Routing traffic though a namespace

[NEVEU Stephane]

Hi all,

Sorry, I'm not sure to be in the right place to ask my question, if not do not hesitate to tell me where to do so.
Here is my problem, I'm using a vanilla kernel 3.14.34 (patched with PaX/Grsecurity) on a virtual machine (ubuntu 14.04) made to be an openstack tenant router (so using netns and ovs). I'm experiencing a really slow bandwidth while routing traffic through a namespace between 2 VM on 2 different vlan (tagged with ovs).
Here is a picture representing my issue :
http://postimg.org/image/dcs55r7nl/
Tests were done with iperf. As you can see I have only 80kb/s with the vanilla kernel (I have actually the same low bandwidth without patching with grsecurity so the problem cannot come from here) (red color) and about 4Gb/s with your kernel. I took the same .config as yours to compile it.
So my questions are : is there a patch applied to make it work ? Could you help me ?
I can provide you any information required.
Thank you.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20150305/ce2ab280/attachment.html>