4.3BSD-Tahoe/usr/src/sys/h/vadvise.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)vadvise.h	7.1 (Berkeley) 6/4/86
 */

/*
 * Parameters to vadvise() to tell system of particular paging
 * behaviour:
 *	VA_NORM		Normal strategy
 *	VA_ANOM		Sampling page behaviour is not a win, don't bother
 *			Suitable during GCs in LISP, or sequential or random
 *			page referencing.
 *	VA_SEQL		Sequential behaviour expected.
 *	VA_FLUSH	Invalidate all page table entries.
 */
#define	VA_NORM	0
#define	VA_ANOM	1
#define	VA_SEQL	2
#define	VA_FLUSH 3