Messages in this thread | | | Date | Mon, 12 Jan 2009 12:37:20 +0100 | From | Ingo Molnar <> | Subject | Re: PCI, ACPI, IRQ, IOAPIC: reroute PCI interrupt to legacy boot interrupt equivalent |
| |
* Stefan Assmann <sassmann@suse.de> 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
| |