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Re: [Xen-devel] problem in setting cpumask for physical interrupt
| To: | "Agarwal, Lomesh" <lomesh.agarwal@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] problem in setting cpumask for physical interrupt |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Fri, 26 Oct 2007 07:42:03 +0100 |
| Delivery-date: | Thu, 25 Oct 2007 23:37:29 -0700 |
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| Thread-index: | AcgXaDI5jZ0n5YLuSS2nMjrC8ba3VwAMx79e |
| Thread-topic: | [Xen-devel] problem in setting cpumask for physical interrupt |
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An event channel can only be bound to one VCPU at a time. The IRQ should be bound to the CPU that that VCPU runs on. -- Keir On 26/10/07 01:36, "Agarwal, Lomesh" <lomesh.agarwal@xxxxxxxxx> wrote: Why does function pirq_guest_bind (in arch/x86/irq.c) calls set_affinity with cpumask of current processor? If I understand correctly pirq_guest_bind is called in response to guest calling request_irq. So, if by chance all guests call request_irq on the same physical processor then Xen may end up setting interrupt affinity to one physical processor only. _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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