netdev - Re: [PATCH] - vxlan: gro not effective for intel 82599

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Message-ID: <CAJ3xEMj_3+p9CGH8bkF26E9X0KGQdTr14S-vACS7zKcPPO6pQA@mail.gmail.com>
Date:	Sun, 28 Jun 2015 23:19:22 +0300
From:	Or Gerlitz <gerlitz.or@...il.com>
To:	Tom Herbert <tom@...bertland.com>
Cc:	Ramu Ramamurthy <sramamur@...ux.vnet.ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jiri Benc <jbenc@...hat.com>, James Morris <jmorris@...ei.org>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	pradeeps@...ux.vnet.ibm.com, J Kidambi <jkidambi@...ibm.com>
Subject: Re: [PATCH] - vxlan: gro not effective for intel 82599

On Fri, Jun 26, 2015 at 10:59 PM, Tom Herbert <tom@...bertland.com> wrote:
[...]
> Looks like GRO was never implemented for vxlan tunnels. The driver is
> simply calling netif_rx instead of using the GRO cells infrastructure.
> geneve is doing the same thing. For other tunnels which are used in
> foo-over-udp (GRE, IPIP, SIT) ip_tunnel_rcv is called which in turn
> calls gro_cells_receive.

Tom,

Since v3.14, when a tunneled (say VXLAN/GRE) packets are received on
the physical interface, they go through GRO aggregation before being
delivered up to the tunnel "device" (e.g either vxlan/gre netdevice or
OVS vxlan/gre vport) -- so in that respect, can you elaborate a little
further why we want to GRO them again?

Or.
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