Re: [tip:x86/urgent] x86, apic: Map the local apic when parsing the MP table.

From: Eric W. Biederman
Date: Fri Aug 06 2010 - 22:49:19 EST

Yinghai Lu <yinghai@xxxxxxxxxx> writes:

> On 08/06/2010 06:21 PM, H. Peter Anvin wrote:
>> On 08/06/2010 06:08 PM, Eric W. Biederman wrote:
>>>> I'm not sure the above is decipherable. Please provide an incremental
>>>> patch with a more detailed description.
>>> YH was saying I overoptimized, and it looks like he is right,
>>> although there are only one or two machines in existence that
>>> are likely to be affected.
>>> Untested patch to remove the cleverness below. It it boots all
>>> is well.
>> This makes sense to me. Yinghai, do you have a system that is actually
>> affected, and if so, could you test this patch?
> no, i don't have those kind of system.

I don't know if anyone does. It looks like sfi aka moorestown
and visws are what are affected.

That is why I made a patch that any boot where we exercise a local
apic will exercise.

Arguably if it is best to just remove that hunk from my patch, so
we have something that is safe to backport to

> found it when i was preparing more smp_register_lapic_address patcheset.
> I suggest we still keep !acpi_lapic checking, that should always right.

Ultimately we want to remove the code duplication entirely.

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