Re: [SOLVED] CPU too old panic on Centrino proc - 2.6.22.6

[Robby Workman <rw@rlworkman.net>]

Andi Kleen wrote:
> Robby Workman <rw@rlworkman.net> writes:
> 
>> On booting a 2.6.22.6 kernel with SMP support, I get a panic
>> immediately:
>>   PANIC: CPU too old for this kernel
>> This panic does not occur on a non-SMP kernel having almost
>> identical configuration.
>>
>> This is on a Thinkpad T41:
>>   /proc/cpuinfo --> http://rlworkman.net/cpuinfo
>>   dmesg --> http://rlworkman.net/dmesg
>>   kernel config --> http://rlworkman.net/config-2.6.22.6
>>
>> The 2.6.21.5 SMP kernels from Slackware 12.0 all boot properly, and
>> the config for this 2.6.22.6 SMP kernel is based on the one from 12.0.
>>
>> I'm basically reaching for clues at this point -- is this a PEBKAC on
>> my part?  What other information would be useful?
> 
> Most likely you enabled CONFIG_HIGHMEM64G. Banias didn't support 
> PAE.


Thanks, Andi - that was indeed the problem.  Of course, things like
this are never solved until asked about on a mailing list :)

HIGHMEM4G rather than HIGHMEM64G (not sure why I had that marked),
no PAE, and I was using the 64-bit memory/IO (EXPERIMENTAL).  Now it's
off.  A side effect was CONFIG_X86_CMPXCHG64 disappearing from the
.config, which I thought might have also been part of the problem
based on that other thread.

Either way, thanks for the response!

-RW