bsd/conf/param.c

   1 /*
   2  * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_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 License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1980, 1986, 1989, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  * (c) UNIX System Laboratories, Inc.
  32  * All or some portions of this file are derived from material licensed
  33  * to the University of California by American Telephone and Telegraph
  34  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  35  * the permission of UNIX System Laboratories, Inc.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  * 1. Redistributions of source code must retain the above copyright
  41  *    notice, this list of conditions and the following disclaimer.
  42  * 2. Redistributions in binary form must reproduce the above copyright
  43  *    notice, this list of conditions and the following disclaimer in the
  44  *    documentation and/or other materials provided with the distribution.
  45  * 3. All advertising materials mentioning features or use of this software
  46  *    must display the following acknowledgement:
  47  *      This product includes software developed by the University of
  48  *      California, Berkeley and its contributors.
  49  * 4. Neither the name of the University nor the names of its contributors
  50  *    may be used to endorse or promote products derived from this software
  51  *    without specific prior written permission.
  52  *
  53  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  54  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  55  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  56  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  57  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  58  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  59  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  60  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  61  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  62  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  63  * SUCH DAMAGE.
  64  *
  65  *      @(#)param.c     8.3 (Berkeley) 8/20/94
  66  */
  67
  68 #include <sys/param.h>
  69 #include <sys/systm.h>
  70 #include <sys/socket.h>
  71 #include <sys/vnode_internal.h>
  72 #include <sys/file_internal.h>
  73 #include <sys/callout.h>
  74 #include <sys/clist.h>
  75 #include <sys/mbuf.h>
  76 #include <sys/domain.h>
  77 #include <sys/kernel.h>
  78 #include <sys/quota.h>
  79 #include <miscfs/fifofs/fifo.h>
  80 #include <sys/shm_internal.h>
  81 #include <sys/aio_kern.h>
  82
  83 struct  timezone tz = { 0, 0 };
  84
  85 #if CONFIG_EMBEDDED
  86 #define NPROC 1000          /* Account for TOTAL_CORPSES_ALLOWED by making this slightly lower than we can. */
  87 #define NPROC_PER_UID 950
  88 #else
  89 #define NPROC (20 + 16 * 32)
  90 #define NPROC_PER_UID (NPROC/2)
  91 #endif
  92
  93 /* NOTE: maxproc and hard_maxproc values are subject to device specific scaling in bsd_scale_setup */
  94 #define HNPROC 2500     /* based on thread_max */
  95 int     maxproc = NPROC;
  96 int     maxprocperuid = NPROC_PER_UID;
  97
  98 #if CONFIG_EMBEDDED
  99 int hard_maxproc = NPROC;       /* hardcoded limit -- for embedded the number of processes is limited by the ASID space */
 100 #else
 101 int hard_maxproc = HNPROC;      /* hardcoded limit */
 102 #endif
 103
 104 int nprocs = 0; /* XXX */
 105
 106 //#define       NTEXT (80 + NPROC / 8)                  /* actually the object cache */
 107 int desiredvnodes = 0;                          /* desiredvnodes is set explicitly in unix_startup.c */
 108 uint32_t kern_maxvnodes = 0;            /* global, to be read from the device tree */
 109
 110 #define MAXFILES (OPEN_MAX + 2048)
 111 int     maxfiles = MAXFILES;
 112
 113 unsigned int    ncallout = 16 + 2*NPROC;
 114 unsigned int nmbclusters = NMBCLUSTERS;
 115 int     nport = NPROC / 2;
 116
 117 /*
 118  *  async IO (aio) configurable limits
 119  */
 120 int aio_max_requests = CONFIG_AIO_MAX;
 121 int aio_max_requests_per_process = CONFIG_AIO_PROCESS_MAX;
 122 int aio_worker_threads = CONFIG_AIO_THREAD_COUNT;
 123
 124 /*
 125  * These have to be allocated somewhere; allocating
 126  * them here forces loader errors if this file is omitted
 127  * (if they've been externed everywhere else; hah!).
 128  */
 129 struct  callout *callout;
 130 struct  cblock *cfree;
 131 struct  cblock *cfreelist = NULL;
 132 int     cfreecount = 0;
 133 struct  buf *buf_headers;
 134 struct domains_head domains = TAILQ_HEAD_INITIALIZER(domains);