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SubjectRe: APIC error
From
HI,

On: Wed, 14 May 2003 14:55:37 +0200,
mikpe@csd.uu.se wrote:

> > Those errors only seem to happen during high disk-io (SCSI or IDE).
> > What specific meaning do those errors have? Are they dangerous?
>
> They are defined in Intel's IA32 manual set, volume 3,
> "System Programming Guide", downloadable from developer.intel.com.
>
> These errors mean that APIC bus messages are lost or have checksum errors.
> You don't say which kernel you're using or which chipset, but chances are
> your mobo's APIC bus is noisy.
>
> > Each CPU survives hours in memtest86 ... And with maxcpus=1 it also
> > does not seem to happen ... The BIOS is latest.
>
> You can try booting with "noapic", that should let you keep using SMP
> while avoiding your possibly buggy APIC bus.

Thanks for the anwer I googled for this before the mail but only found
much noise ... I'll triy noapic (I thought this would disable SMP,
too), but I already had to notice that with maxcpus=1 I also get some
few APIC errors.

Is there drawback in using noapic in SMP mode?

Sincerely,
René Rebe

--
René Rebe - Europe/Germany/Berlin
rene@rocklinux.org rene.rebe@gmx.net
http://www.rocklinux.org http://www.rocklinux.org/people/rene
http://gsmp.tfh-berlin.de/gsmp http://gsmp.tfh-berlin.de/rene

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