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According to the virtio spec the guest should always be interrupted when "used" descriptors are returned from the device to the driver. However this was not the case for the TX queue in either the virtio-net implementation or the vhost-user-net implementation. This would have meant that the guest could end up with a reduced TX throughput as it would not know that the packets had been dispatched via the VMM. Signed-off-by: Rob Bradford <robert.bradford@intel.com> |
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