Re: [PATCH] genirq: handle_fasteoi_irq vs IRQ_INPROGRESS && IRQ_DISABLED

Jarek Poplawski
2007-08-21T10:34:35Z

On Tue, Aug 21, 2007 at 11:17:00AM +0200, Jarek Poplawski wrote:
>
> Hi,
>
> I've still some doubts about these irq handlers and I hope somebody
> could explain some of these (despite my problems with earlier such
> explanations, sorry...):
>
> 1. According to some well-known Intel's manual (vol.3A page 8-41)
> lapic can interrupt irq handler dispatching higher-priority irq; it
> seems, such an event is possible during handle_IRQ_event, and would
> be treated by "common" handlers with IRQ_INPROGRESS; but:

OOPS!!! Of course, I got this wrong again: this IRQ_INPROGRESS is
for another irq... Sorry!

But, then, it seems such IRQ_INPROGRESS shouldn't be possible at all
with properly working lapic? Or do I miss something...

Jarek P.