The "vm.lower_zone_protection" tunable is not available in Red Hat Enterprise Linux 5 or 6

Solution Unverified - Updated -

Issue

  • Why "vm.lower_zone_protection" tunable parameter is not available in Red Hat Enterprise Linux 5 or 6 ?

    # echo 100 > /proc/sys/vm/lower_zone_protection
-bash: /proc/sys/vm/lower_zone_protection: No such file or directory

Environment

  • Red Hat Enterprise Linux 5 all versions
  • Red Hat Enterprise Linux 6 all versions
  • x86_64(64bit architecture)
  • x86(32bit architecture)

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