Re: IRQ affinities

[Max Krasnyanskiy]

Arjan van de Ven wrote:
> On Tue, 20 May 2008 18:14:58 -0700
> Max Krasnyanskiy <maxk@xxxxxxxxxxx
>
> > For the IRQs specifically all I need is to be able to tell the kernel
> > to not route IRQs to certain CPUs. That's mostly works already via 
> > /proc/irq/N/smp_affinity, the problem is dynamically allocated irqs
> > because /proc/irq/N directory does not exist until those IRQs are
> > allocated/enabled.
> \\
>
> why don't you tell irqbalance instead? it'll make sure the irq stays
> out of the wind...

That will be too late. By the time irqbalance sees that IRQ it may have 
already fired (possibly several times) on the "wrong" processor.

Max

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/