This patch-set improves offloads transitions behavior.

Patch #1 avoids flushing PMD offloads unnecessarily.
Patch #2 fixes a race condition with flow modifications.
Patch #3 improves debuggability of flow modifications.

v2-v1: Rebase.

Travis:
v1: https://travis-ci.org/github/elibritstein/OVS/builds/767839987

GitHub Actions:
v1: https://github.com/elibritstein/OVS/actions/runs/769805954
    - This run has encountered some internal GitHub problems.
    - A previous good run, with the same code, only changed commit
      messages since:
    https://github.com/elibritstein/OVS/actions/runs/766660787
v2: https://github.com/elibritstein/OVS/actions/runs/1023045302

Eli Britstein (3):
  dpif-netdev: Do not flush PMD offloads on reload
  dpif-netdev: Fix offloads of modified flows
  dpif-netdev: Log flow modification in debug level

 lib/dpif-netdev.c | 130 ++++++++++++++++++++++------------------------
 1 file changed, 63 insertions(+), 67 deletions(-)

-- 
2.28.0.2311.g225365fb51

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