before live migration
vm test-1 is spawned on uma-migration-2
vm test-2 is spawned on uma-migration-1

both vms are pinned to the same cores on different hosts

<cputune>
    <shares>4096</shares>
    <vcpupin vcpu='0' cpuset='0'/>
    <vcpupin vcpu='1' cpuset='1'/>
    <vcpupin vcpu='2' cpuset='2'/>
    <vcpupin vcpu='3' cpuset='3'/>
    <emulatorpin cpuset='0-3'/>
</cputune>

after migration migrated vm was updated to 

<cputune>
    <shares>4096</shares>
    <vcpupin vcpu='0' cpuset='8'/>
    <vcpupin vcpu='1' cpuset='9'/>
    <vcpupin vcpu='2' cpuset='10'/>
    <vcpupin vcpu='3' cpuset='11'/>
    <emulatorpin cpuset='8-11'/>
</cputune>


-------------------vm test-1 xml--------------------

[centos@numa-migration-2 devstack]$ sudo virsh dumpxml instance-00000005
<domain type='kvm' id='10'>
  <name>instance-00000005</name>
  <uuid>f98cac48-f3a7-450b-b308-72470addf9c5</uuid>
  <metadata>
    <nova:instance xmlns:nova="http://openstack.org/xmlns/libvirt/nova/1.0">
      <nova:package version="18.1.0"/>
      <nova:name>test-1</nova:name>
      <nova:creationTime>2019-02-28 11:55:45</nova:creationTime>
      <nova:flavor name="pinned">
        <nova:memory>128</nova:memory>
        <nova:disk>1</nova:disk>
        <nova:swap>0</nova:swap>
        <nova:ephemeral>0</nova:ephemeral>
        <nova:vcpus>4</nova:vcpus>
      </nova:flavor>
      <nova:owner>
        <nova:user uuid="001e3dc0dba34e8dbf5e08be35e35ed3">admin</nova:user>
        <nova:project uuid="cd45477831e64ea4b9f767d319669b5c">demo</nova:project>
      </nova:owner>
      <nova:root type="image" uuid="2acc1620-3cec-49ff-9926-30021cd2593c"/>
    </nova:instance>
  </metadata>
  <memory unit='KiB'>131072</memory>
  <currentMemory unit='KiB'>131072</currentMemory>
  <vcpu placement='static'>4</vcpu>
  <cputune>
    <shares>4096</shares>
    <vcpupin vcpu='0' cpuset='0'/>
    <vcpupin vcpu='1' cpuset='1'/>
    <vcpupin vcpu='2' cpuset='2'/>
    <vcpupin vcpu='3' cpuset='3'/>
    <emulatorpin cpuset='0-3'/>
  </cputune>
  <numatune>
    <memory mode='strict' nodeset='0'/>
    <memnode cellid='0' mode='strict' nodeset='0'/>
  </numatune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <sysinfo type='smbios'>
    <system>
      <entry name='manufacturer'>OpenStack Foundation</entry>
      <entry name='product'>OpenStack Nova</entry>
      <entry name='version'>18.1.0</entry>
      <entry name='serial'>f98cac48-f3a7-450b-b308-72470addf9c5</entry>
      <entry name='uuid'>f98cac48-f3a7-450b-b308-72470addf9c5</entry>
      <entry name='family'>Virtual Machine</entry>
    </system>
  </sysinfo>
  <os>
    <type arch='x86_64' machine='pc-i440fx-rhel7.6.0'>hvm</type>
    <boot dev='hd'/>
    <smbios mode='sysinfo'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-passthrough' check='none'>
    <topology sockets='4' cores='1' threads='1'/>
    <numa>
      <cell id='0' cpus='0-3' memory='131072' unit='KiB'/>
    </numa>
  </cpu>
  <clock offset='utc'>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/opt/stack/data/nova/instances/f98cac48-f3a7-450b-b308-72470addf9c5/disk'/>
      <backingStore type='file' index='1'>
        <format type='raw'/>
        <source file='/opt/stack/data/nova/instances/_base/d4de12edffd3d7f66abd78da55df52b79a8fbe79'/>
        <backingStore/>
      </backingStore>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <controller type='usb' index='0' model='piix3-uhci'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'>
      <alias name='pci.0'/>
    </controller>
    <interface type='bridge'>
      <mac address='fa:16:3e:ee:29:d9'/>
      <source bridge='br-int'/>
      <virtualport type='openvswitch'>
        <parameters interfaceid='5ec40818-471a-469f-8f81-763a9be554cb'/>
      </virtualport>
      <target dev='tap5ec40818-47'/>
      <model type='virtio'/>
      <mtu size='1450'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/1'/>
      <log file='/opt/stack/data/nova/instances/f98cac48-f3a7-450b-b308-72470addf9c5/console.log' append='off'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/1'>
      <source path='/dev/pts/1'/>
      <log file='/opt/stack/data/nova/instances/f98cac48-f3a7-450b-b308-72470addf9c5/console.log' append='off'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <input type='mouse' bus='ps2'>
      <alias name='input0'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input1'/>
    </input>
    <graphics type='vnc' port='5900' autoport='yes' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <video>
      <model type='cirrus' vram='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <stats period='10'/>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux' relabel='yes'>
    <label>system_u:system_r:svirt_t:s0:c809,c943</label>
    <imagelabel>system_u:object_r:svirt_image_t:s0:c809,c943</imagelabel>
  </seclabel>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+107:+107</label>
    <imagelabel>+107:+107</imagelabel>
  </seclabel>
</domain>

