ALTMEM(4)               NetBSD Kernel Interfaces Manual              ALTMEM(4)

NAME
     altmem -- Alternative memory disk driver

SYNOPSIS
     altmem* at altmemdev?

DESCRIPTION
     The altmem driver enables use of physical memory that is normally inac-
     cessible by the machine-dependent pmap(9) as a swap device.

     When an alternative memory disk device is present, this device is gener-
     ally preferred to hard disk-based swap space.  See the swapctl(8) and
     fstab(5) man pages for instructions on how to assign priorities to swap
     devices.

FILES
     /dev/altmem??   block mode alternative memory disk devices.
     /dev/raltmem??  raw mode alternative memory disk devices.

SEE ALSO
     md(4), fstab(5), swapctl(8)

HISTORY
     The altmem device driver appeared in NetBSD 6.0.

AUTHORS
     Jared D. McNeill <jmcneill@NetBSD.org>

NetBSD 5.0                      March 11, 2009                      NetBSD 5.0