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xen-devel
[Xen-devel] Re: event delay issue on SMP machine when xen0 is SMP enable
On 9 Dec 2005, at 07:03, Li, Xin B wrote:
We do need fix this issue because this is also a common issue in
complex
environment. Actually that will also be a performance issue, even when
event channel port is <64 since it depends on other events to get
notified.
Thanks for working out what's going on. A patch should be quite easy.
BTW, why vcpu other than vcpu0 won't handle event by default?
We could allow any vcpu to process any pending notifications. It would
mean vcpus outside an irq's affinity set could end up processing an
interrupt and I'm not sure if that's a good thing. It would actually
slightly simplify evtchn.c though (no need to apply a per-cpu mask to
the event-channel port array).
-- Keir
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