Re: Network hang with 2.4.1-pre9 and 3c59x

Andrew Morton (andrewm@uow.edu.au)
Wed, 24 Jan 2001 11:40:26 +1100

John Roll wrote:
>
> Hi,
>
> I read about some problems with my ethernet card (3c59x) but it was rumored
> that they were fixed in 2.4.1-pre8. I have 6 IDE drives raided together and
> was stress testing the disk IO. Suddenly there was no network!
>
>
> ...
> Linux image.harvard.edu 2.4.1-pre9 #1 SMP Mon Jan 22 12:59:32 EST 2001 i686 unknown
>
> ...
> eth0: Interrupt posted but not delivered -- IRQ blocked by another device?

This is due to a lost APIC interrupt acknowledgement. A workaround
is to boot with the `noapic' LILO option.

This long-standing and very nasty problem was discussed extensively
a week or two ago. Suspicions were cast at the disable_irq() function
but I'm not sure anything 100% conclusive was arrived at.

I guess I'll have to find a way to make disable_irq() go away,
see if that helps.

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