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[Rafael Folco <rfolco@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Description
===========

Nova generating wrong cellid for numa memnode.

Some systems number nodeset for the NUMA topology in non-sequential way,
as follows:

node   0   1  16  17


Steps to reproduce
==================
Create a flavor w/ hw:numa_nodes=4 (hw:cpu_policy unset)

Spawn an instance across multiple nodes

Check nodeset in the instance XML


Expected result
===============

Correct cellid:

    <memnode cellid='0' mode='strict' nodeset='0'/>

    <memnode cellid='1' mode='strict' nodeset='1'/>

    <memnode cellid='2' mode='strict' nodeset='16'/>

    <memnode cellid='3' mode='strict' nodeset='17'/>


Actual result
=============


Wrong cellid:

    <memnode cellid='0' mode='strict' nodeset='0'/>

    <memnode cellid='1' mode='strict' nodeset='1'/>

    <memnode cellid='16' mode='strict' nodeset='16'/>

    <memnode cellid='17' mode='strict' nodeset='17'/>


Environment
===========

Ubuntu Xenial 16.10, OpenStack Mitaka release, Libvirt 1.3.1

Note: This issue has been found / tested on Ubuntu KVM on Power (ppc64le
arch), however, it *may* affect other architectures.

** Affects: nova
     Importance: Undecided
     Assignee: Rafael Folco (rafaelfolco)
         Status: In Progress

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https://bugs.launchpad.net/bugs/1602023

Title:
  Incorrect cellid in NUMA memnode

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  Description
  ===========

  Nova generating wrong cellid for numa memnode.

  Some systems number nodeset for the NUMA topology in non-sequential
  way, as follows:

  node   0   1  16  17



  Steps to reproduce
  ==================
  Create a flavor w/ hw:numa_nodes=4 (hw:cpu_policy unset)

  Spawn an instance across multiple nodes

  Check nodeset in the instance XML


  Expected result
  ===============

  Correct cellid:

      <memnode cellid='0' mode='strict' nodeset='0'/>

      <memnode cellid='1' mode='strict' nodeset='1'/>

      <memnode cellid='2' mode='strict' nodeset='16'/>

      <memnode cellid='3' mode='strict' nodeset='17'/>


  
  Actual result
  =============

  
  Wrong cellid:

      <memnode cellid='0' mode='strict' nodeset='0'/>

      <memnode cellid='1' mode='strict' nodeset='1'/>

      <memnode cellid='16' mode='strict' nodeset='16'/>

      <memnode cellid='17' mode='strict' nodeset='17'/>


  Environment
  ===========

  Ubuntu Xenial 16.10, OpenStack Mitaka release, Libvirt 1.3.1

  Note: This issue has been found / tested on Ubuntu KVM on Power
  (ppc64le arch), however, it *may* affect other architectures.

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