The following reply was made to PR port-i386/34186; it has been noted by GNATS.

From: Pavel Cahyna <pavel@netbsd.org>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: PR/34186 CVS commit: src/sys/arch/i386/i386
Date: Sat,  6 Jan 2007 15:29:02 +0000 (UTC)

 Module Name:	src
 Committed By:	pavel
 Date:		Sat Jan  6 15:29:02 UTC 2007
 
 Modified Files:
 	src/sys/arch/i386/i386: machdep.c pmap.c
 
 Log Message:
 PR port-i386/34186 by Wolfgang Stukenbrock:
 mapping of msgbuf during startup may map invalid physical adresses
 
 "If the last available physical memory segment on a system is less 16k,
 than the startup code that will map the kernel message buffer, will fail
 and map physical pages behind the last segment.  This may either only lead
 to a message buffer without physical memory behind it, or to an
 overlapping message buffer with something else."
 
 Fix by allowing multiple physical memory segments to be used for msgbuf.
 Also remove some leftover msgbuf manipulation from pmap.c.
 
 Fix supplied by Wolfgang Stukenbrock in the PR, with some modifications
 from me, mainly to use the already existing constant VM_PHYSSEG_MAX as the
 static limit of number of msgbuf segments.
 
 
 To generate a diff of this commit:
 cvs rdiff -r1.588 -r1.589 src/sys/arch/i386/i386/machdep.c
 cvs rdiff -r1.194 -r1.195 src/sys/arch/i386/i386/pmap.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.