linux-kernel - Re: Debugging x86_64 apic & bootup problems on the Cray XD1

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Date:	12 Mar 2007 12:29:54 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Troy Benjegerdes <hozer@...ed.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Debugging x86_64 apic & bootup problems on the Cray XD1

Troy Benjegerdes <hozer@...ed.org> writes:

> I am attempting to make a 2.6.20 kernel boot on a Cray XD1 node with a
> Mellanox InfiniBand card installed, however both the ancient supplied
> cray 2.6.5 suse derivative, and a 2.6.20 kernel I just booted fail
> on APIC initialization.
> 
> Below is a diff of boot-up logs from a node without the mellanox IB
> card, and one with.. Does anyone have some pointers on debug options I
> should start turning on?

apic=debug

But most likely it's not related to the APICs anyways.

 Is there some way I can disable some of the
> memory regions in the infiniband card via some early PCI init code
> before APIC's are set up?

Sure, you can code anything. There isn't a standard way to do this
though.

-Andi
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