.\" Copyright (c) 1991 Regents of the University of California.
.\" All rights reserved.
.\"
.\" %sccs.include.redist.man%
.\"
.\"	@(#)madvise.2	6.1 (Berkeley) 05/27/91
.\"
.TH MADVISE 2 ""
.UC 7
.SH NAME
madvise \- give advise about use of memory
.SH SYNOPSIS
.nf
madvise(addr, len, behav)
.B caddr_t addr;
.B int len, behav;
.fi
.SH DESCRIPTION
.PP
The \fImadvise\fP system call
allows a process that has knowledge of its memory behavior
to describe it to the system.
The known behaviors are given in \fI<sys/mman.h>\fP:
.DS
.ta \w'#define\ \ 'u +\w'MADV_SEQUENTIAL\ \ 'u +\w'00\ \ \ \ 'u
#define	MADV_NORMAL	0	/* no further special treatment */
#define	MADV_RANDOM	1	/* expect random page references */
#define	MADV_SEQUENTIAL	2	/* expect sequential references */
#define	MADV_WILLNEED	3	/* will need these pages */
#define	MADV_DONTNEED	4	/* don't need these pages */
#define	MADV_SPACEAVAIL	5	/* insure that resources are reserved */
.DE
.SH "SEE ALSO"
msync.2, munmap.2, mprotect.2, madvise.2, mincore.2