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Luka Blaskovic authored
This patch adds support for multiqueue virtio-net[1] which sets a number of queues (file descriptors) from virtio_net_queues parameter for tap device to parallelize packets sending or receiving. Tap devices will be created with MULTI_QUEUE (IFF_MULTI_QUEUE) support. KVM paravirtual nics (virtio-net) are only one which supports this feature. Number of queues are limited by kernel tap implementation (currently to 8). Instances must manually set number of queues, on Linux using: ethtool -L ethX combined $queues Network device options logic is moved to separate method _GetNetworkDeviceFeatures which is now properly reused in hotplugging part. This also fixes unreported bug when vhost_net parameter is set to true, hotplugged network device will be created without "vhost=on" parameter. [1] http://www.linux-kvm.org/page/Multiqueue Signed-off-by: Luka Blaskovic <lblasc@znode.net> Reviewed-by: Jose A. Lopes <jabolopes@google.com>
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