How disable one of dual processors?

[Paulo Ricardo Paz Vital <pvital@gmail.com>]

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 ??

Thank you!!!

------------------------------------------------------------------------------------
/proc/cpuinfo:
processor       : 0
cpu             : 7455, altivec supported
clock           : 1249MHz
revision        : 3.3 (pvr 8001 0303)
bogomips        : 1249.28

processor       : 1
cpu             : 7455, altivec supported
clock           : 1249MHz
revision        : 3.3 (pvr 8001 0303)
bogomips        : 1249.28

total bogomips  : 2498.56
machine         : PowerMac3,6
motherboard     : PowerMac3,6 MacRISC2 MacRISC Power Macintosh
detected as     : 129 (PowerMac G4 Windtunnel)
pmac flags      : 00000000
L2 cache        : 256K unified
memory          : 1536MB
pmac-generation : NewWorld


-- 
[s]

Paulo Ricardo Paz Vital