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[Eric Fried <efried@xxxxxxxxxx>]

*** This bug is a duplicate of bug 1729621 ***
    https://bugs.launchpad.net/bugs/1729621

** This bug has been marked a duplicate of bug 1729621
   Inconsistent value for vcpu_used

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https://bugs.launchpad.net/bugs/1777491

Title:
  Avoid redundant compute node update

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  _update_available_resource() in nova/compute/resource_tracker.py invokes _init_compute_node() which internally calls _update() and once again _update() is invoked at the end of _update_available_resource().
  https://github.com/openstack/nova/blob/master/nova/compute/resource_tracker.py#L762

  This triggers update_provider_tree() or get_inventory() on the virt
  driver, scanning all resources twice within same method.

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