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[Bug 1578879] [NEW] Used hugepage of compute node does not include the mem which is used by system process

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: liuxiuli <liu.lixiu@xxxxxxxxxx>
Date: Fri, 06 May 2016 01:44:50 -0000
Reply-to: Bug 1578879 <1578879@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Public bug reported:

Description
===========
There are some system processes which use hugepage when compute node starts. But when we report numa_topology resources, we do not consider these.  And we do not consider it by reserving hugepage.


Expected result
===============
Used NUMAPagesTopology information in compute node is all system used hugepage.  Or we can consider it by reserving hugepage mem.


Actual result
=============
Used hugepage information in compute node is not correct. It can cause select a host which can not build a instance using hugepage. 


Environment
===========
Os which supports KVM and hugepage.  And we build instance which uses hugepage.


Logs & Configs
==============
Flavor include extra_specs hw:mem_page_size=1048576 which instance uses.

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1578879

Title:
  Used hugepage of compute node does not include the mem which is used
  by system process

Status in OpenStack Compute (nova):
  New

Bug description:
  Description
  ===========
  There are some system processes which use hugepage when compute node starts. But when we report numa_topology resources, we do not consider these.  And we do not consider it by reserving hugepage.

  
  Expected result
  ===============
  Used NUMAPagesTopology information in compute node is all system used hugepage.  Or we can consider it by reserving hugepage mem.

  
  Actual result
  =============
  Used hugepage information in compute node is not correct. It can cause select a host which can not build a instance using hugepage. 

  
  Environment
  ===========
  Os which supports KVM and hugepage.  And we build instance which uses hugepage.

  
  Logs & Configs
  ==============
  Flavor include extra_specs hw:mem_page_size=1048576 which instance uses.

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