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[Sean Dague <sean@xxxxxxxxx>]

This is actually libvirt itself failing to do live migration, not
anything in Nova. So this really needs to be taken upstream.

** Changed in: nova
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1373949

Title:
  live-migration fails because of CPU feature invtsc

Status in OpenStack Compute (Nova):
  Invalid

Bug description:
  Hi!

  I'm running the latest git nova code from branch stable/icehouse and have patched it to get rid of the "duplicate feature bug"
  (commit 0f28fbef8bedeafca0bf488b84f783568fefc960).
  I'm running libvirt 1.2.8 and qemu 2.0.2.

  When I issue the command to do a live migration nova-compute fails
  with this stack trace:

  2014-09-25 13:51:46.837 16995 ERROR nova.virt.libvirt.driver [-] [instance: 3b8dbddc-ba24-4ec6-bb3b-be227b5fb689] Live Migration failure: Requested operation is not valid: domain has CPU feature: invtsc
  Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/eventlet/hubs/poll.py", line 97, in wait
  readers.get(fileno, noop).cb(fileno)
  File "/usr/lib/python2.7/site-packages/eventlet/greenthread.py", line 194, in main
  result = function(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4595, in _live_migration
  recover_method(context, instance, dest, block_migration)
  File "/usr/lib/python2.7/site-packages/nova/openstack/common/excutils.py", line 68, in __exit__
  six.reraise(self.type_, self.value, self.tb)
  File "/usr/lib/python2.7/site-packages/nova/virt/libvirt/driver.py", line 4589, in _live_migration
  CONF.libvirt.live_migration_bandwidth)
  File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 179, in doit
  result = proxy_call(self._autowrap, f, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 139, in proxy_call
  rv = execute(f,*args,**kwargs)
  File "/usr/lib/python2.7/site-packages/eventlet/tpool.py", line 77, in tworker
  rv = meth(*args,**kwargs)
  File "/usr/lib/python2.7/site-packages/libvirt.py", line 1590, in migrateToURI
  if ret == -1: raise libvirtError ('virDomainMigrateToURI() failed', dom=self)
  libvirtError: Requested operation is not valid: domain has CPU feature: invtsc

  when googling for invtsc it seems to be fairly new feature in libvirt
  (http://www.redhat.com/archives/libvir-list/2014-May/msg00214.html),
  which might be the reason this has not showed up for other people that
  use ubuntu for example.

  Regards
  Daniel Lundqvist

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