Tuna options --isolate and --include change affinities of IRQs

Solution In Progress - Updated -

Issue

When tuna used with parameters like --isolate and --include and supplied a list of CPUs, then something changes affinities of IRQs through /proc/irq/XZY/{smp_affinity_list,smp_affinity} interface.

Environment

  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8

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