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Date: Tue, 10 Jul 2001 17:57:08 +0200
From: Christoph Hellwig <hch@infradead.org>
To: Chris Wedgwood <cw@f00f.org>
Cc: "Randy.Dunlap" <rddunlap@osdlab.org>, linux-kernel@vger.kernel.org,
        hpa@zytor.com
Subject: Re: How many pentium-3 processors does SMP support?
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In-Reply-To: <20010711035038.A32188@weta.f00f.org>; from cw@f00f.org on Wed, Jul 11, 2001 at 03:50:38AM +1200
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On Wed, Jul 11, 2001 at 03:50:38AM +1200, Chris Wedgwood wrote:
> On Tue, Jul 10, 2001 at 08:26:09AM -0700, Randy.Dunlap wrote:
> 
>     I have heard of some IBM/Sequent patches that modify the
>     logical vs. physical APIC addressing scheme to make 16-way
>     systems work.
> 
> The Unisys machine is actually four quad-CPU machines with shared
> memory, dynamically configurable and other neat stuff.

If it is the Unisys design I mean it is done rather different.
The design I saw has two central crossbars and attached either CPU
modules with a GTL+ bus and two CPUs after a L3 cache or a IO
Module with a few (IIRC 3) PCI busses.

-- 
Of course it doesn't work. We've performed a software upgrade.
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