Remove information about possibility of running out of KVA space, that was fixed some time ago.

share/man/man4/man4.amiga/mppb.4

@@ -1,4 +1,4 @@
-.\" $NetBSD: mppb.4,v 1.5 2012/04/22 12:23:22 rkujawa Exp $
+.\" $NetBSD: mppb.4,v 1.6 2012/09/16 17:16:18 rkujawa Exp $
 .\"
 .\" Copyright (c) 2011 The NetBSD Foundation, Inc.
 .\" All rights reserved.
@@ -27,7 +27,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 .\" POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd December 3, 2011
+.Dd September 16, 2012
 .Dt MPPB 4 amiga
 .Os
 .Sh NAME
@@ -49,11 +49,6 @@ driver supports the following hardware:
 .It Em PROMETHEUS
 Matay Prometheus. Manufacturer 44359, product 1.
 .El
-.Sh DIAGNOSTICS
-.Bl -diag
-.It Unable to allocate space in parent map.
-The kernel has run out of virtual memory space.
-.El
 .Sh SEE ALSO
 .Xr pci 4
 .Sh HISTORY
@@ -75,12 +70,3 @@ PCI card demands a retry of transaction, it returns value 0xFFFFFFFF.
 This is currently not handled by the
 .Nm
 driver and will confuse some PCI card drivers.
-.Pp
-The system may run out of kernel virtual memory space if Prometheus is present.
-This is due to fact that m68k-specific
-.Xr pmap 9
-code places User Page Table base address at statically defined address
-0x10000000, which does not leave enough kernel space to fit a 512MB board, such
-as the Prometheus.
-It is possible to work around this problem, by moving User Page Table base
-to higher address.