Although I have added processor.max_cstate=0 to the cmdline, /proc/cmdline still shows processor.max_cstate=1

Solution Verified - Updated -

Issue

  • Although I have added processor.max_cstate=0 to the cmdline, /proc/cmdline still shows processor.max_cstate=1
  • Any suggestions on why this discrepancy?
  • The following 3 parameters are in the cmdline:
    • processor.max_cstate=0
    • idle=poll
    • intel_idle.max_cstate=0

Environment

  • Red Hat Enterprise Linux 8
  • intel_idle driver
  • acpi_idle driver

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