netdev - Re: Regarding bug 82471

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Message-ID: <20140929055156.GA13693@unicorn.suse.cz>
Date:	Mon, 29 Sep 2014 07:51:56 +0200
From:	Michal Kubecek <mkubecek@...e.cz>
To:	netdev@...r.kernel.org
Cc:	Laurent CARON <lcaron@...sa.com>
Subject: Re: Regarding bug 82471

On Fri, Sep 26, 2014 at 06:35:34PM +0200, Laurent CARON wrote:
> Hi,
> 
> I've been biten by :
> https://bugzilla.kernel.org/show_bug.cgi?id=82471 today.
> 
> I tried various kernels from 3.2.0 to 3.16.3
> 
> The last unaffected kernel according to my tests is 3.14 (didn't yet
> try 3.15).
> 
> Please see logs when (on 3.16.2)
> 1/ using iptables
> 2/ having some traffic (even light) going through
> 
> http://pastebin.com/JWkFu2w2
> 
> My network config is the following:
> 
> a bond interface consisting of 2 10Gb ports (intel ixgbe / X520-SR2)
> on top of which I use 2 vlans.

I don't see why it would affect ixgbe adapters which support Tx VLAN
offloading (and with which the original patch was tested) but the
symptoms look very much like those fixed by commit db115037bb57 ("net:
fix checksum features handling in netif_skb_features()"). Could you
please test with 3.17-rc5 or later?

                                                      Michal Kubeček

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