Duplicate kernel arguments "intel_iommu=on iommu=pt" on RHCOS nodes

Solution Verified - Updated -

Issue

  • Applying tuned performance profile causes duplicate intel_iommu=on iommu=pt kernel arguments.
# rpm-ostree kargs | grep -i iommu
intel_iommu=on iommu=pt intel_iommu=on iommu=pt isolcpus=managed_irq,2-31,66-95,34-63,98-127 nohz_full=2-31,66-95,34-63,98-127 tsc=reliable nosoftlockup nmi_watchdog=0 mce=off skew_tick=1 rcutree.kthread_prio=11 default_hugepagesz=2M

Environment

  • Red Hat OpenShift Container Platform (RHOCP) 4
  • Red Hat CoreOS (RHCOS)
  • openshift-sriov-network-operator
  • node-tuning

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