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[sahid <sferdjao@xxxxxxxxxx>]

Public bug reported:

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.

** Affects: nova
     Importance: Low
     Assignee: sahid (sahid-ferdjaoui)
         Status: In Progress


** Tags: libvirt

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

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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):
  In Progress

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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