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SubjectRe: PCI MSI breaks when booting with nosmp
Pavel Machek wrote:
> On Mon 2008-04-21 20:45:05, Andi Kleen wrote:
>> Jesse Barnes <jbarnes@virtuousgeek.org> writes:
>>> Ok, I see this too on my desktop machine. It looks like we're not getting
>>> interrupts setup correctly in the nosmp case. Still digging through to see
>>> why though...
>> NoSMP disables the io-apic and a lot of modern systems don't work
>> without APIC.
>
> Are you sure? I still boot DOS on very recent boxes, and they seem to
> work. How can PC-compatible machine require an APIC?

The machine doesn't, but the drivers do. DOS likely doesn't use all
hardware.

-Andi


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