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Date:      Tue, 04 Feb 2003 14:28:34 -0500 (EST)
From:      John Baldwin <jhb@FreeBSD.org>
To:        Julian Elischer <julian@elischer.org>
Cc:        freebsd-smp@freebsd.org, Chris Luke <chrisy@flix.net>, Brendon and Wendy <brendy33@attbi.com>, Terry Lambert <tlambert2@mindspring.com>
Subject:   Re: mp_machdep.c patch
Message-ID:  <XFMail.20030204142834.jhb@FreeBSD.org>
In-Reply-To: <Pine.BSF.4.21.0302040057010.80424-100000@InterJet.elischer.org>

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On 04-Feb-2003 Julian Elischer wrote:
> 
> 
> On Mon, 3 Feb 2003, Terry Lambert wrote:
> 
>> 
>> You have to enable HT in the BIOS.  If it is not enabled in the
>> BIOS, it will not add entries to the MP Table for the virtual
>> processors, and they will not be recognized.
> 
> 
> My new MP systemm at work (soon to ship to a custommer.. (rats..))
> is running -stable as of today..
> even when I turn off Hyperthreading in the bios,
> FreeBSD still finds and uses the extra 2 CPUs..
> (i.e it looks as if it has 4 instead of 2)
> 
> Nothing I can do will force freeBSD to run with only 2 CPUs.

Correct, BIOS settings have no effect on whether or not
FreeBSD "sees" HTT CPUs.

-- 

John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/

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