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[lica <licayun@xxxxxxxxx>]

Public bug reported:

environment info:
OS：centos7.1
nova:15.0.2

problem description:
There are 220G memory in compute-node.The 200G of them are hugepages.The page_size is 1G.
Other 20G of them are normal memorys.

When I boot a normal instance with the flavor of 30G mem and no hugepages.
The instance is created successfully.But the OS become unstable even OOM because memory exhausted

I think the instance should boot failed with ram_filter return 0 hosts.Rather than think that the memory is sufficient
and spawn the instance in that compute_node

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1689753

Title:
  ram_filter fail when computer-node has hugepages

Status in OpenStack Compute (nova):
  New

Bug description:
  environment info:
  OS：centos7.1
  nova:15.0.2

  problem description:
  There are 220G memory in compute-node.The 200G of them are hugepages.The page_size is 1G.
  Other 20G of them are normal memorys.

  When I boot a normal instance with the flavor of 30G mem and no hugepages.
  The instance is created successfully.But the OS become unstable even OOM because memory exhausted

  I think the instance should boot failed with ram_filter return 0 hosts.Rather than think that the memory is sufficient
  and spawn the instance in that compute_node

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