From: Brice Goglin

Date: Thu, 28 Aug 2008 22:21:53 +0200
> With more and more drivers using multiqueues, I think we need a nice way

quoted text
> to bind MSI-X from within the drivers. I am not sure what's best, the

> attached (untested) patch would just export the existing

> irq_set_affinity() and add irq_get_affinity(). Comments?

I think we should rather have some kind of generic thing in the

IRQ layer that allows specifying the usage model of the device's

interrupts, so that the IRQ layer can choose a default affinities.
I never notice any of this complete insanity on sparc64 because

we flat spread out all of the interrupts across the machine.
What we don't want it drivers choosing IRQ affinity settings,

they have no idea about NUMA topology, what NUMA node the

PCI controller sits behind, what cpus are there, etc.  and

without that kind of knowledge you cannot possible make

affinity decisions properly.

--

unsubscribe notice
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in

the body of a message to majordomo@vger.kernel.org

More majordomo info at  http://vger.kernel.org/majordomo-info.html

Please read the FAQ at  http://www.tux.org/lkml/