Cause: Tuned scheduler plugin did not recognize container processes as exceptions being managed by OCP's cpu manager. Consequence: Tuned modified the pinning of containers on restart and placed them all on the house keeping (reserved) cpus. This broke pinning guarantees and overloaded the reserved cpus. Fix: A new tuned feature #1980715 allows defining exceptions using cgroup name and PAO configures tuned to ignore container pinning. Result: Container pinning is now managed by OCP's cpu manager only.