APIC error on CPU0: 00(40) APIC error on CPU0: 40(40)

[Mitchell Laks <mlaks@verizon.net>]

Hi,

I just set up a new server. It has an amd64 (3000+) chip on a asus K8V-X 
motherboard. I installed sarge with the 2.6.8-1-386 kernel

I set up a software raid 5 and noticed that as soon as I began resync of the 
raid i get errors filling the dmesg log:

APIC error on CPU0: 00(40) 
APIC error on CPU0: 40(40) 
APIC error on CPU0: 40(40) 
APIC error on CPU0: 40(40) 
... (... infinity of the last one)

I did 
dmesg -n 1 
to get some peace and quiet on the screen for the 2 day resync of the raid
and then when i rebooted the machine and started and mounted the raid and 
began to exercise it ( cp -a a ton of stuff to the raid) the errors began 
again.

I googled and saw a reference to this issue on the gentoo list with late 2.6.9 
kernels and saw the solution they posted of adding the boot option
"noapic". So I figured why not? 

So i rebooted with noapic, and indeed the APIC errors vanished.
I notice a new error message in dmesg though

spurious 8259A interrupt: IRQ7.

I post this here to ask if anyone knows what is going on here and can clarify 
the problems.

Thanks