After reading this http://www.openbsd.org/cgi-bin/man.cgi?query=mpbios&apropos=0&sektion=0&manpa th=OpenBSD+Current&arch=i386&format=html I must say that for me it means that if you have crappy HW (in this case KVM) then you can encounter problems.
On Sun, Nov 1, 2009 at 4:29 AM, Chris Dukes <pak...@pr.neotoma.org> wrote: > On Sat, Oct 31, 2009 at 05:50:57PM -0600, Theo de Raadt wrote: >> > OpenBSD 4.5+ works if "mpbios" is disabled, more info here: >> > http://scie.nti.st/2009/10/4/running-openbsd-4-5-in-kvm-on-ubuntu-linux-9-04 >> >> OpenBSD 4.5 works on 99.9% of PCs out there with mpbios enabled, >> so KVM must have a really stupid bug. > > > > Something about the mpbios implementation on OpenBSD does not seem > right as disabling with 'bsd -c' does not have the same result as > building a kernel with mpbios0 disabled in the config. B That and > your 99.9% comment lead me to believe there is a bug in OpenBSD. > Given > 1) Per mpbios.c ACPI and a useable MPBIOS appear to be mutually exclusive > 2) New PCs are shipping with ACPI instead of APM > 3) GENERIC with mpbios enabled breaks on 0.1% of PCs. > I'm at a bit of a loss as to why mpbios is still enabled in GENERIC. > > > My memory of the brief discussion on the KVM mailing list was that > KVM/QEMU emulation of one of the instructions executed by going through > the mpbios code was mishandled. B If you'd like me to find the relevant > thread and forward it on to the mpbios maintainer, I'll gladly do so. > > Now to pragmatic considerations. > I understand and appreciate your mistrust of running OpenBSD under > a virtual machine emulator. > But there are folks like me that find it useful to be able to > hold a dog and pony show for a network and cluster design on a > laptop rather than an anvil case of laptops, switches, and routers. > > > -- > Chris Dukes
