1 /*- 2 * SPDX-License-Identifier: (BSD-3-Clause AND MIT-CMU) 3 * 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * The Mach Operating System project at Carnegie-Mellon University. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)vm_pageout.h 8.2 (Berkeley) 1/12/94 35 * 36 * 37 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 38 * All rights reserved. 39 * 40 * Author: Avadis Tevanian, Jr. 41 * 42 * Permission to use, copy, modify and distribute this software and 43 * its documentation is hereby granted, provided that both the copyright 44 * notice and this permission notice appear in all copies of the 45 * software, derivative works or modified versions, and any portions 46 * thereof, and that both notices appear in supporting documentation. 47 * 48 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 49 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 50 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 51 * 52 * Carnegie Mellon requests users of this software to return to 53 * 54 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 55 * School of Computer Science 56 * Carnegie Mellon University 57 * Pittsburgh PA 15213-3890 58 * 59 * any improvements or extensions that they make and grant Carnegie the 60 * rights to redistribute these changes. 61 * 62 * $FreeBSD$ 63 */ 64 65 #ifndef _VM_VM_PAGEOUT_H_ 66 #define _VM_VM_PAGEOUT_H_ 67 68 #ifdef _KERNEL 69 70 /* 71 * Header file for pageout daemon. 72 */ 73 74 /* 75 * Exported data structures. 76 */ 77 78 extern u_long vm_page_max_user_wired; 79 extern int vm_pageout_page_count; 80 81 #define VM_OOM_MEM 1 82 #define VM_OOM_MEM_PF 2 83 #define VM_OOM_SWAPZ 3 84 85 /* 86 * vm_lowmem flags. 87 */ 88 #define VM_LOW_KMEM 0x01 89 #define VM_LOW_PAGES 0x02 90 #define VM_LOW_MBUFS 0x04 91 92 /* 93 * Exported routines. 94 */ 95 96 /* 97 * Signal pageout-daemon and wait for it. 98 */ 99 100 void vm_wait(vm_object_t obj); 101 int vm_wait_intr(vm_object_t obj); 102 void vm_waitpfault(struct domainset *, int timo); 103 void vm_wait_domain(int domain); 104 void vm_wait_min(void); 105 void vm_wait_severe(void); 106 107 int vm_pageout_flush(vm_page_t *, int, int, int, int *, boolean_t *); 108 void vm_pageout_oom(int shortage); 109 110 void vm_swapout_run(void); 111 void vm_swapout_run_idle(void); 112 113 #endif /* _KERNEL */ 114 #endif /* _VM_VM_PAGEOUT_H_ */ 115