Regarding bug 82471

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.

Thanks for your help,

Laurent

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

Hi Michal,

Just compiled 3.17-rc7 and it seems it is fixed. Will report later on on this, but since the issue appears very shortly after server startup, we should be all set.

Thanks

Laurent