Re: SMP problem w/ pre5

From: Alan Cox (alan@lxorguk.ukuu.org.uk)
Date: Thu Apr 20 2000 - 05:56:44 EST


> ...changing IO-APIC physical APIC ID to 16 ...<0>Kernel panic: could not
> set ID!

That value seems wrong

> I talked to one of my NetBSD friends. Apparently there's only a 4 bit field
> for this stuff, and those guys have never seen a CPU wired to APIC ID 16
> before. What changed between 2.2.10 and 2.2.14 (and thus 2.3.x) that is
> causing my problem? Happy to test, debug, have serial console capabilities,
> etc.

We take the APIC values from the table in ROM and load them nowdays (the BIOS
isnt required to load working values and some dell boxen didnt which made bad
things occur). That sounds like your BIOS maybe triggering this

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