[Bug 1897483] Re: With hardware offloading enabled, OVS logs are spammed with netdev_offload_tc ERR messages

[James Page]

Triaging as enough there to confirm this is a bug and Medium as there is
a workaround.

** Changed in: openvswitch (Ubuntu)
       Status: New => Triaged

** Changed in: openvswitch (Ubuntu)
   Importance: Undecided => Medium

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https://bugs.launchpad.net/bugs/1897483

Title:
  With hardware offloading enabled, OVS logs are spammed with
  netdev_offload_tc ERR messages

Status in OpenStack neutron-openvswitch charm:
  Invalid
Status in openvswitch package in Ubuntu:
  Triaged

Bug description:
  If neutron-openvswitch charm is deployed with enable-hardware-
  offload=true ovs-vswitchd.log are flooded with messages like those:

  2020-09-27T21:55:40.460Z|28192|netdev_offload_tc(revalidator625)|ERR|Dropped 11 log messages in last 1 seconds (most recently, 1 seconds ago) due to excessive rate
  2020-09-27T21:55:40.460Z|28193|netdev_offload_tc(revalidator625)|ERR|dump_create: failed to get ifindex for qr-66e28056-8f: Operation not supported
  2020-09-27T21:55:41.461Z|28194|netdev_offload_tc(revalidator625)|ERR|Dropped 11 log messages in last 1 seconds (most recently, 1 seconds ago) due to excessive rate
  2020-09-27T21:55:41.461Z|28195|netdev_offload_tc(revalidator625)|ERR|dump_create: failed to get ifindex for qr-66e28056-8f: Operation not supported
  2020-09-27T21:55:42.461Z|28196|netdev_offload_tc(revalidator625)|ERR|Dropped 11 log messages in last 1 seconds (most recently, 1 seconds ago) due to excessive rate
  2020-09-27T21:55:42.461Z|28197|netdev_offload_tc(revalidator625)|ERR|dump_create: failed to get ifindex for qr-66e28056-8f: Operation not supported
  2020-09-27T21:55:43.462Z|28198|netdev_offload_tc(revalidator625)|ERR|Dropped 11 log messages in last 1 seconds (most recently, 1 seconds ago) due to excessive rate
  2020-09-27T21:55:43.462Z|28199|netdev_offload_tc(revalidator625)|ERR|dump_create: failed to get ifindex for qr-66e28056-8f: Operation not supported
  2020-09-27T21:55:44.464Z|28200|netdev_offload_tc(revalidator625)|ERR|Dropped 11 log messages in last 1 seconds (most recently, 1 seconds ago) due to excessive rate
  2020-09-27T21:55:44.464Z|28201|netdev_offload_tc(revalidator625)|ERR|dump_create: failed to get ifindex for qr-66e28056-8f: Operation not supported

  The messages are possibly harmful, but there are thousands of them per
  hour. They can be disabled by executing:

  sudo ovs-appctl vlog/set netdev_offload_tc:OFF

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