Hello, Jan. As you know, with VT-d PI enabled, hardware can directly deliver external interrupts to guest without any VMM intervention. It will reduces overall interrupt latency to guest and reduces overheads otherwise incurred by the VMM for virtualizing interrupts. In my mind, it's an important feature to interrupt virtualization.
But VT-d PI feature is disabled by default on Xen for some corner cases and bugs. Based on Feng's work, we have fixed those corner cases related to VT-d PI. Do you think it is a time to enable VT-d PI by default. If no, could you list your concerns so that we can resolve them? Thanks Chao _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
