** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: New => Triaged
** Tags added: kernel-da-key
** Also affects: linux (Ubuntu Bionic)
Importance: Medium
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage)
Status: Triaged
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https://bugs.launchpad.net/bugs/1753708
Title:
Ubuntu18.04:PowerPC - Set Transparent Huge Pages (THP) by default to
"always"
Status in linux package in Ubuntu:
Triaged
Status in linux source package in Bionic:
Triaged
Bug description:
== Comment: #0 - Praveen K. Pandey <[email protected]> - 2018-03-06
02:06:31 ==
Problem Description :
PowerPC systems running Ubuntu18.04 have Transparent Huge Pages (THP)
always set to "madvise". It should be by default set to "always".
Reproducible Step:
1- Install Ubuntu 18.04 on PowerPC box
2- cat /sys/kernel/mm/transparent_hugepage/enabled
3- grep "TRANSPARENT" /boot/config-$(uname -r)
it is set to madvise
LOG:
root@system:~# grep "TRANSPARENT" /boot/config-$(uname -r)
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
CONFIG_TRANSPARENT_HUGEPAGE=y
# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set
CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
CONFIG_TRANSPARENT_HUGE_PAGECACHE=y
root@system:~# cat /sys/kernel/mm/transparent_hugepage/enabled
always [madvise] never
root@system:~#
Regards
Praveen
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