Commit 2e123b44 authored Mar 08, 2017 by Michael S. Tsirkin

virtio_net: enable big packets for large MTU values



If one enables e.g. jumbo frames without mergeable
buffers, packets won't fit in 1500 byte buffers
we use. Switch to big packet mode instead.
TODO: make sizing more exact, possibly extend small
packet mode to use larger pages.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

parent a71c9a1c

drivers/net/virtio_net.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -2367,6 +2367,10 @@ static int virtnet_probe(struct virtio_device *vdev)
		dev->mtu = mtu;
		dev->max_mtu = mtu;
		}

		/* TODO: size buffers correctly in this case. */
		if (dev->mtu > ETH_DATA_LEN)
		vi->big_packets = true;
		}

		if (vi->any_header_sg)