group.of.nepali.translators team mailing list archive

[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

I built X, Z and A test kernels with commit
4ae279c2c96ab38a78b954d218790a8f6db714e5.  The test kernels can be
downloaded from:

http://kernel.ubuntu.com/~jsalisbury/lp1706247/

Can you test these kernels and see if they resolve this bug?

** Changed in: linux (Ubuntu)
       Status: Triaged => In Progress

** Changed in: linux (Ubuntu)
     Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) => Joseph Salisbury (jsalisbury)

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Artful)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Zesty)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: linux (Ubuntu Zesty)
       Status: New => In Progress

** Changed in: linux (Ubuntu Artful)
       Status: New => In Progress

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Zesty)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Artful)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Zesty)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

** Changed in: linux (Ubuntu Artful)
     Assignee: (unassigned) => Joseph Salisbury (jsalisbury)

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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1706247

Title:
  It should not be possible to turn on 16g huge pages on Ubuntu 16.04.2
  PowerNV

Status in The Ubuntu-power-systems project:
  Triaged
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Zesty:
  In Progress
Status in linux source package in Artful:
  In Progress

Bug description:
  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 (mchollin@xxxxxxxxxx) 
   
  ---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 (mchollin@xxxxxxxxxx): 
  -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.

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