Bug 1054416

Description of problem:

  When I try to define the numa configuration of a guest on a system running
  rhel7.0, the changes don't seem to be reflected in the guest.  

  This is a regression from rhel6.5.

  For example, if I edit the guest's xml using virsh edit to include the <numa>
  directives to define the guest as 4 numa nodes and then power off the guest and
  and restart it, a numactl -H command executed on the guest still shows the 
  guest as 1 numa node.

  My OS is RHEL7.0:  3.10.0-60.el7.x86_64
  libvirt is 1.1.1-18.el7
  qemu-kvm is 1.5.3-34.el7
  virt-manager 0.10.0-9.el7

  [root@harp33-sys ~]# virsh nodeinfo
  CPU model:           x86_64
  CPU(s):              64
  CPU frequency:       2499 MHz
  CPU socket(s):       1
  Core(s) per socket:  8
  Thread(s) per core:  1
  NUMA cell(s):        8
  Memory size:         189209916 KiB
  [root@harp33-sys ~]# virsh dominfo vhost1
  Id:             2
  Name:           vhost1
  UUID:           503397c0-58cd-462a-b2a2-52bb7b8225ba
  OS Type:        hvm
  State:          running
  CPU(s):         32
  CPU time:       117.0s
  Max memory:     8290304 KiB
  Used memory:    8290304 KiB
  Persistent:     yes
  Autostart:      disable
  Managed save:   no
  Security model: none
  Security DOI:   0

  I updated the guests xml file to include the following:

  domain type='kvm' id='2'>
    <name>vhost1</name>
    <uuid>503397c0-58cd-462a-b2a2-52bb7b8225ba</uuid>
    <memory unit='KiB'>8290304</memory>
    <currentMemory unit='KiB'>8290304</currentMemory>
    <vcpu placement='static'>32</vcpu>
    <cputune>
      <vcpupin vcpu='0' cpuset='0'/>
      <vcpupin vcpu='1' cpuset='1'/>
      <vcpupin vcpu='2' cpuset='2'/>
      <vcpupin vcpu='3' cpuset='3'/>
      <vcpupin vcpu='4' cpuset='4'/>
      <vcpupin vcpu='5' cpuset='5'/>
      <vcpupin vcpu='6' cpuset='6'/>
      <vcpupin vcpu='7' cpuset='7'/>
      <vcpupin vcpu='8' cpuset='8'/>
      <vcpupin vcpu='9' cpuset='9'/>
      <vcpupin vcpu='10' cpuset='10'/>
      <vcpupin vcpu='11' cpuset='11'/>
      <vcpupin vcpu='12' cpuset='12'/>
      <vcpupin vcpu='13' cpuset='13'/>
      <vcpupin vcpu='14' cpuset='14'/>
      <vcpupin vcpu='15' cpuset='15'/>
      <vcpupin vcpu='16' cpuset='16'/>
      <vcpupin vcpu='17' cpuset='17'/>
      <vcpupin vcpu='18' cpuset='18'/>
      <vcpupin vcpu='19' cpuset='19'/>
      <vcpupin vcpu='20' cpuset='20'/>
      <vcpupin vcpu='21' cpuset='21'/>
      <vcpupin vcpu='22' cpuset='22'/>
      <vcpupin vcpu='23' cpuset='23'/>
      <vcpupin vcpu='24' cpuset='24'/>
      <vcpupin vcpu='25' cpuset='25'/>
      <vcpupin vcpu='26' cpuset='26'/>
      <vcpupin vcpu='27' cpuset='27'/>
      <vcpupin vcpu='28' cpuset='28'/>
      <vcpupin vcpu='29' cpuset='29'/>
      <vcpupin vcpu='30' cpuset='30'/>
      <vcpupin vcpu='31' cpuset='31'/>
    </cputune>
    <resource>
      <partition>/machine</partition>
    </resource>
    <os>
      <type arch='x86_64' machine='pc-i440fx-rhel7.0.0'>hvm</type>
      <boot dev='hd'/>
    </os>
    <features>
      <acpi/>
      <apic/>
      <pae/>
    </features>
    <cpu>
      <topology sockets='4' cores='8' threads='1'/>
      <numa>
	<cell cpus='0-7' memory='2072576'/>
	<cell cpus='8-15' memory='2072576'/>
	<cell cpus='16-23' memory='2072576'/>
	<cell cpus='24-31' memory='2072576'/>
      </numa>
    </cpu>

  Then I shutdown (forced off) the guest and restarted it.  I then did a numactl -H
  command on the guest:

  [root@vhost1 ~]# numactl -H
  available: 1 nodes (0)
  node 0 cpus: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
  node 0 size: 8095 MB
  node 0 free: 7504 MB
  node distances:
  node   0 
    0:  10 

  I would have included the /var/log/libvirt/libvirtd.log file, but I couldn't
  find it on the host.  Has the libvirtd.log file been moved in rhel7.0?


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