From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: "TCP: eth0: Driver has suspect GRO implementation, TCP
 performance may be compromised." message with "ethtool -K eth0 gro off"
Date: Thu, 02 Feb 2017 04:32:13 -0800
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References: <20170202115240.GH17590@x4>
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Cc: netdev@vger.kernel.org,
        Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
To: Markus Trippelsdorf <markus@trippelsdorf.de>
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On Thu, 2017-02-02 at 12:52 +0100, Markus Trippelsdorf wrote:
> Hi,
> 
> from time to time I see the following warning in my kernel log:
> 
>  TCP: eth0: Driver has suspect GRO implementation, TCP performance may be compromised.
> 
> This happens although I run "/usr/sbin/ethtool -K eth0 gro off" in my
> local boot script. 
> What is the warning trying to tell me?
> 

Please report

ethtool -i eth0