Re: [PATCH] Automatically enable bigsmp on big HP machines

From: Andi Kleen
Date: Thu Aug 05 2004 - 20:08:28 EST


On Thu, 5 Aug 2004 17:54:25 -0700
"Pallipadi, Venkatesh" <venkatesh.pallipadi@xxxxxxxxx> wrote:

>
>
> Instead of handling these individually for particular systems,
> can't we just switch to bigsmp whenever we see more than 8 CPU
> in the CPU enumeration and no other subarchitecture is selected by
> any dmi override.

This won't work on big AMD boxes I think. They don't have a XAPIC.

The other subarchitectures (es7000,summit) are usually selected using ACPI
OEM tablesnow, you would need to make sure that it happens after that.

Can you check that the there is really an XAPIC compatible APIC
somewhere in the system? (e.g. by reading the version number from the APIC?)
Then I guess it would be ok.

-Andi

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