71 lines
2.3 KiB
Groff
71 lines
2.3 KiB
Groff
.\"
|
|
.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd July 17, 2014
|
|
.Dt PMAP_IS_MODIFIED 9
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pmap_is_modified ,
|
|
.Nm pmap_ts_modified
|
|
.Nd return information about physical pages
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In vm/vm.h
|
|
.In vm/pmap.h
|
|
.Ft boolean_t
|
|
.Fn pmap_is_modified "vm_page_t m"
|
|
.Ft int
|
|
.Fn pmap_ts_referenced "vm_page_t m"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn pmap_is_modified
|
|
and
|
|
.Fn pmap_ts_referenced
|
|
functions return information about physical pages.
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn pmap_is_modified
|
|
function returns the status of the
|
|
.Dq "page modified"
|
|
bit for the physical page
|
|
.Fa m .
|
|
.Pp
|
|
The
|
|
.Fn pmap_ts_referenced
|
|
function returns a count of reference bits for a page
|
|
.Fa m ,
|
|
clearing those bits.
|
|
It is not necessary for every reference bit to be cleared, but it is
|
|
necessary that 0 only be returned when there are no remaining reference
|
|
bits set on the page.
|
|
.Sh SEE ALSO
|
|
.Xr pmap 9 ,
|
|
.Xr pmap_clear_modify 9
|
|
.Sh AUTHORS
|
|
This manual page was written by
|
|
.An Bruce M Simpson Aq Mt bms@spc.org .
|