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[Matt Riedemann <mriedem.os@xxxxxxxxx>]

** Also affects: nova/pike
   Importance: Undecided
       Status: New

** Changed in: nova/pike
       Status: New => Confirmed

** Changed in: nova/pike
   Importance: Undecided => Low

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https://bugs.launchpad.net/bugs/1729784

Title:
  nova-compute.log display incorrect information for CPUPinningUnknown.

Status in OpenStack Compute (nova):
  In Progress
Status in OpenStack Compute (nova) pike series:
  Confirmed

Bug description:
  Description
  ===========
  When nova-compute occured CPUPinningUnknown exception, the information of nova-compute.log is wrong.

  Steps to reproduce
  ==================
  * I did create 6 instances with numa topology.
    [root@ctrl3 ~]# virsh list
   Id    Name                           State
  ----------------------------------------------------
   1     instance-00000002              running
   2     instance-00000006              running
   3     instance-0000000a              running
   4     instance-00000008              running
   5     instance-0000000c              running
   6     instance-00000004              running

  [root@ctrl3 ~]# virsh vcpupin 1
  VCPU: CPU Affinity
  ----------------------------------
     0: 28

  [root@ctrl3 ~]# virsh vcpupin 2
  VCPU: CPU Affinity
  ----------------------------------
     0: 2

  [root@ctrl3 ~]# virsh vcpupin 3
  VCPU: CPU Affinity
  ----------------------------------
     0: 44

  [root@ctrl3 ~]# virsh vcpupin 4
  VCPU: CPU Affinity
  ----------------------------------
     0: 0

  [root@ctrl3 ~]# virsh vcpupin 5
  VCPU: CPU Affinity
  ----------------------------------
     0: 16

  [root@ctrl3 ~]# virsh vcpupin 6
  VCPU: CPU Affinity
  ----------------------------------
     0: 18

  * then I did modify section vcpu_pin_set in nova.conf.
     [root@ctrl3 ~]# cat /etc/nova/nova.conf | grep vcpu_pin_set
      vcpu_pin_set = "0-47,^18"

  * then I did restart openstack-nova-compute service
     Log display "Error updating resources for node ctrl3.: CPUPinningUnknown: CPU set to pin [18] must be a subset of known CPU set [28]".
     But this information is wrong, known CPU set is not only [28], it should be [0, 2, 4, 6, 8, 10, 12, 14, 16, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46]

  Expected result
  ===============
  CPUPinningUnknown: CPU set to pin [18] must be a subset of known CPU set [0, 2, 4, 6, 8, 10, 12, 14, 16, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46]

  Actual result
  =============
   CPUPinningUnknown: CPU set to pin [18] must be a subset of known CPU set [28]

  Environment
  ===========
  1. Exact version of OpenStack you are running. See the following
    Pike version

  2. Which hypervisor did you use?
    Libvirt + KVM

  Logs & Configs
  ==============
  /lockutils.py:282
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager [req-8835b3d7-a453-4f91-abfa-5ccd0c54693b - - - - -] Error updating resources for node ctrl3.: CPUPinningUnknown: CPU set to pin [18] must be a subset of known CPU set [28]
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager Traceback (most recent call last):
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 6647, in update_available_resource_for_node
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     rt.update_available_resource(context, nodename)
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 657, in update_available_resource
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     self._update_available_resource(context, resources)
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/oslo_concurrency/lockutils.py", line 271, in inner
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     return f(*args, **kwargs)
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 698, in _update_available_resource
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     self._update_usage_from_instances(context, instances, nodename)
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 1141, in _update_usage_from_instances
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     has_ocata_computes=has_ocata_computes)
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 1077, in _update_usage_from_instance
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     sign=sign)
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/compute/resource_tracker.py", line 875, in _update_usage
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     cn, usage, free)
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/virt/hardware.py", line 1784, in get_host_numa_usage_from_instance
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     host_numa_topology, instance_numa_topology, free=free))
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/virt/hardware.py", line 1640, in numa_usage_from_instances
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     newcell.pin_cpus(pinned_cpus)
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager   File "/usr/lib/python2.7/site-packages/nova/objects/numa.py", line 82, in pin_cpus
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager     cpuset=list(self.pinned_cpus))
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager CPUPinningUnknown: CPU set to pin [18] must be a subset of known CPU set [28]
  2017-11-03 14:44:01.425 32568 ERROR nova.compute.manager

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