Re: v2.6.26-rc9: ACPI PCI irq routing on NUMA? + early_ioremaptrouble

From: Maciej W. Rozycki
Date: Fri Jul 18 2008 - 09:00:31 EST

On Fri, 18 Jul 2008, Vegard Nossum wrote:

> I have done this for the bad case:

Thanks. The MP table looks broken:

Bus #4 is ISA
I/O APIC #32 Version 32 at 0xFEC00000.
Int: type 3, pol 1, trig 1, bus 4, IRQ 00, APIC ID 2, APIC INT 00

etc. (notice the different I/O APIC IDs reported), so any changes to our
code are not at fault. I suggest you ask your vendor to fix it up (did
they test it at all? -- it has no chance to work) or stick to ACPI (I can
see it has been automatically disabled for some reason).

Anyway, the piece of I/O APIC code in question should not poke at the
local APIC, so I'll prepare a fix to make it check for the APIC ID being

> (I added a warning for certain APIC errors as well. Not that it adds
> much in this particular case, but I think it would be good to have in
> mainline anyway, to highlight these error cases in the future...)

It might be useful indeed.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at