Re: [Xen-devel] Question Also regarding interrupt balancing

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 13 Jun 2006, at 00:42, harish wrote:

> echo 2 > /proc/irq/20/smp_affinity [...works..]
> echo 4 > /proc/irq/20/smp_affinity [...works..]
> echo 8 > /proc/irq/20/smp_affinity [...works..]
>
> But, a cumulative does not work...meaning...
> echo 3>
> echo 5>
> echo f>  etc.... do not work.
>
> Is that a bug or is it by design?
You should find it locks onto the first CPU in the mask that you 
specify. As I said, the kernel does not load-balance IRQs so it 
currently does not make sense to specify multi-cpu cpumasks. So this is 
by design, for now.
 -- Keir


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