1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * The Mach Operating System project at Carnegie-Mellon University. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)vm_pageout.h 8.2 (Berkeley) 1/12/94 33 * 34 * 35 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 36 * All rights reserved. 37 * 38 * Author: Avadis Tevanian, Jr. 39 * 40 * Permission to use, copy, modify and distribute this software and 41 * its documentation is hereby granted, provided that both the copyright 42 * notice and this permission notice appear in all copies of the 43 * software, derivative works or modified versions, and any portions 44 * thereof, and that both notices appear in supporting documentation. 45 * 46 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 47 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 48 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 49 * 50 * Carnegie Mellon requests users of this software to return to 51 * 52 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 53 * School of Computer Science 54 * Carnegie Mellon University 55 * Pittsburgh PA 15213-3890 56 * 57 * any improvements or extensions that they make and grant Carnegie the 58 * rights to redistribute these changes. 59 * 60 * $FreeBSD: src/sys/vm/vm_pageout.h,v 1.26.2.1 2002/02/26 05:49:28 silby Exp $ 61 * $DragonFly: src/sys/vm/vm_pageout.h,v 1.8 2008/07/01 02:02:56 dillon Exp $ 62 */ 63 64 #ifndef _VM_VM_PAGEOUT_H_ 65 #define _VM_VM_PAGEOUT_H_ 66 67 #ifndef _VM_VM_PAGE_H_ 68 #include <vm/vm_page.h> 69 #endif 70 71 /* 72 * Header file for pageout daemon. 73 */ 74 75 /* 76 * Exported data structures. 77 */ 78 79 extern int vm_page_max_wired; 80 extern int vm_pages_needed; /* should be some "event" structure */ 81 extern int vm_pageout_pages_needed; 82 extern int vm_pageout_deficit; 83 extern int vm_page_free_hysteresis; 84 extern int vm_pageout_memuse_mode; 85 86 #define VM_PAGEOUT_ASYNC 0 87 #define VM_PAGEOUT_SYNC 1 88 #define VM_PAGEOUT_FORCE 2 89 90 /* 91 * Swap out requests 92 */ 93 #define VM_SWAP_NORMAL 1 94 #define VM_SWAP_IDLE 2 95 96 /* 97 * Exported routines. 98 */ 99 100 /* 101 * Signal pageout-daemon and wait for it. 102 */ 103 104 extern void pagedaemon_wakeup (void); 105 extern void vm_wait (int timo); 106 extern void vm_wait_pfault (void); 107 108 #ifdef _KERNEL 109 110 struct vm_map; 111 112 void vm_pageout_cluster (vm_page_t, vm_object_t); 113 int vm_pageout_flush (vm_page_t *, int, int); 114 int vm_pageout_clean (vm_page_t); 115 void vm_pageout_map_deactivate_pages(struct vm_map *map, vm_pindex_t limit); 116 117 #endif 118 119 #endif /* _VM_VM_PAGEOUT_H_ */ 120