netbsd man page for altmem

ALTMEM(4)						   BSD 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 inaccessible by the machine-dependent pmap(9) as a swap device.

     When an alternative memory disk device is present, this device is generally 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>

BSD
								  March 11, 2009							       BSD