--------------------vm test-2 xml---------------------------


[centos@numa-migration-1 devstack]$ sudo virsh dumpxml instance-00000006
<domain type='kvm' id='4'>
  <name>instance-00000006</name>
  <uuid>47edc697-01e4-4dfd-8c81-5625c566e53b</uuid>
  <metadata>
    <nova:instance xmlns:nova="http://openstack.org/xmlns/libvirt/nova/1.0">
      <nova:package version="18.1.0"/>
      <nova:name>test-2</nova:name>
      <nova:creationTime>2019-02-28 11:55:45</nova:creationTime>
      <nova:flavor name="pinned">
        <nova:memory>128</nova:memory>
        <nova:disk>1</nova:disk>
        <nova:swap>0</nova:swap>
        <nova:ephemeral>0</nova:ephemeral>
        <nova:vcpus>4</nova:vcpus>
      </nova:flavor>
      <nova:owner>
        <nova:user uuid="001e3dc0dba34e8dbf5e08be35e35ed3">admin</nova:user>
        <nova:project uuid="cd45477831e64ea4b9f767d319669b5c">demo</nova:project>
      </nova:owner>
      <nova:root type="image" uuid="2acc1620-3cec-49ff-9926-30021cd2593c"/>
    </nova:instance>
  </metadata>
  <memory unit='KiB'>131072</memory>
  <currentMemory unit='KiB'>131072</currentMemory>
  <vcpu placement='static'>4</vcpu>
  <cputune>
    <shares>4096</shares>
    <vcpupin vcpu='0' cpuset='0'/>
    <vcpupin vcpu='1' cpuset='1'/>
    <vcpupin vcpu='2' cpuset='2'/>
    <vcpupin vcpu='3' cpuset='3'/>
    <emulatorpin cpuset='0-3'/>
  </cputune>
  <numatune>
    <memory mode='strict' nodeset='0'/>
    <memnode cellid='0' mode='strict' nodeset='0'/>
  </numatune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <sysinfo type='smbios'>
    <system>
      <entry name='manufacturer'>OpenStack Foundation</entry>
      <entry name='product'>OpenStack Nova</entry>
      <entry name='version'>18.1.0</entry>
      <entry name='serial'>47edc697-01e4-4dfd-8c81-5625c566e53b</entry>
      <entry name='uuid'>47edc697-01e4-4dfd-8c81-5625c566e53b</entry>
      <entry name='family'>Virtual Machine</entry>
    </system>
  </sysinfo>
  <os>
    <type arch='x86_64' machine='pc-i440fx-rhel7.6.0'>hvm</type>
    <boot dev='hd'/>
    <smbios mode='sysinfo'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-passthrough' check='none'>
    <topology sockets='4' cores='1' threads='1'/>
    <numa>
      <cell id='0' cpus='0-3' memory='131072' unit='KiB'/>
    </numa>
  </cpu>
  <clock offset='utc'>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/opt/stack/data/nova/instances/47edc697-01e4-4dfd-8c81-5625c566e53b/disk'/>
      <backingStore type='file' index='1'>
        <format type='raw'/>
        <source file='/opt/stack/data/nova/instances/_base/d4de12edffd3d7f66abd78da55df52b79a8fbe79'/>
        <backingStore/>
      </backingStore>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <controller type='usb' index='0' model='piix3-uhci'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'>
      <alias name='pci.0'/>
    </controller>
    <interface type='bridge'>
      <mac address='fa:16:3e:77:9e:ef'/>
      <source bridge='br-int'/>
      <virtualport type='openvswitch'>
        <parameters interfaceid='c339a559-15b8-4b35-8e9d-f47edbdd7cf7'/>
      </virtualport>
      <target dev='tapc339a559-15'/>
      <model type='virtio'/>
      <mtu size='1450'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/1'/>
      <log file='/opt/stack/data/nova/instances/47edc697-01e4-4dfd-8c81-5625c566e53b/console.log' append='off'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/1'>
      <source path='/dev/pts/1'/>
      <log file='/opt/stack/data/nova/instances/47edc697-01e4-4dfd-8c81-5625c566e53b/console.log' append='off'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <input type='mouse' bus='ps2'>
      <alias name='input0'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input1'/>
    </input>
    <graphics type='vnc' port='5900' autoport='yes' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <video>
      <model type='cirrus' vram='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <stats period='10'/>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux' relabel='yes'>
    <label>system_u:system_r:svirt_t:s0:c28,c62</label>
    <imagelabel>system_u:object_r:svirt_image_t:s0:c28,c62</imagelabel>
  </seclabel>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+107:+107</label>
    <imagelabel>+107:+107</imagelabel>
  </seclabel>
</domain>




