------- Comment From [email protected] 2018-01-02 07:24 EDT-------
(In reply to comment #38)
> on xenial still i am seeing the issue.
> Machine details:
> 1)kernel level
> root@ltc84-pkvm1:/var/lib/libvirt/images# uname -a
> Linux ltc84-pkvm1 4.4.0-104-generic #127-Ubuntu SMP Mon Dec 11 12:16:48 UTC
> 2017 ppc64le ppc64le ppc64le GNU/Linux
>

xenial kernel version -> 4.4.x?    Looks like not used HWE kernel.

> 2) slof package level:slof package level:
> root@ltc84-pkvm1:/var/lib/libvirt/images# dpkg -l | grep slof
> ii  qemu-slof                           20151103+dfsg-1ubuntu1
> all          Slimline Open Firmware -- QEMU PowerPC version
>
> 3)boot the guest with following xml:
>
> <domain type='kvm' id='2'>
>   <name>prudhvi_ubuntu</name>
>   <uuid>d8466153-2ee3-4fed-8275-6c31d34f6dd6</uuid>
>   <memory unit='KiB'>33554432</memory>
>   <currentMemory unit='KiB'>33554432</currentMemory>
>   <vcpu placement='static'>32</vcpu>
>   <resource>
>     <partition>/machine</partition>
>   </resource>
>   <os>
>     <type arch='ppc64le' machine='pseries-xenial'>hvm</type>
>   </os>
>   <cpu>
>     <topology sockets='1' cores='4' threads='8'/>
>   </cpu>
>   <clock offset='utc'/>
>   <on_poweroff>destroy</on_poweroff>
>   <on_reboot>restart</on_reboot>
>   <on_crash>restart</on_crash>
>   <devices>
>     <emulator>/usr/bin/kvm</emulator>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/ubuntu-16.04.3-ppc64le.qcow2'/>
>       <backingStore/>
>       <target dev='vda' bus='virtio'/>
>       <boot order='1'/>
>       <alias name='virtio-disk0'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x03'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t1.qcow'/>
>       <backingStore/>
>       <target dev='vdc' bus='virtio'/>
>       <boot order='2'/>
>       <alias name='virtio-disk2'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x06'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t2.qcow'/>
>       <backingStore/>
>       <target dev='vdd' bus='virtio'/>
>       <boot order='3'/>
>       <alias name='virtio-disk3'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x07'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t3.qcow'/>
>       <backingStore/>
>       <target dev='vde' bus='virtio'/>
>       <boot order='4'/>
>       <alias name='virtio-disk4'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x08'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t4.qcow'/>
>       <backingStore/>
>       <target dev='vdf' bus='virtio'/>
>       <boot order='5'/>
>       <alias name='virtio-disk5'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x09'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t5.qcow'/>
>       <backingStore/>
>       <target dev='vdg' bus='virtio'/>
>       <boot order='6'/>
>       <alias name='virtio-disk6'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x0a'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t6.qcow'/>
>       <backingStore/>
>       <target dev='vdh' bus='virtio'/>
>       <boot order='7'/>
>       <alias name='virtio-disk7'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x0b'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t7.qcow'/>
>       <backingStore/>
>       <target dev='vdi' bus='virtio'/>
>       <boot order='8'/>
>       <alias name='virtio-disk8'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x0c'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t8.qcow'/>
>       <backingStore/>
>       <target dev='vdj' bus='virtio'/>
>       <boot order='9'/>
>       <alias name='virtio-disk9'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x0d'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t9.qcow'/>
>       <backingStore/>
>       <target dev='vdk' bus='virtio'/>
>       <boot order='10'/>
>       <alias name='virtio-disk10'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x0e'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t10.qcow'/>
>       <backingStore/>
>       <target dev='vdl' bus='virtio'/>
>       <boot order='11'/>
>       <alias name='virtio-disk11'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x0f'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t11.qcow'/>
>       <backingStore/>
>       <target dev='vdm' bus='virtio'/>
>       <boot order='12'/>
>       <alias name='virtio-disk12'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x10'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t12.qcow'/>
>       <backingStore/>
>       <target dev='vdn' bus='virtio'/>
>       <boot order='13'/>
>       <alias name='virtio-disk13'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x11'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t13.qcow'/>
>       <backingStore/>
>       <target dev='vdo' bus='virtio'/>
>       <boot order='14'/>
>       <alias name='virtio-disk14'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x12'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t14.qcow'/>
>       <backingStore/>
>       <target dev='vdp' bus='virtio'/>
