Re: [announce] [patch] limiting IRQ load, irq-rewrite-2.4.11-B5

Alan Cox
2001-10-08T15:17:05Z

> On Mon, 8 Oct 2001, Alan Cox wrote:
>
> > NAPI is important - the irq disable tactic is a last resort. If the right
> > hardware is irq flood aware it should only ever trigger to save us from
> > irq routing errors (eg cardbus hangs)
>
> Agreed. As long as the IRQ flood protector can do proper isolation.
> Here's hat i see on my dell latitude laptop with a built in ethernet (not
> cardbus related ;->)

It doesnt save you from horrible performance. NAPI is there to do that, it
saves you from a dead box. You can at least rmmod the cardbus controller
with protection in place (or go looking for the problem with a debugger)