We changed the default to madvise, as using it as always results in performance regressions in our testing. See bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1703742.
Have you run any specific tests on Power Systems that would justify changing the setting for ppc64el only? Thanks. Cascardo. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1753708 Title: Ubuntu18.04:PowerPC - Set Transparent Huge Pages (THP) by default to "always" Status in The Ubuntu-power-systems project: Triaged Status in linux package in Ubuntu: Triaged Status in linux source package in Bionic: Triaged Bug description: == Comment: #0 - Praveen K. Pandey <praveen.pan...@in.ibm.com> - 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1753708/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
