Kernel panic problem in 2.4.7

Hello.. All

I have operated Redhat 6.2 based system(kernel 2.4.7) which is Dual CPU and 512M Ram.

A few days ago, this system is down and the messages like below.

Jul 22 14:57:45 www kernel: Kernel panic: CPU context corrupt
Jul 25 19:25:30 www kernel: Kernel panic: CPU context corrupt
Jul 27 23:43:22 www kernel: Kernel panic: CPU context corrupt

this mailling list say that this is CPU Problem(overclocking....but it isn't). So I changed other CPUs that I think no problem.

But a few days later. kernel panic occured again.
(The system is 2.4.7)
the messages was

Kernel panic:Aiee, killing interrupt handler

In interrupt handler - not syncing

This message is occured when the system's load average is a bit high. (When I Kernel compile or packing with tar.. somthing like that..)

I searched all lists, But I couldn't find the "reason" and "answer". I would like to know the reason and answer.

Please give me some advice about these problems.

Thanks for your help.

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