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
 63#ifndef _VM_VM_PAGEOUT_H_
 64#define _VM_VM_PAGEOUT_H_
 65
 66#ifdef _KERNEL
 67
 68/*
 69 *	Header file for pageout daemon.
 70 */
 71
 72/*
 73 *	Exported data structures.
 74 */
 75
 76extern u_long vm_page_max_user_wired;
 77extern int vm_pageout_page_count;
 78
 79#define	VM_OOM_MEM	1
 80#define	VM_OOM_MEM_PF	2
 81#define	VM_OOM_SWAPZ	3
 82
 83/*
 84 * vm_lowmem flags.
 85 */
 86#define	VM_LOW_KMEM	0x01
 87#define	VM_LOW_PAGES	0x02
 88#define	VM_LOW_MBUFS	0x04
 89
 90/*
 91 *	Exported routines.
 92 */
 93
 94/*
 95 *	Signal pageout-daemon and wait for it.
 96 */
 97
 98void vm_wait(vm_object_t obj);
 99int vm_wait_intr(vm_object_t obj);
100void vm_waitpfault(struct domainset *, int timo);
101void vm_wait_domain(int domain);
102void vm_wait_min(void);
103void vm_wait_severe(void);
104
105int vm_pageout_flush(vm_page_t *, int, int, int, int *, boolean_t *);
106void vm_pageout_oom(int shortage);
107
108void vm_swapout_run(void);
109void vm_swapout_run_idle(void);
110
111#endif /* _KERNEL */
112#endif	/* _VM_VM_PAGEOUT_H_ */