FreeBSD/Linux Kernel Cross Reference
sys/sys/vadvise.h
1 /* $NetBSD: vadvise.h,v 1.10 2005/12/11 12:25:21 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1982, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * @(#)vadvise.h 8.1 (Berkeley) 6/2/93
32 */
33
34 #ifndef _SYS_VADVISE_H_
35 #define _SYS_VADVISE_H_
36
37 /*
38 * Parameters to vadvise() to tell system of particular paging
39 * behaviour:
40 * VA_NORM Normal strategy
41 * VA_ANOM Sampling page behaviour is not a win, don't bother
42 * Suitable during GCs in LISP, or sequential or random
43 * page referencing.
44 * VA_SEQL Sequential behaviour expected.
45 * VA_FLUSH Invalidate all page table entries.
46 */
47 #define VA_NORM 0
48 #define VA_ANOM 1
49 #define VA_SEQL 2
50 #define VA_FLUSH 3
51
52 #ifndef _KERNEL
53 __BEGIN_DECLS
54 int vadvise(int);
55 __END_DECLS
56 #endif
57
58 #endif /* !_SYS_VADVISE_H_ */
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