vm_pageout.h revision 32702
15455Sdg/* 21541Srgrimes * Copyright (c) 1991, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * This code is derived from software contributed to Berkeley by 61541Srgrimes * The Mach Operating System project at Carnegie-Mellon University. 71541Srgrimes * 81541Srgrimes * Redistribution and use in source and binary forms, with or without 91541Srgrimes * modification, are permitted provided that the following conditions 101541Srgrimes * are met: 111541Srgrimes * 1. Redistributions of source code must retain the above copyright 121541Srgrimes * notice, this list of conditions and the following disclaimer. 131541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141541Srgrimes * notice, this list of conditions and the following disclaimer in the 151541Srgrimes * documentation and/or other materials provided with the distribution. 161541Srgrimes * 3. All advertising materials mentioning features or use of this software 171541Srgrimes * must display the following acknowledgement: 181541Srgrimes * This product includes software developed by the University of 191541Srgrimes * California, Berkeley and its contributors. 201541Srgrimes * 4. Neither the name of the University nor the names of its contributors 211541Srgrimes * may be used to endorse or promote products derived from this software 221541Srgrimes * without specific prior written permission. 231541Srgrimes * 241541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 251541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 261541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 271541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 281541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 291541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 301541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 311541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 321541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 331541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 341541Srgrimes * SUCH DAMAGE. 351541Srgrimes * 361817Sdg * from: @(#)vm_pageout.h 8.2 (Berkeley) 1/12/94 371541Srgrimes * 381541Srgrimes * 391541Srgrimes * Copyright (c) 1987, 1990 Carnegie-Mellon University. 401541Srgrimes * All rights reserved. 411541Srgrimes * 421541Srgrimes * Author: Avadis Tevanian, Jr. 435455Sdg * 441541Srgrimes * Permission to use, copy, modify and distribute this software and 451541Srgrimes * its documentation is hereby granted, provided that both the copyright 461541Srgrimes * notice and this permission notice appear in all copies of the 471541Srgrimes * software, derivative works or modified versions, and any portions 481541Srgrimes * thereof, and that both notices appear in supporting documentation. 495455Sdg * 505455Sdg * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 515455Sdg * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 521541Srgrimes * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 535455Sdg * 541541Srgrimes * Carnegie Mellon requests users of this software to return to 551541Srgrimes * 561541Srgrimes * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 571541Srgrimes * School of Computer Science 581541Srgrimes * Carnegie Mellon University 591541Srgrimes * Pittsburgh PA 15213-3890 601541Srgrimes * 611541Srgrimes * any improvements or extensions that they make and grant Carnegie the 621541Srgrimes * rights to redistribute these changes. 631817Sdg * 6432702Sdyson * $Id: vm_pageout.h,v 1.22 1998/01/12 01:44:46 dyson Exp $ 651541Srgrimes */ 661541Srgrimes 672177Spaul#ifndef _VM_VM_PAGEOUT_H_ 682177Spaul#define _VM_VM_PAGEOUT_H_ 692177Spaul 701541Srgrimes/* 711541Srgrimes * Header file for pageout daemon. 721541Srgrimes */ 731541Srgrimes 741541Srgrimes/* 751541Srgrimes * Exported data structures. 761541Srgrimes */ 771541Srgrimes 787090Sbdeextern int vm_page_max_wired; 795455Sdgextern int vm_pages_needed; /* should be some "event" structure */ 801549Srgrimesextern int vm_pageout_pages_needed; 8132702Sdysonextern int vm_pageout_deficit; 821541Srgrimes 831549Srgrimes#define VM_PAGEOUT_ASYNC 0 841549Srgrimes#define VM_PAGEOUT_SYNC 1 851549Srgrimes#define VM_PAGEOUT_FORCE 2 861541Srgrimes 871541Srgrimes/* 8831563Sdyson * Swap out requests 8931563Sdyson */ 9031563Sdyson#define VM_SWAP_NORMAL 1 9131563Sdyson#define VM_SWAP_IDLE 2 9231563Sdyson 9331563Sdyson/* 941541Srgrimes * Exported routines. 951541Srgrimes */ 961541Srgrimes 971541Srgrimes/* 981541Srgrimes * Signal pageout-daemon and wait for it. 991541Srgrimes */ 1001541Srgrimes 10120007Sdysonextern void pagedaemon_wakeup __P((void)); 1021549Srgrimes#define VM_WAIT vm_wait() 10320007Sdysonextern void vm_wait __P((void)); 1041549Srgrimes 1051541Srgrimes#ifdef KERNEL 1065455Sdgvoid vm_pageout_page __P((vm_page_t, vm_object_t)); 1075455Sdgvoid vm_pageout_cluster __P((vm_page_t, vm_object_t)); 10812110Sdysonint vm_pageout_flush __P((vm_page_t *, int, int)); 10932454Sdysonvoid vm_pageout_page_free __P((vm_page_t)); 1105455Sdg 1111541Srgrimes#endif 1122177Spaul 1132177Spaul#endif 114