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From: Mark Atkinson <atkin901@yahoo.com>
Date: Wed, 04 Nov 2009 14:36:46 -0800
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Subject: Re: 8.0RC2 amd64 - kernel panic running make buildworld
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Mark Atkinson wrote:
> Mark Atkinson wrote:
>> Kai Gallasch wrote:
>>> Am Wed, 04 Nov 2009 16:24:01 +0100
>>> schrieb Dag-Erling Smørgrav <des@des.no>:
>>>
>>>> Kai Gallasch <gallasch@free.de> writes:
>>>>> I installed 8.0RC2-amd64 on an 8-core opteron server a few days ago.
>>>>>
>>>>> When I try to do a make buildworld or make buildkernel the server
>>>>> reboots without any message left in the logs. The same happens
>>>>> when building bigger ports (for example ruby18 or perl58)
>>>> Could it be related to this?  What's your CPUID?
>>> Found this in dmesg. Is this the CPUID? "Id = 0x100f23"
>> That's generation 16 (0xf) model 2, stepping 3.   This errata apparently
>> only effects gen 15 (0xe) and some pre-release -- never released to
>> public (0xf).   I have the same processor in my system btw.
> 
> sorry for the double wrong posting.  I see several webpages refer to 15
> as f and 16 as f.  usr/ports/misc/cpuid refers to it as 15.
> 
> The pages referenced via the bugzilla entry in the commit refer to it as
>  0xf but between 32 and 63.   Does the model 2 correctly put us in the
> range in the commit 0x20 and 0x3f? (i.e. stepping is included?)

I'll answer my own question, no:

http://support.amd.com/us/Processor_TechDocs/25481.pdf

Although the some of the posts in

http://bugzilla.kernel.org/show_bug.cgi?id=11305

indicate any model < 0x40.  Someone must have actually narrowed the range.