Public bug reported:

[ubuntu 14.04 amd64 on Mac Mini, fully up to date]

The "virsh memtune" function (see
ftp://libvirt.org/libvirt/virshcmdref/html/sect-memtune.html) completely
fails with LXC guests; it looks to be some sort of protocol/ABI problem.

--------------------------------
$ virsh -c lxc:
...
virsh # memtune gold-lxc-20140717
error: Unable to get number of memory parameters
error: unsupported flags (0x4) in function lxcDomainGetMemoryParameters
--------------------------------


Here is the XML for this guest:

virsh # dumpxml gold-lxc-20140717
<domain type='lxc' id='6265'>
  <name>gold-lxc-20140717</name>
  <uuid>b2a02d49-bb1e-4aec-81d1-58910892780e</uuid>
  <memory unit='KiB'>327680</memory>
  <currentMemory unit='KiB'>327680</currentMemory>
  <vcpu placement='static'>1</vcpu>
  <resource>
    <partition>/machine</partition>
  </resource>
  <os>
    <type arch='x86_64'>exe</type>
    <init>/sbin/init</init>
  </os>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/lib/libvirt/libvirt_lxc</emulator>
    <filesystem type='mount' accessmode='passthrough'>
      <source dir='/data1/lxc/gold-20140717/rootfs'/>
      <target dir='/'/>
    </filesystem>
    <interface type='bridge'>
      <mac address='52:54:5d:00:0a:88'/>
      <source bridge='br-lan'/>
      <target dev='vnet0'/>
    </interface>
    <console type='pty' tty='/dev/pts/1'>
      <source path='/dev/pts/1'/>
      <target type='lxc' port='0'/>
      <alias name='console0'/>
    </console>
  </devices>
  <seclabel type='none'/>
</domain>

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: libvirt-bin 1.2.2-0ubuntu13.1.1
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
Date: Fri Jul 25 14:25:11 2014
InstallationDate: Installed on 2014-07-16 (8 days ago)
InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 
(20140416.2)
SourcePackage: libvirt
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.libvirt.qemu.conf: [inaccessible: [Errno 13] Permission 
denied: '/etc/libvirt/qemu.conf']

** Affects: libvirt (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

-- 
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https://bugs.launchpad.net/bugs/1348672

Title:
  virsh memtune fails with LXC guests (lxcDomainGetMemoryParameters)

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