1/*-
2 * SPDX-License-Identifier: (BSD-4-Clause AND MIT-CMU)
3 *
4 * Copyright (c) 1991 Regents of the University of California.
5 * All rights reserved.
6 * Copyright (c) 1994 John S. Dyson
7 * All rights reserved.
8 * Copyright (c) 1994 David Greenman
9 * All rights reserved.
10 * Copyright (c) 2005 Yahoo! Technologies Norway AS
11 * All rights reserved.
12 *
13 * This code is derived from software contributed to Berkeley by
14 * The Mach Operating System project at Carnegie-Mellon University.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 *    notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 *    notice, this list of conditions and the following disclaimer in the
23 *    documentation and/or other materials provided with the distribution.
24 * 3. All advertising materials mentioning features or use of this software
25 *    must display the following acknowledgement:
26 *	This product includes software developed by the University of
27 *	California, Berkeley and its contributors.
28 * 4. Neither the name of the University nor the names of its contributors
29 *    may be used to endorse or promote products derived from this software
30 *    without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * SUCH DAMAGE.
43 *
44 *
45 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
46 * All rights reserved.
47 *
48 * Authors: Avadis Tevanian, Jr., Michael Wayne Young
49 *
50 * Permission to use, copy, modify and distribute this software and
51 * its documentation is hereby granted, provided that both the copyright
52 * notice and this permission notice appear in all copies of the
53 * software, derivative works or modified versions, and any portions
54 * thereof, and that both notices appear in supporting documentation.
55 *
56 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
57 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
58 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
59 *
60 * Carnegie Mellon requests users of this software to return to
61 *
62 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
63 *  School of Computer Science
64 *  Carnegie Mellon University
65 *  Pittsburgh PA 15213-3890
66 *
67 * any improvements or extensions that they make and grant Carnegie the
68 * rights to redistribute these changes.
69 */
70
71#include <sys/param.h>
72#include <sys/systm.h>
73#include <sys/kernel.h>
74#include <sys/lock.h>
75#include <sys/mutex.h>
76#include <sys/proc.h>
77#include <sys/sysctl.h>
78#include <sys/vmmeter.h>
79
80#include <vm/vm.h>
81#include <vm/vm_param.h>
82#include <vm/vm_pageout.h>
83
84static int vm_swap_enabled = 0;
85SYSCTL_INT(_vm, VM_SWAPPING_ENABLED, swap_enabled, CTLFLAG_RD,
86    &vm_swap_enabled, 0,
87    "Enable entire process swapout");
88
89static int vm_swap_idle_enabled = 0;
90SYSCTL_INT(_vm, OID_AUTO, swap_idle_enabled, CTLFLAG_RD,
91    &vm_swap_idle_enabled, 0,
92    "Allow swapout on idle criteria");
93
94void
95vm_swapout_run(void)
96{
97}
98
99void
100vm_swapout_run_idle(void)
101{
102}
103
104void
105faultin(struct proc *p)
106{
107
108	PROC_LOCK_ASSERT(p, MA_OWNED);
109	if ((p->p_flag & P_INMEM) == 0)
110		panic("faultin: proc %p swapped out with NO_SWAPPING", p);
111}
112
113void
114swapper(void)
115{
116
117	for (;;)
118		tsleep(&proc0, PVM, "swapin", MAXSLP * hz);
119}
120