netdev - Re: GREv4 ipv6 is broken for UDP stream on 3.9

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Message-ID: <CAM8tLiMQtSBjZv5Ojt1OVSrffT88Gn5KrEcKtROXjyLXnbQPtg@mail.gmail.com>
Date:	Thu, 30 May 2013 20:36:04 +0300
From:	Dmitry Kravkov <dkravkov@...il.com>
To:	Pravin Shelar <pshelar@...ira.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: GREv4 ipv6 is broken for UDP stream on 3.9

On Thu, May 30, 2013 at 7:46 PM, Pravin Shelar <pshelar@...ira.com> wrote:
> I sent out fix "udp6: Fix udp fragmentation for tunnel traffic."
> Can you give it a try ?

Sure! Stay tuned...

>
> Thanks.
>
> On Wed, May 29, 2013 at 1:16 AM, Dmitry Kravkov <dkravkov@...il.com> wrote:
>> Hi,
>>
>> since 3.9-rc1 i see that rx side drops all data packets for:
>>
>> netperf -6 -t UDP_STREAM -H fe80::5efe:c0a8:630c%gre_7 -l 1
>>
>> when gre_7 is:
>>
>> 13: gre_7: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1476 qdisc noqueue state UNKNOWN
>>     link/gre 192.168.99.29 peer 192.168.99.12
>>
>> The packets just gets corrupted.
>>
>> This bisected to:
>> commit 68c331631143f5f039baac99a650e0b9e1ea02b6
>> Author: Pravin B Shelar <pshelar@...ira.com>
>> Date:   Thu Feb 14 14:02:41 2013 +0000
>>
>>     v4 GRE: Add TCP segmentation offload for GRE
>>
>> Looks like gre_gso_segment build wrong segments for GSO flow.



--
Best regards,
Dmitry
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