68 lines
2.2 KiB
Groff
68 lines
2.2 KiB
Groff
.\" $NetBSD: altmem.4,v 1.3 2009/05/27 19:23:59 snj Exp $
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.\"
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.\" Copyright (c) 2009 Jared D. McNeill <jmcneill@invisible.ca>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Neither the name of the author nor the names of any
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.\" contributors may be used to endorse or promote products derived
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.\" from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd March 11, 2009
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.Dt ALTMEM 4
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.Os
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.Sh NAME
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.Nm altmem
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.Nd Alternative memory disk driver
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.Sh SYNOPSIS
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.Cd "altmem* at altmemdev?"
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.Sh DESCRIPTION
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The
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.Nm
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driver enables use of physical memory that is normally inaccessible by the
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machine-dependent
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.Xr pmap 9
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as a swap device.
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.Pp
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When an alternative memory disk device is present, this device is generally
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preferred to hard disk-based swap space.
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See the
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.Xr swapctl 8
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and
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.Xr fstab 5
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man pages for instructions on how to assign priorities to swap devices.
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.Sh FILES
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.Bl -tag -width /dev/raltmemXX -compact
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.It Pa "/dev/altmem??"
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block mode alternative memory disk devices.
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.It Pa "/dev/raltmem??"
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raw mode alternative memory disk devices.
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.El
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.Sh SEE ALSO
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.Xr md 4 ,
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.Xr fstab 5 ,
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.Xr swapctl 8
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.Sh HISTORY
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The
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.Nm
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device driver appeared in
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.Nx 6.0 .
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.Sh AUTHORS
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.An Jared D. McNeill Aq jmcneill@NetBSD.org
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