FreeBSD virtual memory subsystem code
vm_pageout.h
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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
78extern u_long vm_page_max_user_wired;
79extern 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
91/*
92 * Exported routines.
93 */
94
95/*
96 * Signal pageout-daemon and wait for it.
97 */
98
99void vm_wait(vm_object_t obj);
101void vm_waitpfault(struct domainset *, int timo);
102void vm_wait_domain(int domain);
103void vm_wait_min(void);
104void vm_wait_severe(void);
105
106int vm_pageout_flush(vm_page_t *, int, int, int, int *, boolean_t *);
107void vm_pageout_oom(int shortage);
108
109void vm_swapout_run(void);
110void vm_swapout_run_idle(void);
111
112#endif /* _KERNEL */
113#endif /* _VM_VM_PAGEOUT_H_ */
int vm_pageout_page_count
Definition: vm_pageout.c:152
void vm_swapout_run(void)
Definition: vm_swapout.c:336
void vm_waitpfault(struct domainset *, int timo)
Definition: vm_page.c:3390
void vm_wait_severe(void)
Definition: vm_page.c:3221
int vm_wait_intr(vm_object_t obj)
Definition: vm_page.c:3343
void vm_swapout_run_idle(void)
Definition: vm_swapout.c:348
void vm_pageout_oom(int shortage)
Definition: vm_pageout.c:1903
void vm_wait_min(void)
Definition: vm_page.c:3206
u_long vm_page_max_user_wired
Definition: vm_pageout.c:204
int vm_pageout_flush(vm_page_t *, int, int, int, int *, boolean_t *)
Definition: vm_pageout.c:471
void vm_wait_domain(int domain)
Definition: vm_page.c:3284
void vm_wait(vm_object_t obj)
Definition: vm_page.c:3337