Re: problem on dell r610

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

On Tue, Nov 02, 2010 at 08:31:22PM +0100, Manuel Bouyer wrote:
> On Tue, Nov 02, 2010 at 07:32:31PM +0200, Jukka Ruohonen wrote:
> > [...]
> > This is specific to ACPI -- or more specifically, configuration of the Intel
> > APIC system through ACPI. Can someone clarify how and why Xen tries to use
> > "mpacpi" (or ACPI at all) without LAPIC?
> 
> NetBSD/Xen needs mpacpi to find the physical CPUs, and, I guess, to
> proper interrupt routings. But the lapic itself is entirely managed
> by the xen hypervisor and can't be acceded by the dom0 kenrel.

As it stands now, we need the local APIC to figure out the correct BSP and
APs. That is, the APIC ID of the designated BSP is not necessarily the
first one enumerated. The result of not doing this is seen in this thread
(provided that my analysis was correct, which it well may not be).

- Jukka.