src/lib/libc/sys/madvise.2, branch release/4.1.0_cvs

This commit was manufactured by cvs2svn to create tag

2000-07-26T21:12:35+00:00

'RELENG_4_1_0_RELEASE'.

This commit was manufactured to restore the state of the 4.1-RELEASE image.
Releases prior to 5.3-RELEASE are omitting the secure/ and crypto/ subdirs.

MFC: introduce .Lb macro to libc manpages

2000-04-22T17:07:11+00:00

Add MAP_NOCORE to mmap(2), and MADV_NOCORE and MADV_CORE to madvise(2).

2000-02-28T04:10:35+00:00

This
This feature allows you to specify if mmap'd data is included in
an application's corefile.

Change the type of eflags in struct vm_map_entry from u_char to
vm_eflags_t (an unsigned int).

Reviewed by:	dillon,jdp,alfred
Approved by:	jkh

Add MAP_NOSYNC feature to mmap(), and MADV_NOSYNC and MADV_AUTOSYNC to

1999-12-12T03:19:33+00:00

    madvise().

    This feature prevents the update daemon from gratuitously flushing
    dirty pages associated with a mapped file-backed region of memory.  The
    system pager will still page the memory as necessary and the VM system
    will still be fully coherent with the filesystem.  Modifications made
    by other means to the same area of memory, for example by write(), are
    unaffected.  The feature works on a page-granularity basis.

    MAP_NOSYNC allows one to use mmap() to share memory between processes
    without incuring any significant filesystem overhead, putting it in
    the same performance category as SysV Shared memory and anonymous memory.

Reviewed by: julian, alc, dg

$Id$ -> $FreeBSD$

1999-08-28T00:22:10+00:00

Spelling nits.

1998-06-06T04:56:13+00:00

Pointed out by: Sue Blake

Fix a bunch of spelling errors.

1998-06-04T21:06:07+00:00

PR:		6856
Submitted by:	Josh Gilliam

Convert caddr_t --> void * for sys/mman.h functions.

1997-12-31T01:22:01+00:00

mlock, mmap, mprotect, msync, munlock, and munmap are defined by
POSIX as taking void *.  The const modifier has been added to
mlock, munlock, and mprotect as the standard dictates.

minherit comes from OpenBSD and has been updated to conform with
their recent change to void *.

madvise and mincore are not defined by POSIX, but their arguments
have been modified to be consistent with the POSIX-defined functions.
mincore takes a const pointer, but madvise does not due to the
MADV_FREE case.

Discussed with:	bde

Fixed formatting of the MADV_FREE flag description.

1997-12-30T05:17:33+00:00

Pointed out by:	bde

Revert $FreeBSD$ to $Id$

1997-02-22T15:12:41+00:00