Disabling transparent hugepages (THP) on Red Hat Enterprise Linux 6 is not taking effect.

Solution Verified - Updated -

Issue

  • Unable to disable transparent hugepages (THP) even after appending "transparent_hugepage=never" to kernel command line in /boot/grub/grub.conf file.
    Eg:
# grep -i never /boot/grub/grub.conf 
    kernel /boot/vmlinuz-2.6.32-358.el6.x86_64 ro root=UUID=a216d1e5-884f-4e5c-859a-6e2e2530d486 rhgb quiet transparent_hugepage=never

# cat /sys/kernel/mm/redhat_transparent_hugepage/enabled
[always] never

# grep -i AnonHugePages /proc/meminfo 
AnonHugePages:    206848 kB

Environment

  • Red Hat Enterprise Linux (RHEL) 6
  • transparent hugepages (THP)
  • tuned
  • ktune

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