f098dcded5
correspond to the commit log. It changed the maxswzone and maxbcache parameters from int to long, without changing the extern definitions in <sys/buf.h>. In fact it's a good thing it did not, because other parts of the system are not yet ready for this, and on large-memory sparc machines it causes severe filesystem damage if you try. The worst effect of the change was that the tunables controlling the above variables stopped working. These were necessary to allow such large sparc64 machines (with >12GB RAM) to boot, since sparc64 did not set a hard-coded upper limit on these parameters and they ended up overflowing an int, causing an infinite loop at boot in bufinit(). Reviewed by: mlaier
190 lines
5.5 KiB
C
190 lines
5.5 KiB
C
/*-
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* Copyright (c) 1980, 1986, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)param.c 8.3 (Berkeley) 8/20/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_param.h"
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#include "opt_maxusers.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <vm/vm_param.h>
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/*
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* System parameter formulae.
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*/
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#ifndef HZ
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# if defined(__amd64__) || defined(__i386__) || defined(__ia64__) || defined(__sparc64__)
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# define HZ 1000
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# else
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# define HZ 100
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# endif
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#endif
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#define NPROC (20 + 16 * maxusers)
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#ifndef NBUF
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#define NBUF 0
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#endif
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#ifndef MAXFILES
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#define MAXFILES (maxproc * 2)
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#endif
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int hz;
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int tick;
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int maxusers; /* base tunable */
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int maxproc; /* maximum # of processes */
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int maxprocperuid; /* max # of procs per user */
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int maxfiles; /* sys. wide open files limit */
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int maxfilesperproc; /* per-proc open files limit */
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int ncallout; /* maximum # of timer events */
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int nbuf;
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int nswbuf;
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int maxswzone; /* max swmeta KVA storage */
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int maxbcache; /* max buffer cache KVA storage */
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int maxpipekva; /* Limit on pipe KVA */
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u_long maxtsiz; /* max text size */
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u_long dfldsiz; /* initial data size limit */
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u_long maxdsiz; /* max data size */
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u_long dflssiz; /* initial stack size limit */
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u_long maxssiz; /* max stack size */
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u_long sgrowsiz; /* amount to grow stack */
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/*
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* These have to be allocated somewhere; allocating
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* them here forces loader errors if this file is omitted
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* (if they've been externed everywhere else; hah!).
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*/
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struct buf *swbuf;
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/*
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* Boot time overrides that are not scaled against main memory
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*/
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void
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init_param1(void)
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{
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hz = HZ;
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TUNABLE_INT_FETCH("kern.hz", &hz);
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tick = 1000000 / hz;
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#ifdef VM_SWZONE_SIZE_MAX
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maxswzone = VM_SWZONE_SIZE_MAX;
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#endif
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TUNABLE_INT_FETCH("kern.maxswzone", &maxswzone);
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#ifdef VM_BCACHE_SIZE_MAX
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maxbcache = VM_BCACHE_SIZE_MAX;
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#endif
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TUNABLE_INT_FETCH("kern.maxbcache", &maxbcache);
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maxtsiz = MAXTSIZ;
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TUNABLE_ULONG_FETCH("kern.maxtsiz", &maxtsiz);
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dfldsiz = DFLDSIZ;
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TUNABLE_ULONG_FETCH("kern.dfldsiz", &dfldsiz);
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maxdsiz = MAXDSIZ;
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TUNABLE_ULONG_FETCH("kern.maxdsiz", &maxdsiz);
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dflssiz = DFLSSIZ;
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TUNABLE_ULONG_FETCH("kern.dflssiz", &dflssiz);
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maxssiz = MAXSSIZ;
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TUNABLE_ULONG_FETCH("kern.maxssiz", &maxssiz);
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sgrowsiz = SGROWSIZ;
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TUNABLE_ULONG_FETCH("kern.sgrowsiz", &sgrowsiz);
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}
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/*
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* Boot time overrides that are scaled against main memory
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*/
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void
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init_param2(long physpages)
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{
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/* Base parameters */
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maxusers = MAXUSERS;
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TUNABLE_INT_FETCH("kern.maxusers", &maxusers);
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if (maxusers == 0) {
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maxusers = physpages / (2 * 1024 * 1024 / PAGE_SIZE);
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if (maxusers < 32)
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maxusers = 32;
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if (maxusers > 384)
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maxusers = 384;
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}
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/*
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* The following can be overridden after boot via sysctl. Note:
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* unless overriden, these macros are ultimately based on maxusers.
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*/
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maxproc = NPROC;
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TUNABLE_INT_FETCH("kern.maxproc", &maxproc);
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/*
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* Limit maxproc so that kmap entries cannot be exhausted by
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* processes.
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*/
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if (maxproc > (physpages / 12))
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maxproc = physpages / 12;
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maxfiles = MAXFILES;
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TUNABLE_INT_FETCH("kern.maxfiles", &maxfiles);
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maxprocperuid = (maxproc * 9) / 10;
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maxfilesperproc = (maxfiles * 9) / 10;
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/*
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* Cannot be changed after boot.
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*/
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nbuf = NBUF;
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TUNABLE_INT_FETCH("kern.nbuf", &nbuf);
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ncallout = 16 + maxproc + maxfiles;
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TUNABLE_INT_FETCH("kern.ncallout", &ncallout);
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}
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/*
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* Boot time overrides that are scaled against the kernel map
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*/
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void
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init_param3(long kmempages)
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{
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/*
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* The default for maxpipekva is max(5% of the kernel map, 512KB).
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* See sys_pipe.c for more details.
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*/
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maxpipekva = (kmempages / 20) * PAGE_SIZE;
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if (maxpipekva < 512 * 1024)
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maxpipekva = 512 * 1024;
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TUNABLE_INT_FETCH("kern.ipc.maxpipekva", &maxpipekva);
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}
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