Re: PCI MSI breaks when booting with nosmp

[Andi Kleen]

Pavel Machek wrote:
> On Mon 2008-04-21 20:45:05, Andi Kleen wrote:
>> Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> 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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