[ovs-discuss] Assertions/crashes in lib/cmap.* on conntrack branch

[Ben Pfaff]

On Wed, Jan 06, 2016 at 02:14:21PM -0800, Ben Warren wrote:
> Hi Ben,
> 
> > On Jan 5, 2016, at 4:25 PM, Ben Pfaff <blp at ovn.org> wrote:
> > 
> > On Wed, Dec 30, 2015 at 02:13:27PM -0800, Keith Holleman wrote:
> >> To follow up on this issue, we wanted to recreate this on a simpler host
> >> and setup and are able to reproduce this very easily also there.  The
> >> information and steps are below:
> >> 
> >> Host - 16 cVPU 8GB host 14.04 Ubuntu LTS running on Xen, single ethernet
> >> device
> >> OVS - From top of tree https://github/openvswitch/ovs as of this morning
> >> (bdc30bfb5c02e1cc6142102423d14184e503487b)
> >> Steps to reproduce:  Same as before, have traffic coming in and using CT
> >> rules, create a bond, add it to bridge, sleep, del-bond, del, bridge, and
> >> repeat.
> > 
> > I see a bug in the code that could trigger this, but I can't reproduce
> > the problem myself.  Can you please test the proposed fix for me?  The
> > patch is posted at:
> >        http://openvswitch.org/pipermail/dev/2016-January/064068.html
> 
> Keith and I have tested this and after several thousand iterations, we
> haven’t seen the cmap_replace() crash.

Thanks for testing!  I separately got a code review for this patch, so
I'll apply it with Joe's feedback to the appropriate branches in a
minute or two.