[dpdk-dev] Crashing OVS+DPDK at the host, from inside of a KVM Guest

[Christian Ehrhardt]

Hi,
ping ...

Later on I want to look at it again once we upgraded to more recent
releases of the software components involved, but those have to be made
ready to use first :-/

But the description is good and I wonder if anybody else could reproduce
this and/or would have a hint on where this might come from or already
existing related fixes.

I mean in general nothing should be able to crash the host right?


P.S. yeah two list cross posting, but it is yet unclear which it belongs to
so I'll keep it

Christian Ehrhardt
Software Engineer, Ubuntu Server
Canonical Ltd

On Sun, May 15, 2016 at 7:08 AM, Martinx - ジェームズ <thiagocmartinsc at gmail.com>
wrote:

> Guys,
>
>  If using OVS 2.5 with DPDK 2.2, on Ubuntu Xenial, it is possible to crash
> the OVS running at the host, from inside of a KVM Guest.
>
>  Basically, what I'm trying to do, is to run OVS+DPDK at the host, and
> also, inside of a KVM Guest, with multi-queue, but it doesn't work and
> crashes.
>
>  Soon as you enable multi-queue at the guest, it crashes the OVS of the
> host!
>
> OVS+DPDK segfault at the host, after running "ovs-vsctl set Open_vSwitch .
> other_config:n-dpdk-rxqs=4" within a KVM Guest:
>
> https://bugs.launchpad.net/ubuntu/+source/openvswitch/+bug/1577088
>
> Thanks!
> Thiago
>