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

[Joe <joe@jretrading.com>]

In message <3kAQt-1ms-1@gated-at.bofh.it>, Mitchell Laks 
<mlaks@verizon.net> writes
> 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.
There is an Asrock (budget Asus) motherboard with a SiS chipset which 
has this problem, which is fixed by a BIOS upgrade. This may also be 
your solution.

IRQ7 on my system is the parallel port, and I think this is a known and 
unconnected minor bug. I think it is considered harmless.
--
Joe