From 58ce31cca1ffe057f4744c3f671e3e84606d3d4a Mon Sep 17 00:00:00 2001 From: Tom Herbert Date: Wed, 19 Aug 2015 17:07:33 -0700 Subject: [PATCH] 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: Tom Herbert Signed-off-by: David S. Miller --- drivers/net/vxlan.c | 9 +++++++-- include/net/vxlan.h | 1 + 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index 64fcd2402562..61b457b9ec00 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -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); } @@ -3093,8 +3096,10 @@ 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); diff --git a/include/net/vxlan.h b/include/net/vxlan.h index 43677e6b9c43..6b3234599a2c 100644 --- a/include/net/vxlan.h +++ b/include/net/vxlan.h @@ -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; -- 2.30.2