Re: [Xen-devel] IRQ balancing within the hypervisor

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 31/05/2010 10:46, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

> While pirq_guest_bind() makes a (lame) attempt at setting a new IRQ's
> affinity reasonably, subsequent adjustments to the (supposedly)
> handling vCPU's processor assignment as well as any domain specified
> vCPU affinity changes don't have any effect on the IRQ's affinity, not
> the least because there's neither a hypercall interface to allow the
> handling domain to inform Xen of its (virtual) affinity, nor a scheduler
> interface to adjust the affinity when the vCPU placement changes.
> 
> On large and/or heavily NUMA systems it may be quite desirable to
> get this changed - are there any plans, or was this considered/
> discussed in the past and rejected for some reason?

Noone's got round to it. It would be good to have.

 -- Keir

> Thanks, Jan
> 
> 
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