Why does RHEL7.3 kernel accept `kernel.hung_task_warnings=-1`?

Solution Verified - Updated -

Issue

  • Why does RHEL7.3 kernel accept kernel.hung_task_warnings=-1? We tried to set kernel.hung_task_warnings=-1 but it doesn't work.

Environment

  • Red Hat Enterprise Linux 7
  • Earlier version than kernel-3.10.0-693.el7

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