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[OpenStack Infra <1496854@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://review.openstack.org/224726
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=f6969afa4708d1702321dcd48062591bd400789e
Submitter: Jenkins
Branch:    master

commit f6969afa4708d1702321dcd48062591bd400789e
Author: Sahid Orentino Ferdjaoui <sahid.ferdjaoui@xxxxxxxxxx>
Date:   Thu Sep 17 09:20:42 2015 -0400

    libvirt: verify cpu bw policy capability for host
    
    In some circumstances mostly related to latency, Linux
    kernel can have been build with cgroup configuration
    CONFIG_CGROUP_SCHED not defined which makes not possible
    to boot virtual machines.
    
    We should verify if that cgroup is well mounted on host
    
    Change-Id: Ia0af28d1f251ec5aac761b6b34b7db46de479dcc
    Closes-Bug: #1496854


** Changed in: nova
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1496854

Title:
  libvirt: CPU tune bw policy not available in some linux kernels

Status in OpenStack Compute (nova):
  Fix Released

Bug description:
  In some circumstances mostly related to latency , Linux kernel can
  have been build with cgroung configuration CONFIG_CGROUP_SCHED not
  defined which makes not possible to boot virtual machines.

  We should to verify if that cgroup is well mounted on host;

    by default if nothing has been requested, we can just pass that "cpu
  shares" default configuration, if a request has been intended so we
  should raise exception to let scheduler tries an other host.

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