[Xen-devel] Re: timer interrupts, virqs, irq balance questions

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 20 Sep 2005, at 16:06, Ryan Harper wrote:

> I've been looking into bug [1]#195 and I have a couple of questions on
> how timer interrupts and virqs are handled.  Is it possible for dom0
> linux to irq balance timer interrupts to different cpus?  That is, if
> xen sends a VIRQ_TIMER to vcpu0, backed by cpu0, is it possible for 
> that
> interrupt to be handled by vcpu1, backed by cpu1 ?
No, event channels bound to VIRQs cannot have their cpu affinity 
changed. So vcpu0 VIRQ_TIMER will always call back to vcpu0, and so on.
 -- Keir


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