[ovs-discuss] Unable to set queue min-rate to zero

Ben Pfaff blp at nicira.com
Thu Mar 27 00:35:49 UTC 2014

On Wed, Mar 26, 2014 at 12:25:52PM +0100, Slavica Tomovic wrote:
> I want to create OF application that will dynamically create queues
> for QoS traffic flows. I want to reserve queue 0 on every port for
> best-effort traffic, and I don't want to guarantee bandwidth for it.
> It should always get part of bandwidth that QoS traffic doesn't use in
> that moment.
> So, I used this command to create q0:
> ovs-vsctl -- set Port eth1 qos=@newqos -- --id=@newqos create QoS
> type=linux-htb other-config:max-rate=10000000 queues=0=@q0 -- --id=@q0
> create Queue other-config:min-rate=0 other-config:max-rate=10000000
> As result I get uuids of created queues and Alarm Clock message.
> After that, when I use ovs-ofctl command I get message that connection
> is refused and have to run vswitchd again...

It seems likely that there's a bug causing OVS to crash when you set
that min-rate.  Can you get a backtrace?

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