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To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: linux-kernel@vger.kernel.org
Subject: Re: UP IO-APIC with ACPI table but no MP table?
In-Reply-To: <15529.39198.444056.901156@kim.it.uu.se.suse.lists.linux.kernel>
From: Andi Kleen <ak@suse.de>
Date: 02 Apr 2002 13:57:54 +0200
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Mikael Pettersson <mikpe@csd.uu.se> writes:

> Is it possible to get the kernel to recognise and utilise the
> chipset's IO-APIC if the BIOS has no MP table but does list the
> IO-APIC in the ACPI table(s)?

The new Intel ACPI implementation now merged into 2.5 should support 
this. Of course it may still not work on your particular BIOS.

> If it's possible, is it also meaningful to do this on UP?

Using the IO-APIC makes a lot of sense, because it is a much more
efficient interface to the interrupt controller.

-Andi
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