ovn: ovs-system: deferred action limit reached, drop recirc action

[Michal Nasiadka]

OpenStack release - Wallaby
OVN version 21.06
OVS version 2.16
CentOS Stream 8, various kernel versions

Seeing a lot of ovs-system: deferred action limit reached, drop recirc action on the active gateway chassis.
Also the dropped packets counter for breth2-ovs (which is the external bridge) is increasing over time.

[ 3435.828519] openvswitch: ovs-system: deferred action limit reached, drop recirc action
[ 3436.820595] openvswitch: ovs-system: deferred action limit reached, drop recirc action
[ 3436.964035] openvswitch: ovs-system: deferred action limit reached, drop recirc action
[ 3437.620312] openvswitch: ovs-system: deferred action limit reached, drop recirc action
[ 3437.706389] openvswitch: ovs-system: deferred action limit reached, drop recirc action
[ 3438.153331] openvswitch: ovs-system: deferred action limit reached, drop recirc action
[ 3438.346396] openvswitch: ovs-system: deferred action limit reached, drop recirc action
[ 3440.328273] net_ratelimit: 2 callbacks suppressed
[ 3440.333636] openvswitch: ovs-system: deferred action limit reached, drop recirc action
[ 3462.687204] openvswitch: ovs-system: deferred action limit reached, drop recirc action

Found https://<email address hidden>/msg53195.html and https://mail.openvswitch.org/pipermail/ovs-discuss/2021-August/051340.html which might be related.
I'm not sure if that's Neutron bug or OVN bug.

It's not a blocker, or a huge problem - everything works properly.

[Miguel Lavalle (minsel)]

I tried to find the issue in two different OpenStack deployments. Didn't find it. For now, it doesn't seem to be a Neutron issue. I'm marking it as incomplete. Please feel free to provide more info that might help us to link it to Neutron

[Launchpad Janitor (janitor)]

[Expired for neutron because there has been no activity for 60 days.]