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

Alan Cox
2001-10-08T15:07:24Z

> I think (Ingo's?) analogy of an airbag was appropriate, if that's indeed
> how the code winds up functioning.

Very much so

"Driver killed because the air bag enable is off by default and only
mentioned on page 87 of the handbook in a footnote"

> Having a mechanism that prevents what would otherwise be a lockup is
> useful. NAPI is useful. Having both would be nice :)

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)