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[liuxiuli <liu.lixiu@xxxxxxxxxx>]

Public bug reported:

version:master
problem:
NUMATopologyFilter fail when only one node has sibling while host has two node when cpu_thread_policy is require.

for example:
host has cpu info:
NUMA node0 CPU(s):     0-3,8-11
NUMA node1 CPU(s):     4-7,12-15

If vcpu_pin_set is 0-3,8-11, we can not boot instance with "hw:cpu_policy": "dedicated", "hw:cpu_thread_policy": "require" with NUMATopologyFilter in default_filters, and NUMATopologyFilter will fail for node 2 has no sibling.
The log info:
host fails CPU policy requirements. Host does not have hyperthreading or hyperthreading is disabled, but 'require' threads policy was requested.

** Affects: nova
     Importance: Undecided
     Assignee: liuxiuli (liu-lixiu)
         Status: New

** Changed in: nova
     Assignee: (unassigned) => liuxiuli (liu-lixiu)

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https://bugs.launchpad.net/bugs/1599411

Title:
  NUMATopologyFilter fail when only one node has sibling while host has
  two node when cpu_thread_policy is require.

Status in OpenStack Compute (nova):
  New

Bug description:
  version:master
  problem:
  NUMATopologyFilter fail when only one node has sibling while host has two node when cpu_thread_policy is require.

  for example:
  host has cpu info:
  NUMA node0 CPU(s):     0-3,8-11
  NUMA node1 CPU(s):     4-7,12-15

  If vcpu_pin_set is 0-3,8-11, we can not boot instance with "hw:cpu_policy": "dedicated", "hw:cpu_thread_policy": "require" with NUMATopologyFilter in default_filters, and NUMATopologyFilter will fail for node 2 has no sibling.
  The log info:
  host fails CPU policy requirements. Host does not have hyperthreading or hyperthreading is disabled, but 'require' threads policy was requested.

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