netdev - Re: [BUG] ipv6 and TSO on GRE is broken

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Message-ID: <CALnjE+pPmsJx6zqcA7PnR3GX3HUrrtCbZyqj7nyEDBCv9_Tntw@mail.gmail.com>
Date:	Thu, 2 May 2013 00:02:17 -0700
From:	Pravin Shelar <pshelar@...ira.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev <netdev@...r.kernel.org>,
	"Steinar H. Gunderson" <sesse@...gle.com>
Subject: Re: [BUG] ipv6 and TSO on GRE is broken

I forgot to add gre gso handler to inet6 offloads list.

I will send out patch soon.

Thanks,
Pravin.

On Wed, May 1, 2013 at 8:53 AM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> This was reported by Steinar.
>
> Sending this to netdev, as I wont have time to debug this in the near
> future. (~ 3 days)
>
> 3.9 and latest net-next are broken for IPv6 on top of GRE tunnel
>
> GSO seems OK, but TSO not :
>
> lpq83:~# ethtool -K gre1 tso off gso on
> lpq83:~# netperf -H 4444::555:0084
> MIGRATED TCP STREAM TEST from ::0 (::) port 0 AF_INET6 to 4444::555:0084
> () port 0 AF_INET6
> Recv   Send    Send
> Socket Socket  Message  Elapsed
> Size   Size    Size     Time     Throughput
> bytes  bytes   bytes    secs.    10^6bits/sec
>
>  87380  16384  16384    10.00    3789.10
> lpq83:~# ethtool -K gre1 tso on
> lpq83:~# netperf -H 4444::555:0084
> MIGRATED TCP STREAM TEST from ::0 (::) port 0 AF_INET6 to 4444::555:0084
> () port 0 AF_INET6
> Recv   Send    Send
> Socket Socket  Message  Elapsed
> Size   Size    Size     Time     Throughput
> bytes  bytes   bytes    secs.    10^6bits/sec
>
>  87380  16384  16384    10.00     321.27
>
>
> No problem for IPv4
>
> Thanks
>
>
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