netdev - Re: A performance regression of gretap

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Message-ID: <1373508910.12250.4.camel@cr0>
Date:	Thu, 11 Jul 2013 10:15:10 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Pravin B Shelar <pshelar@...ira.com>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: A performance regression of gretap

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.

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