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SubjectRe: Network hang with 2.4.1-pre9 and 3c59x
On Wed, 24 Jan 2001, Andrew Morton wrote:

> 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.

Not sure if that is 100% conclusive but I decided to develop an APIC
lockup recovery procedure. Fortunately chips provide us enough
information we may deal with the problem with moderate pain.

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

Please don't. This would be hiding problems under a carpet.

+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+ e-mail:, PGP key available +

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