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Commit 58ce31cc authored by Tom Herbert's avatar Tom Herbert Committed by David S. Miller
Browse files

vxlan: GRO support at tunnel layer 



Add calls to gro_cells infrastructure to do GRO when receiving on a tunnel.

Testing:

Ran 200 netperf TCP_STREAM instance

  - With fix (GRO enabled on VXLAN interface)

    Verify GRO is happening.

    9084 MBps tput
    3.44% CPU utilization

  - Without fix (GRO disabled on VXLAN interface)

    Verified no GRO is happening.

    9084 MBps tput
    5.54% CPU utilization

Signed-off-by: default avatarTom Herbert <tom@herbertland.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b7fe10e5

drivers/net/vxlan.c

+7 −2
Original line number Diff line number Diff line
@@ -1208,7 +1208,7 @@ static void vxlan_rcv(struct vxlan_sock *vs, struct sk_buff *skb, 
	stats->rx_bytes += skb->len;

	u64_stats_update_end(&stats->syncp);



	netif_rx(skb);

	gro_cells_receive(&vxlan->gro_cells, skb);



	return;

drop:
@@ -2446,6 +2446,8 @@ static void vxlan_setup(struct net_device *dev) 


	vxlan->dev = dev;



	gro_cells_init(&vxlan->gro_cells, dev);



	for (h = 0; h < FDB_HASH_SIZE; ++h)

		INIT_HLIST_HEAD(&vxlan->fdb_head[h]);

}
@@ -2885,6 +2887,7 @@ static void vxlan_dellink(struct net_device *dev, struct list_head *head) 
		hlist_del_rcu(&vxlan->hlist);

	spin_unlock(&vn->sock_lock);



	gro_cells_destroy(&vxlan->gro_cells);

	list_del(&vxlan->next);

	unregister_netdevice_queue(dev, head);

}
@@ -3093,9 +3096,11 @@ static void __net_exit vxlan_exit_net(struct net *net) 
		/* If vxlan->dev is in the same netns, it has already been added

		 * to the list by the previous loop.

		 */

		if (!net_eq(dev_net(vxlan->dev), net))

		if (!net_eq(dev_net(vxlan->dev), net)) {

			gro_cells_destroy(&vxlan->gro_cells);

			unregister_netdevice_queue(vxlan->dev, &list);

		}

	}



	unregister_netdevice_many(&list);

	rtnl_unlock();

include/net/vxlan.h

+1 −0
Original line number Diff line number Diff line
@@ -161,6 +161,7 @@ struct vxlan_dev { 
	struct timer_list age_timer;

	spinlock_t	  hash_lock;

	unsigned int	  addrcnt;

	struct gro_cells  gro_cells;



	struct vxlan_config	cfg;