Public bug reported: 16G Huge Pages are not supported on PowerNV (bare metal) installations. Ubuntu 16.04.2 still allows 16G huge pages to be turned on. Contact Information = Mike Hollinger ([email protected]) ---uname output--- Linux aprilmin4 4.4.0-83-generic #106-Ubuntu SMP Mon Jun 26 17:53:54 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux Machine Type = 8335-GTB ---Debugger--- A debugger is not configured ---Steps to Reproduce--- 1. Add the following to the kernel boot args (either via editing the petitboot boot option manually, or updating /boot/grub/grub.cfg:
default_hugepagesz=16G hugepagesz=16G hugepages=4 2. Boot Linux 3. Observe that the kernel believes 16G huge pages are available: ubuntu@aprilmin7:~$ cat /proc/meminfo | grep -i huge AnonHugePages: 475136 kB HugePages_Total: 0 HugePages_Free: 0 HugePages_Rsvd: 0 HugePages_Surp: 0 Hugepagesize: 16777216 kB ubuntu@aprilmin7:~$ ls /sys/devices/system/node/node0/hugepages hugepages-1024kB hugepages-16384kB hugepages-16777216kB Stack trace output: no Oops output: no System Dump Info: The system is not configured to capture a system dump. *Additional Instructions for Mike Hollinger ([email protected]): -Post a private note with access information to the machine that the bug is occuring on. -Attach sysctl -a output output to the bug. This may be recreated on any bare metal POWER8 server with Ubuntu 16.04.2; I haven't checked other versions of Ubuntu. ** Affects: kernel-package (Ubuntu) Importance: Undecided Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) Status: New ** Tags: architecture-ppc64le bugnameltc-156931 severity-medium targetmilestone-inin--- ** Tags added: architecture-ppc64le bugnameltc-156931 severity-medium targetmilestone-inin--- ** Changed in: ubuntu Assignee: (unassigned) => Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) ** Package changed: ubuntu => kernel-package (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1706247 Title: Possible to turn on 16g huge pages on Ubuntu 16.04.2 PowerNV To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kernel-package/+bug/1706247/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
