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authorWillem de Bruijn <willemb@google.com>2019-01-18 04:08:53 +0300
committerDavid S. Miller <davem@davemloft.net>2019-01-19 21:05:30 +0300
commit133bbb18ab1a2f5549435c5a3126413344ddbcb8 (patch)
tree7744a3f5a38ce587b6f7bf4348e008b3187db865 /drivers/net/virtio_net.c
parent5f2939d933e9616b8b779fa46963689000f1a8f4 (diff)
downloadlinux-133bbb18ab1a2f5549435c5a3126413344ddbcb8.tar.xz
virtio-net: per-queue RPS config
On multiqueue network devices, RPS maps are configured independently for each receive queue through /sys/class/net/$DEV/queues/rx-*. On virtio-net currently all packets use the map from rx-0, because the real rx queue is not known at time of map lookup by get_rps_cpu. Call skb_record_rx_queue in the driver rx path to make lookup work. Recording the receive queue has ramifications beyond RPS, such as in sticky load balancing decisions for sockets (skb_tx_hash) and XPS. Reported-by: Mark Hlady <mhlady@google.com> Signed-off-by: Willem de Bruijn <willemb@google.com> Acked-by: Jason Wang <jasowang@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/virtio_net.c')
-rw-r--r--drivers/net/virtio_net.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 023725086046..236ba5d5fb4b 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1035,6 +1035,7 @@ static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
goto frame_err;
}
+ skb_record_rx_queue(skb, vq2rxq(rq->vq));
skb->protocol = eth_type_trans(skb, dev);
pr_debug("Receiving skb proto 0x%04x len %i type %i\n",
ntohs(skb->protocol), skb->len, skb->pkt_type);