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Date:	Sun, 23 Nov 2014 14:18:27 -0500 (EST)
From:	David Miller <>
Subject: Re: [net PATCH] ipv6: Do not treat a GSO_TCPV4 request from UDP
 tunnel over IPv6 as invalid

From: Alexander Duyck <>
Date: Fri, 21 Nov 2014 19:37:09 -0800

> This patch adds SKB_GSO_TCPV4 to the list of supported GSO types handled by
> the IPv6 GSO offloads.  Without this change VXLAN tunnels running over IPv6
> do not currently handle IPv4 TCP TSO requests correctly and end up handing
> the non-segmented frame off to the device.
> Below is the before and after for a simple netperf TCP_STREAM test between
> two endpoints tunneling IPv4 over a VXLAN tunnel running on IPv6 on top of
> a 1Gb/s network adapter.
> Recv   Send    Send
> Socket Socket  Message  Elapsed
> Size   Size    Size     Time     Throughput
> bytes  bytes   bytes    secs.    10^6bits/sec
>  87380  16384  16384    10.29       0.88      Before
>  87380  16384  16384    10.03     895.69      After
> Signed-off-by: Alexander Duyck <>

Applied, thank you.
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