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Re: How disable one of dual processors?

On Wed, 2005-06-01 at 16:04 -0300, Paulo Ricardo Paz Vital wrote:
> Hello fellows,
> I have a dual PowerMac G4 (described below in /proc/cpuinfo) and for a
> few months it has presenting some problems. When I am operating the
> machine, is presented in gkrellm that the processor #1 stops
> operating. This crash presents two different scenes: (1) the processor
> #1 stops but the processor #0  operates normally, supporting all
> amount of work; and (2) the two processors stops and I need reboot the
> machine.
> I'm using the kernel version 2.6.8 and this same problem occur in
> other kernel versions and in Mac OS X, too.
> Verifying /var/log/messages, I can see this anormal message: 
> ------------------------------------------------------------------------------------
> /var/log/messages:
> May 30 11:20:23 falcao kernel: Machine check in kernel mode.
> May 30 11:20:23 falcao kernel: Caused by (from SRR1=20009030): L1 Data
> Cache error
> ------------------------------------------------------------------------------------
> I did some searches using Google, but I didn't find a solution for
> this problem. I suppose disabling the processor #1, I can solve this
> problem. So, how can I disable one of my dual processors?? Or, how can
> I solve this problem :-D ??

Looks like one of your processors is indeed broken. Try booting with
maxcpus=1 on the kernel command line (and hope that's not CPU0 that is


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