Centos 7 com libvirt, Kvm e balão consome 100% cpu em todas as versões do windows

Question

O Windows funciona perfeitamente, mas o balão não funciona, depois de definir a memória mínima e máxima e ativar o serviço BLNSVR, o Windows começa a consumir 100% da CPU. Se colocar memória mínima e máxima igual ao consumo da CPU retorna ao normal e se manter a memória mínima diferente do máximo e desabilitar o serviço BLNSVR a CPU também retorna à operação normal. Testado no libvirt padrão e KVM do CentOs 7 e do Epel-release e versão alternativa libvirt 3.4 e QEMU 2.9. Meu Kernel é 3.10.0-514.26.2.el7.x86_64.

Minha libvirt é:

<domain type='kvm'>
    <name>win2008r2</name>
    <uuid>1190af9e-cd02-47d2-8bb4-6b9ce6d7cdfc</uuid>
    <memory unit='KiB'>4194304</memory>
    <currentMemory unit='KiB'>4194304</currentMemory>
    <vcpu placement='static'>8</vcpu>
    <os>
        <type arch='x86_64' machine='pc-i440fx-2.9'>hvm</type>
        <boot dev='hd'/>
    </os>
    <features>
        <acpi/>
        <apic/>
        <hyperv>
            <relaxed state='on'/>
            <vapic state='on'/>
            <spinlocks state='on' retries='8191'/>
        </hyperv>
        <vmport state='off'/>
    </features>
    <cpu mode='custom' match='exact' check='partial'>
        <model fallback='allow'>kvm64</model>
        <topology sockets='2' cores='4' threads='1'/>
    </cpu>
    <clock offset='localtime'>
        <timer name='rtc' tickpolicy='catchup'/>
        <timer name='pit' tickpolicy='delay'/>
        <timer name='hpet' present='no'/>
        <timer name='hypervclock' present='yes'/>
    </clock>
    <on_poweroff>destroy</on_poweroff>
    <on_reboot>restart</on_reboot>
    <on_crash>destroy</on_crash>
    <pm>
        <suspend-to-mem enabled='no'/>
        <suspend-to-disk enabled='no'/>
    </pm>
    <devices>
        <emulator>/usr/libexec/qemu-kvm</emulator>
        <disk type='file' device='disk'>
            <driver name='qemu' type='qcow2'/>
            <source file='/home/kvm/win2008r2.qcow2'/>
            <target dev='vda' bus='virtio'/>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x08' function='0x0'/>
        </disk>
        <disk type='file' device='cdrom'>
            <driver name='qemu' type='raw'/>
            <source file='/home/iso/virtio-win.iso'/>
            <target dev='hdb' bus='ide'/>
            <readonly/>
            <address type='drive' controller='0' bus='0' target='0' unit='1'/>
        </disk>
        <controller type='usb' index='0' model='ich9-ehci1'>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x7'/>
        </controller>
        <controller type='usb' index='0' model='ich9-uhci1'>
            <master startport='0'/>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0' multifunction='on'/>
        </controller>
        <controller type='usb' index='0' model='ich9-uhci2'>
            <master startport='2'/>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x1'/>
        </controller>
        <controller type='usb' index='0' model='ich9-uhci3'>
            <master startport='4'/>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x2'/>
        </controller>
        <controller type='pci' index='0' model='pci-root'/>
        <controller type='ide' index='0'>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
        </controller>
        <controller type='virtio-serial' index='0'>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
        </controller>
        <interface type='direct'>
            <mac address='52:54:00:75:df:96'/>
            <source dev='eno2.999' mode='bridge'/>
            <model type='virtio'/>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
        </interface>
        <serial type='pty'>
            <target port='0'/>
        </serial>
        <console type='pty'>
            <target type='serial' port='0'/>
        </console>
        <channel type='spicevmc'>
            <target type='virtio' name='com.redhat.spice.0'/>
            <address type='virtio-serial' controller='0' bus='0' port='1'/>
        </channel>
        <input type='tablet' bus='usb'>
            <address type='usb' bus='0' port='1'/>
        </input>
        <input type='mouse' bus='ps2'/>
        <input type='keyboard' bus='ps2'/>
        <graphics type='spice' autoport='yes'>
            <listen type='address'/>
            <image compression='off'/>
        </graphics>
        <sound model='ich6'>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
        </sound>
        <video>
            <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1' primary='yes'/>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
        </video>
        <redirdev bus='usb' type='spicevmc'>
            <address type='usb' bus='0' port='2'/>
        </redirdev>
        <redirdev bus='usb' type='spicevmc'>
            <address type='usb' bus='0' port='3'/>
        </redirdev>
        <memballoon model='virtio'>
            <address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
        </memballoon>
    </devices>
</domain>