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Date: Fri, 22 May 2009 13:12:03 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Cyrill Gorcunov <gorcunov@gmail.com>
CC: Rakib Mullick <rakib.mullick@gmail.com>, Ingo Molnar <mingo@elte.hu>,
       akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
       Yinghai Lu <yhlu.kernel@gmail.com>,
       "Maciej W. Rozycki" <macro@linux-mips.org>
Subject: Re: [PATCH] x86,APIC: Detect lapic_is_integrated() once - use on
 and on.
References: <b9df5fa10905220631y7b1a094dn9a6e13de1b9c43af@mail.gmail.com> <20090522200239.GD5354@lenovo>
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Cyrill Gorcunov wrote:
> 
> Hi Rakib,
> 
> actually this change could be dangerous. I don't
> remember if I saw mixed configuration at all but
> I would not be that sure that we will never met it.
> 
> Peter? Ingo? Yinghai? Maciej?
> 

That seems unlikely in the extreme.  To the best of my knowledge, only
486s ever used the external APICs.

	-hpa