netdev - Re: A performance regression of gretap

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Message-ID: <CALnjE+oNMcXORdMgzHtomdf+EDknZaCsiB-+aevMbg-rsxbpww@mail.gmail.com>
Date:	Wed, 10 Jul 2013 19:28:06 -0700
From:	Pravin Shelar <pshelar@...ira.com>
To:	Cong Wang <amwang@...hat.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: A performance regression of gretap

On Wed, Jul 10, 2013 at 7:15 PM, Cong Wang <amwang@...hat.com> wrote:
> On Wed, 2013-07-10 at 06:01 -0400, Cong Wang wrote:
>>
>> Could you please take a look? And, gre tunnel is fine, this
>> problem only exists for gretap. I reviewed the gretap code,
>> but can't find any bug.
>
> After digging it a little bit, I found some of the packets on RX side
> have incorrect TCP checksum after going through gretap, while the
> packets captured on eth0 are all correct.
>
> Thanks.
>
I do not see it on my end.
Can you tell me NIC type and features set for eth device?
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