  * 3. All advertising materials mentioning features or use of this software
  48  *    must display the following acknowledgement:
  49  *      This product includes software developed by the University of
  50  *      California, Berkeley and its contributors.
  51  * 4. Neither the name of the University nor the names of its contributors
  52  *    may be used to endorse or promote products derived from this software
  53  *    without specific prior written permission.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  56  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  57  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  58  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  59  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  60  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  61  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  62  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  63  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  64  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  65  * SUCH DAMAGE.
  66  *
  67  *      @(#)param.c     8.3 (Berkeley) 8/20/94
  68  */
  69
  70 #include <confdep.h>
  71 #include <sys/param.h>
  72 #include <sys/systm.h>
  73 #include <sys/socket.h>
  74 #include <sys/vnode_internal.h>
  75 #include <sys/file_internal.h>
  76 #include <sys/callout.h>
  77 #include <sys/clist.h>
  78 #include <sys/mbuf.h>
  79 #include <sys/domain.h>
  80 #include <sys/kernel.h>
  81 #include <sys/quota.h>
  82 #include <ufs/ufs/inode.h>
  83 #include <miscfs/fifofs/fifo.h>
  84 #include <sys/shm_internal.h>
  85 #include <sys/aio_kern.h>
  86
  87 struct  timezone tz = { TIMEZONE, PST };
  88
  89 #define NPROC (20 + 16 * MAXUSERS)
  90 #define HNPROC (20 + 64 * MAXUSERS)
  91 int     maxproc = NPROC;
  92 __private_extern__ int hard_maxproc = HNPROC;   /* hardcoded limit */
  93 int nprocs = 0; /* XXX */
  94
  95 #define NTEXT (80 + NPROC / 8)                  /* actually the object cache */
  96 #define NVNODE (NPROC + NTEXT + 300)
  97 int     desiredvnodes = NVNODE + 700;
  98
  99 #define MAXFILES (OPEN_MAX + 2048)
 100 int     maxfiles = MAXFILES;
 101
 102 unsigned int    ncallout = 16 + 2*NPROC;
 103 int nmbclusters = NMBCLUSTERS;
 104 int     nport = NPROC / 2;
 105
 106 #define MAXSOCKETS NMBCLUSTERS
 107 int     maxsockets = MAXSOCKETS;
 108
 109 /*
 110  *  async IO (aio) configurable limits
 111  */
 112 #define AIO_MAX                         90      /* system wide limit of async IO requests */
 113 #define AIO_PROCESS_MAX         AIO_LISTIO_MAX  /* process limit of async IO requests */
 114 #define AIO_THREAD_COUNT        4       /* number of async IO worker threads created */
 115 int aio_max_requests = AIO_MAX;
 116 int aio_max_requests_per_process = AIO_PROCESS_MAX;
 117 int aio_worker_threads = AIO_THREAD_COUNT;
 118
 119 /*
 120  * These have to be allocated somewhere; allocating
 121  * them here forces loader errors if this file is omitted
 122  * (if they've been externed everywhere else; hah!).
 123  */
 124 struct  callout *callout;
 125 struct  cblock *cfree;
 126 struct  cblock *cfreelist = 0;
 127 int     cfreecount = 0;
 128 struct  buf *buf;
 129 struct  domain *domains;
 130