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Date:      Wed, 4 Sep 2002 17:28:42 -0700 (PDT)
From:      Doug White <dwhite@gumbysoft.com>
To:        Arnvid Karstad <arnvid@karstad.org>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: FreeBSD, SMP and Stepping.
Message-ID:  <20020904172718.L27143-100000@carver.gumbysoft.com>
In-Reply-To: <20020904202358.F72C.ARNVID@karstad.org>

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On Wed, 4 Sep 2002, Arnvid Karstad wrote:

> Hello,
>
> I was wondering a bit on how FreeBSD handled SMP systems where the cpu's
> aint 100% .. We have an SMP system that runs fine on Linux 2.2, but not
> 2.4 and is a bit curious on how this would be able to run under BSD...

Its probably a part of Intel's and your motherboard spec actually, but
generally SMP is only supported on CPUs of the same family and model.

At least recently, Intel says that all steppings of a particular model are
SMP-interoperable, but not of differing models.

> model           : 3
> model name      : Pentium II (Klamath)
> stepping        : 4

vs..

> model           : 5
> model name      : Pentium II (Deschutes)
> stepping        : 2


-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org


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