netdev - Re: "TCP: eth0: Driver has suspect GRO implementation, TCP performance may be compromised." message with "ethtool -K eth0 gro off"

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Date:   Thu, 2 Feb 2017 13:34:27 +0100
From:   Markus Trippelsdorf <markus@...ppelsdorf.de>
To:     Eric Dumazet <eric.dumazet@...il.com>
Cc:     netdev@...r.kernel.org,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
Subject: Re: "TCP: eth0: Driver has suspect GRO implementation, TCP
 performance may be compromised." message with "ethtool -K eth0 gro off"

On 2017.02.02 at 04:32 -0800, Eric Dumazet wrote:
> 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

driver: ATL1E
version: 1.0.0.7-NAPI
firmware-version: L1e
expansion-rom-version:
bus-info: 0000:02:00.0
supports-statistics: no
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no

-- 
Markus