RE: spurious 8259A interrupt

[Guennadi Liakhovetski]

On Tue, 23 Mar 2004, Maciej W. Rozycki wrote:

> On Tue, 23 Mar 2004, Guennadi Liakhovetski wrote:
>
> > Yes, I saw this your explanation. Thanks again. But, I am not getting
> > those errors with local APIC disabled. That's why I thought "local APIC ->
>
>  Is the local APIC normally disabled, i.e. do you see a message like:
> "Local APIC disabled by BIOS -- reenabling." when you boot with your local
> APIC enabled?  That might explain the difference.

Yes.

> what you observe.  As the local APIC latches edge-triggered interrupts it
> receives (unlike the 8259A) a glitch on an interrupt line does not have to
> last long enough for a CPU to accept it for a spurious interrupt to be
> recorded.

Ok, I'll buy it. And thanks for the explanations!

Guennadi
---
Guennadi Liakhovetski


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