Re: [PATCH] 2.5.68 Fix IO_APIC IRQ assignment bug

From: Zwane Mwaikambo (zwane@linuxpower.ca)
Date: Mon Apr 21 2003 - 12:22:42 EST


On Mon, 21 Apr 2003, Mika Penttilä wrote:

> Why can't we use the same vector for multiple ioapic entrys? After all,
> we are already sharing irqs, and an irq is just a cookie for a vector.
> What do you mean with "lost irq routing" ?

Each ioredtbl can take a vector, if you assign another ioredtbl with the
same vector and different IRQ then you collide with the previous entry and
wipe it from the IDT. Also irq != vector

        Zwane

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