FreeBSD/Linux Kernel Cross Reference
sys/conf/param.c

     /*      $OpenBSD: param.c,v 1.47 2022/04/13 10:08:10 sthen Exp $        */
     /*      $NetBSD: param.c,v 1.16 1996/03/12 03:08:40 mrg Exp $   */
     
     /*
      * Copyright (c) 1980, 1986, 1989 Regents of the University of California.
      * All rights reserved.
      * (c) UNIX System Laboratories, Inc.
      * All or some portions of this file are derived from material licensed
      * to the University of California by American Telephone and Telegraph
     * Co. or Unix System Laboratories, Inc. and are reproduced herein with
     * the permission of UNIX System Laboratories, Inc.
     *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)param.c     7.20 (Berkeley) 6/27/91
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/socket.h>
    #include <sys/proc.h>
    #include <sys/vnode.h>
    #include <sys/file.h>
    #include <sys/timeout.h>
    #include <sys/mbuf.h>
    #include <ufs/ufs/quota.h>
    #include <sys/kernel.h>
    #include <sys/utsname.h>
    #ifdef SYSVSHM
    #include <machine/vmparam.h>
    #include <sys/shm.h>
    #endif
    #ifdef SYSVSEM
    #include <sys/sem.h>
    #endif
    #ifdef SYSVMSG
    #include <sys/msg.h>
    #endif
    
    /*
     * System parameter formulae.
     *
     * This file is copied into each directory where we compile
     * the kernel; it should be modified there to suit local taste
     * if necessary.
     *
     * Compiled with -DHZ=xx -DMAXUSERS=xx
     */
    
    #ifndef HZ
    #define HZ 100
    #endif
    int     hz = HZ;
    int     tick = 1000000 / HZ;
    int     tick_nsec = 1000000000 / HZ;
    int     utc_offset = 0;
    #define NPROCESS (30 + 16 * MAXUSERS)
    #define NTEXT (80 + NPROCESS / 8)               /* actually the object cache */
    #define NVNODE (NPROCESS * 2 + NTEXT + 100)
    int     initialvnodes = NVNODE;
    int     maxprocess = NPROCESS;
    int     maxthread = 2 * NPROCESS;
    int     maxfiles = 5 * (NPROCESS + MAXUSERS) + 80;
    long    nmbclust = NMBCLUSTERS;
    
    #ifndef MBLOWAT
    #define MBLOWAT         16
    #endif
    int     mblowat = MBLOWAT;
    
    #ifndef MCLLOWAT
    #define MCLLOWAT        8
    #endif
    int     mcllowat = MCLLOWAT;
    
    #ifndef BUFCACHEPERCENT
    #define BUFCACHEPERCENT 20
   #endif
   int     bufcachepercent = BUFCACHEPERCENT;
   
   #ifndef  BUFPAGES
   #define BUFPAGES        0
   #endif
   long     bufpages = BUFPAGES;
   
   int     fscale = FSCALE;        /* kernel uses `FSCALE', user uses `fscale' */
   
   /*
    * Values in support of System V compatible shared memory.      XXX
    */
   #ifdef SYSVSHM
   #define SHMMAX  SHMMAXPGS       /* shminit() performs a `*= PAGE_SIZE' */
   #define SHMMIN  1
   #define SHMMNI  128             /* <64k, see IPCID_TO_IX in ipc.h */
   #define SHMSEG  128
   #define SHMALL  (SHMMAXPGS)
   
   struct  shminfo shminfo = {
           SHMMAX,
           SHMMIN,
           SHMMNI,
           SHMSEG,
           SHMALL
   };
   #endif
   
   /*
    * Values in support of System V compatible semaphores.
    */
   #ifdef SYSVSEM
   struct  seminfo seminfo = {
           SEMMNI,         /* # of semaphore identifiers */
           SEMMNS,         /* # of semaphores in system */
           SEMMNU,         /* # of undo structures in system */
           SEMMSL,         /* max # of semaphores per id */
           SEMOPM,         /* max # of operations per semop call */
           SEMUME,         /* max # of undo entries per process */
           SEMUSZ,         /* size in bytes of undo structure */
           SEMVMX,         /* semaphore maximum value */
           SEMAEM          /* adjust on exit max value */
   };
   #endif
   
   /*
    * This has to be allocated somewhere; allocating
    * them here forces loader errors if this file is omitted
    * (if they've been externed everywhere else; hah!).
    */
   struct  utsname utsname;

Cache object: fe279bb5f2764299da178a1cc20c1e36