after migration

[centos@numa-migration-2 devstack]$ sudo virsh dumpxml instance-00000006
<domain type='kvm' id='11'>
  <name>instance-00000006</name>
  <uuid>47edc697-01e4-4dfd-8c81-5625c566e53b</uuid>
  <metadata>
    <nova:instance xmlns:nova="http://openstack.org/xmlns/libvirt/nova/1.0">
      <nova:package version="18.1.0"/>
      <nova:name>test-2</nova:name>
      <nova:creationTime>2019-02-28 11:55:45</nova:creationTime>
      <nova:flavor name="pinned">
        <nova:memory>128</nova:memory>
        <nova:disk>1</nova:disk>
        <nova:swap>0</nova:swap>
        <nova:ephemeral>0</nova:ephemeral>
        <nova:vcpus>4</nova:vcpus>
      </nova:flavor>
      <nova:owner>
        <nova:user uuid="001e3dc0dba34e8dbf5e08be35e35ed3">admin</nova:user>
        <nova:project uuid="cd45477831e64ea4b9f767d319669b5c">demo</nova:project>
      </nova:owner>
      <nova:root type="image" uuid="2acc1620-3cec-49ff-9926-30021cd2593c"/>
    </nova:instance>
  </metadata>
  <memory unit='KiB'>131072</memory>
  <currentMemory unit='KiB'>131072</currentMemory>
  <vcpu placement='static'>4</vcpu>
  <cputune>
    <shares>4096</shares>
    <vcpupin vcpu='0' cpuset='8'/>
    <vcpupin vcpu='1' cpuset='9'/>
    <vcpupin vcpu='2' cpuset='10'/>
    <vcpupin vcpu='3' cpuset='11'/>
    <emulatorpin cpuset='8-11'/>
  </cputune>
  <numatune>
    <memory mode='strict' nodeset='0'/>
    <memnode cellid='0' mode='strict' nodeset='1'/>
  </numatune>
  <resource>
    <partition>/machine</partition>
  </resource>
  <sysinfo type='smbios'>
    <system>
      <entry name='manufacturer'>OpenStack Foundation</entry>
      <entry name='product'>OpenStack Nova</entry>
      <entry name='version'>18.1.0</entry>
      <entry name='serial'>47edc697-01e4-4dfd-8c81-5625c566e53b</entry>
      <entry name='uuid'>47edc697-01e4-4dfd-8c81-5625c566e53b</entry>
      <entry name='family'>Virtual Machine</entry>
    </system>
  </sysinfo>
  <os>
    <type arch='x86_64' machine='pc-i440fx-rhel7.6.0'>hvm</type>
    <boot dev='hd'/>
    <smbios mode='sysinfo'/>
  </os>
  <features>
    <acpi/>
    <apic/>
  </features>
  <cpu mode='host-passthrough' check='none'>
    <topology sockets='4' cores='1' threads='1'/>
    <numa>
      <cell id='0' cpus='0-3' memory='131072' unit='KiB'/>
    </numa>
  </cpu>
  <clock offset='utc'>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <emulator>/usr/libexec/qemu-kvm</emulator>
    <disk type='file' device='disk'>
      <driver name='qemu' type='qcow2' cache='none'/>
      <source file='/opt/stack/data/nova/instances/47edc697-01e4-4dfd-8c81-5625c566e53b/disk'/>
