Re: PCI, ACPI, IRQ, IOAPIC: reroute PCI interrupt to legacy bootinterrupt equivalent

[Ingo Molnar]

* Stefan Assmann <sassmann@xxxxxxx> wrote:

> Why can these IRQ lines be brought down by Boot Interrupts? Because 
> there's no handler installed on the primary IO-APIC IRQ line that can 
> take care of them and after too many unhandled IRQs the line will be 
> shut down by the kernel.

The failure mode can be quite nasty: ranging from non-working USB (and 
other) devices to hard lockups due to screaming IRQs.

	Ingo
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