[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Is there data copy between dom0 and domU
2014-04-23 12:22 GMT-04:00 Roger Pau Monnà <roger.pau@xxxxxxxxxx>:
What's the vif irq for? The following is my understanding, I am sure it is correct or not. When a packet arrives at physical machine, dom0 picks it up from NIC and puts it to ring buffer, then notify the destination domU. (Are all of them done by vif kernel thread?) So the vif irq is issued when dom0 notifies the destination domU, because vif is the virtual device of domU. If it is correct, the vif irq (xen-dyn-event) is an event (softirq?) on the event channel between dom0 and domU. While, if the vif irq processing does not happens on the same core where destination domU is running, one IPI is issued to finish the notification. Regards, Cong _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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