      <backingStore type='file' index='1'>
        <format type='raw'/>
        <source file='/opt/stack/data/nova/instances/_base/d4de12edffd3d7f66abd78da55df52b79a8fbe79'/>
        <backingStore/>
      </backingStore>
      <target dev='vda' bus='virtio'/>
      <alias name='virtio-disk0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
    </disk>
    <controller type='usb' index='0' model='piix3-uhci'>
      <alias name='usb'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
    </controller>
    <controller type='pci' index='0' model='pci-root'>
      <alias name='pci.0'/>
    </controller>
    <interface type='bridge'>
      <mac address='fa:16:3e:77:9e:ef'/>
      <source bridge='br-int'/>
      <virtualport type='openvswitch'>
        <parameters interfaceid='c339a559-15b8-4b35-8e9d-f47edbdd7cf7'/>
      </virtualport>
      <target dev='tapc339a559-15'/>
      <model type='virtio'/>
      <mtu size='1450'/>
      <alias name='net0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
    </interface>
    <serial type='pty'>
      <source path='/dev/pts/2'/>
      <log file='/opt/stack/data/nova/instances/47edc697-01e4-4dfd-8c81-5625c566e53b/console.log' append='off'/>
      <target type='isa-serial' port='0'>
        <model name='isa-serial'/>
      </target>
      <alias name='serial0'/>
    </serial>
    <console type='pty' tty='/dev/pts/2'>
      <source path='/dev/pts/2'/>
      <log file='/opt/stack/data/nova/instances/47edc697-01e4-4dfd-8c81-5625c566e53b/console.log' append='off'/>
      <target type='serial' port='0'/>
      <alias name='serial0'/>
    </console>
    <input type='mouse' bus='ps2'>
      <alias name='input0'/>
    </input>
    <input type='keyboard' bus='ps2'>
      <alias name='input1'/>
    </input>
    <graphics type='vnc' port='5901' autoport='yes' listen='0.0.0.0'>
      <listen type='address' address='0.0.0.0'/>
    </graphics>
    <video>
      <model type='cirrus' vram='16384' heads='1' primary='yes'/>
      <alias name='video0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
    </video>
    <memballoon model='virtio'>
      <stats period='10'/>
      <alias name='balloon0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/>
    </memballoon>
  </devices>
  <seclabel type='dynamic' model='selinux' relabel='yes'>
    <label>system_u:system_r:svirt_t:s0:c268,c426</label>
    <imagelabel>system_u:object_r:svirt_image_t:s0:c268,c426</imagelabel>
  </seclabel>
  <seclabel type='dynamic' model='dac' relabel='yes'>
    <label>+107:+107</label>
    <imagelabel>+107:+107</imagelabel>
  </seclabel>
</domain>