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Date:      Wed, 10 Oct 2001 17:09:08 -0700 (PDT)
From:      John Baldwin <jhb@FreeBSD.org>
To:        Torbjorn Granlund <tege@swox.com>
Cc:        doc@FreeBSD.org
Subject:   Re: Suggestion for FAQ
Message-ID:  <XFMail.011010170908.jhb@FreeBSD.org>
In-Reply-To: <86669nkr59.fsf@king.swox.se>

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On 10-Oct-01 Torbjorn Granlund wrote:
> John Baldwin <jhb@FreeBSD.org> writes:
> 
>   On 10-Oct-01 Torbjorn Granlund wrote:
>   > I'd suggest that some mention of Athlon SMP support is added to FAQ
>   > 3.31.  Perhaps:
>   > 
>   > "SMP currently only works for Intel(tm) hardware.  FreeBSD 5 will also
>   > support SMP for Athlon systems."
>   
>   FreeBSD 3.x and 4.x already support Athlon systems.  It's on the CD case
> for
>   4.4 and should be in the release notes if not already.  Appropriate wording
>   should probably be added to the FAQ as well.
>   
> You're not reading what I wrote, are you?  :-)

Um, yes. I did :)

> Athlon *SMP* systems are not supported, are they?
> While I haven't really tried it, the kernel sources for 4.4 clearly
> say only Intel SMP is supported.

Yes.  I've installed 4.x on an SMP athlon system.  It worked great.  The
Athlon's use a APIC just like Intel systems, so the SMP MD code is the same. 
Our existing SMP code just works out of the box, whcih is why I said 3.x would
probably work fine, too.

> FAQ 3.31 is about SMP support.  Since not all people read the source,
> a mention in the FAQ about Athlon SMP non-support would be a good
> idea.

s/non-support/support/, but yes I agree that it needs to be mentioned, just
that it be mentioned that it works fine. :)

> Since you seem to be busy hacking SMPng, perhaps you could answer this
> non-FAQ: I am about to get a new Athlon system replacing an older
> Athlon system, The new system will use Tyan Tiger 246x.  Any chance
> for -stable support for such a system (using both processors, that
> is!), or do I have to live on the edge and use -current?

It should work fine on 4.x if it works on 5.x.  The only SMP systems supported
on 5.x but not 4.x are SMP Alpha systems (as in the alpha architecture).

-- 

John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/
PGP Key: http://www.baldwin.cx/~john/pgpkey.asc
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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