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    SubjectRe: 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


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