Hi Ben,

Could you point us to the commit that fixed this issue?
We already tried patching with this commit which seemed relevant, but the issue 
still recreated - 
https://github.com/openvswitch/ovs/commit/f519a72d9a3708fbc5f796f176e7c8bd3dcfb738

We will retry with your suggestion of using the 2.5 branch code, but we might 
want to backport the specific fix unless there is a 2.5.1 release including it.
If the commit linked above is the one you were thinking of, please note a small 
difference - in the commit the rcu is blocked waiting for vhost_thread to 
quiesce, while in our case rcu is blocked waiting for pmd to quiesce.

Thanks,
--alon


-----Original Message-----
From: discuss [mailto:discuss-boun...@openvswitch.org] On Behalf Of Ben Pfaff
Sent: יום ה 21 אפריל 2016 19:54
To: Yi Ba <yby.develo...@yahoo.com>
Cc: b...@openvswitch.org
Subject: Re: [ovs-discuss] ovs get stuck when running traffic from VM to VM on 
same compute

On Thu, Apr 21, 2016 at 01:24:35PM +0000, Yi Ba wrote:
>      
>    - What you did that make the problem appear.   
> launching 2 VMs on the same host. The host has ovs-dpdk and the VM ports are 
> vhostuser. Generating bi-directional traffic (each VM sends to the other) 
> using dpdk from within the VMs.   
> 
>    - What you expected to happen.   
> Traffic will run with no issues   
> 
>    - What actually happened.   
> The OVS gets stuck. See attached the relevant of the ovs-vswitchd.log   
> 
>    
>    - The Open vSwitch version number (as output by ovs-vswitchd --version)   
> 2.5.0   

It's fixed on branch-2.5, please upgrade.
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