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Date:      Mon, 12 Sep 2005 14:37:13 -0600
From:      Scott Long <scottl@samsco.org>
To:        Mike Hunter <mhunter@ack.berkeley.edu>
Cc:        freebsd-amd64@freebsd.org
Subject:   Re: Problems with Nacona Xeons
Message-ID:  <4325E6F9.3020108@samsco.org>
In-Reply-To: <20050912203242.GA53403@malcolm.berkeley.edu>
References:  <BF49AB3E.1D52%webmaster@machowto.com> <43245C91.1090904@comcast.net> <4324697A.40301@samsco.org> <20050912203242.GA53403@malcolm.berkeley.edu>

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Mike Hunter wrote:
> On Sep 11, "Scott Long" wrote:
> 
> 
>>Sean wrote:
>>
>>>David S. Besade wrote:
> 
> 
>>>>I have a Dual Xeon (With EM64T) system running FreeBSD 5.4 AMD64 -
>>>>Release (with a -stable kernel). I can't get the kernel to see my
>>>>second CPU.  I have recompiled and retuned and done everything I could
>>>>to get it to see the second CPU. The guys on IRC (##Freebsd on
>>>>freenode) told me to post this to this list.
> 
> 
>>>>I do have the ACPI disabled as it doesn't work right yet. The
>>>>Motherboard is a Tyan S5350 (
>>>>http://tyan.com/products/html/tigeri7320.html ) running with 2 Dual
>>>>Nacona Core Xeons. I had the datacenter check the BIOS and everything
>>>>is as it should be. I have Registered ECC RAM on it as well.
> 
> 
>>>>Both CPU's were recogized by Centos 4.1 X86-64, however I prefer FBSD
>>>>to anything Linux. So if you guys could help me out I would appreciate
>>>>it. I think I have given you all the relevant information I Hope but
>>>>if not just ask me I will get it.
> 
> 
>>>You said you did a kernel recompile, so did you include
>>>'device        acpi'
>>
>>                 ^^^^
>>You need 'device apic' here also.  There is a difference between 'acpi'
>>and 'apic.  For SMP amd64 machines, you should have both.  Simply put,
>>the apic is what allows the first CPU to start up the other CPUs during
>>boot.
> 
> 
> I thought apic was "built in" to amd64...?
> 
> http://docs.freebsd.org/cgi/mid.cgi?20041208074109.GB35079

Gah!  You're right.  It's atpic that has to be explicitely included.
Sorry for the bad info.

Scott



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