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SubjectRe: 2.2.14 SMP 3com905: transmit timed out: Odd lost irq and ip-stack lockup
On Fri, 13 Oct 2000, Andrew Morton wrote:

> "Maciej W. Rozycki" wrote:
> >
> > On Fri, 13 Oct 2000, Andrew Morton wrote:
> >
> > > > Oct 9 17:29:02 fwintern kernel: eth0: Interrupt posted but not
> > > > delivered -- IRQ blocked by another device?
> > >
> > > This is the infamous APIC bug. I have about ten reports of this over a
> > > four-month period. Mark Hemment mentioned it just yesterday.
> > >
> > > This is not a 3c59x problem. It is due to the APIC forgetting how to
> > > generate interrupts for a particular IRQ. It happens mostly for NICs
> > > because they generate a lot of interrupts. I've had it happen just
> > > once. In that case, _nothing_ would make the interrupt come back
> > > (including a driver unload/reload).
> > >
> > > This gets reported a lot by 3c59x users because this driver specifically
> > > detects and reports on the problem.
> >
> > Hmm, that's interesting. It would be worthwhile to see a dump of APICs'
> > state when this happens -- maybe an EOI message gets lost for some reason
> > or an erratum is biting us. There are functions for such kind of
> > diagnostics already available; they are print_IO_APIC() and
> > print_all_local_APICs() and may be called on demand by a tiny module, for
> > example.
>
> Thanks!
>
> Michael, would you be able to:
>
> - go back to 2.4.0

Back?

Sorry, this is a production system of a customer I cannot just update to a
completely new kernel possibly sacrificing all startup scripts /system
utilities and rather complex firewall setup. I'll see what I can do
though.

Compiling and running 2.4.0 is not the problem, I just don't know if it
will work with the 2.2.14 system utilities and libc (I had bad experiences
with such things in the past)

Michael.

--

Michael Weller: eowmob@exp-math.uni-essen.de, eowmob@ms.exp-math.uni-essen.de,
or even mat42b@spi.power.uni-essen.de. If you encounter an eowmob account on
any machine in the net, it's very likely it's me.

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