/* $NetBSD: kern_allocsys.c,v 1.18 2001/11/12 15:25:05 lukem Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Luke Mewburn. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /*- * Copyright (c) 1982, 1987, 1990 The Regents of the University of California. * All rights reserved. * * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. * */ #include __KERNEL_RCSID(0, "$NetBSD: kern_allocsys.c,v 1.18 2001/11/12 15:25:05 lukem Exp $"); #include "opt_bufcache.h" #include "opt_callout.h" #include "opt_sysv.h" #include #include #include #include #ifdef SYSVMSG #include #endif #ifdef SYSVSEM #include #endif #ifdef SYSVSHM #include #endif #include /* * Declare these as initialized data so we can patch them. */ #ifndef NBUF # define NBUF 0 #endif #ifndef BUFPAGES # define BUFPAGES 0 #endif #ifdef BUFCACHE # if (BUFCACHE < 5) || (BUFCACHE > 95) # error BUFCACHE is not between 5 and 95 # endif #else /* Default to 10% of first 2MB and 5% of remaining. */ # define BUFCACHE 0 #endif int nbuf = NBUF; int nswbuf = 0; int bufpages = BUFPAGES; /* optional hardwired count */ int bufcache = BUFCACHE; /* % of RAM to use for buffer cache */ /* * Allocate space for system data structures. We are given * a starting virtual address and we return a final virtual * address; along the way we set each data structure pointer. * * We call allocsys() with 0 to find out how much space we want, * allocate that much and fill it with zeroes, and then call * allocsys() again with the correct base virtual address. * */ caddr_t allocsys(caddr_t v, caddr_t (*mdcallback)(caddr_t)) { /* Calculate the number of callwheels if necessary. */ if (callwheelsize == 0) callout_setsize(); ALLOCSYS(v, callwheel, struct callout_queue, callwheelsize); #ifdef CALLWHEEL_STATS ALLOCSYS(v, callwheel_sizes, int, callwheelsize); #endif #ifdef SYSVSHM ALLOCSYS(v, shmsegs, struct shmid_ds, shminfo.shmmni); #endif #ifdef SYSVSEM ALLOCSYS(v, sema, struct semid_ds, seminfo.semmni); ALLOCSYS(v, sem, struct __sem, seminfo.semmns); /* This is pretty disgusting! */ ALLOCSYS(v, semu, int, (seminfo.semmnu * seminfo.semusz) / sizeof(int)); #endif #ifdef SYSVMSG ALLOCSYS(v, msgpool, char, msginfo.msgmax); ALLOCSYS(v, msgmaps, struct msgmap, msginfo.msgseg); ALLOCSYS(v, msghdrs, struct __msg, msginfo.msgtql); ALLOCSYS(v, msqids, struct msqid_ds, msginfo.msgmni); #endif /* * Determine how many buffers to allocate. * * - If bufcache is specified, use that % of memory * for the buffer cache. * * - Otherwise, we default to the traditional BSD * formula of 10% of the first 2MB and 5% of * the remaining. */ if (bufpages == 0) { if (bufcache != 0) { if (bufcache < 5 || bufcache > 95) panic("bufcache is out of range (%d)\n", bufcache); bufpages = physmem / 100 * bufcache; } else { if (physmem < btoc(2 * 1024 * 1024)) bufpages = physmem / 10; else bufpages = (btoc(2 * 1024 * 1024) + physmem) / 20; } } #ifdef DIAGNOSTIC if (bufpages == 0) panic("bufpages = 0\n"); #endif /* * Call the mdcallback now; it may need to adjust bufpages. */ if (mdcallback != NULL) v = mdcallback(v); /* * Ensure a minimum of 16 buffers. */ if (nbuf == 0) { nbuf = bufpages; if (nbuf < 16) nbuf = 16; } #ifdef VM_MAX_KERNEL_BUF /* * XXX stopgap measure to prevent wasting too much KVM on * the sparsely filled buffer cache. */ if (nbuf * MAXBSIZE > VM_MAX_KERNEL_BUF) nbuf = VM_MAX_KERNEL_BUF / MAXBSIZE; #endif /* * We allocate 1/2 as many swap buffer headers as file I/O buffers. */ if (nswbuf == 0) { nswbuf = (nbuf / 2) &~ 1; /* force even */ if (nswbuf > 256) nswbuf = 256; /* sanity */ } ALLOCSYS(v, buf, struct buf, nbuf); return (v); }