>       <boot order='15'/>
>       <alias name='virtio-disk15'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x13'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t15.qcow'/>
>       <backingStore/>
>       <target dev='vdq' bus='virtio'/>
>       <boot order='16'/>
>       <alias name='virtio-disk16'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x14'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t16.qcow'/>
>       <backingStore/>
>       <target dev='vdr' bus='virtio'/>
>       <boot order='17'/>
>       <alias name='virtio-disk17'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x15'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t17.qcow'/>
>       <backingStore/>
>       <target dev='vds' bus='virtio'/>
>       <boot order='18'/>
>       <alias name='virtio-disk18'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x16'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t18.qcow'/>
>       <backingStore/>
>       <target dev='vdt' bus='virtio'/>
>       <boot order='19'/>
>       <alias name='virtio-disk19'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x17'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t19.qcow'/>
>       <backingStore/>
>       <target dev='vdu' bus='virtio'/>
>       <boot order='20'/>
>       <alias name='virtio-disk20'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x18'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t20.qcow'/>
>       <backingStore/>
>       <target dev='vdv' bus='virtio'/>
>       <boot order='21'/>
>       <alias name='virtio-disk21'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x19'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t21.qcow'/>
>       <backingStore/>
>       <target dev='vdw' bus='virtio'/>
>       <boot order='22'/>
>       <alias name='virtio-disk22'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x1a'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t22.qcow'/>
>       <backingStore/>
>       <target dev='vdx' bus='virtio'/>
>       <boot order='23'/>
>       <alias name='virtio-disk23'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x1b'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t23.qcow'/>
>       <backingStore/>
>       <target dev='vdy' bus='virtio'/>
>       <boot order='24'/>
>       <alias name='virtio-disk24'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x1c'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-t24.qcow'/>
>       <backingStore/>
>       <target dev='vdz' bus='virtio'/>
>       <boot order='25'/>
>       <alias name='virtio-disk25'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x1d'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb1.qcow'/>
>       <backingStore/>
>       <target dev='vdbc' bus='virtio'/>
>       <boot order='26'/>
>       <alias name='virtio-disk54'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x1e'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb2.qcow'/>
>       <backingStore/>
>       <target dev='vdbd' bus='virtio'/>
>       <boot order='27'/>
>       <alias name='virtio-disk55'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x1f'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb3.qcow'/>
>       <backingStore/>
>       <target dev='vdbe' bus='virtio'/>
>       <boot order='28'/>
>       <alias name='virtio-disk56'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x01'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb4.qcow'/>
>       <backingStore/>
>       <target dev='vdbf' bus='virtio'/>
>       <boot order='29'/>
>       <alias name='virtio-disk57'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x02'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb5.qcow'/>
>       <backingStore/>
>       <target dev='vdbg' bus='virtio'/>
>       <boot order='30'/>
>       <alias name='virtio-disk58'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x03'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb6.qcow'/>
>       <backingStore/>
>       <target dev='vdbh' bus='virtio'/>
>       <boot order='31'/>
>       <alias name='virtio-disk59'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x04'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb7.qcow'/>
>       <backingStore/>
>       <target dev='vdbi' bus='virtio'/>
>       <boot order='32'/>
>       <alias name='virtio-disk60'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x05'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb8.qcow'/>
>       <backingStore/>
>       <target dev='vdbj' bus='virtio'/>
>       <boot order='33'/>
>       <alias name='virtio-disk61'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x06'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb9.qcow'/>
>       <backingStore/>
>       <target dev='vdbk' bus='virtio'/>
>       <boot order='34'/>
>       <alias name='virtio-disk62'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x07'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb10.qcow'/>
>       <backingStore/>
>       <target dev='vdbl' bus='virtio'/>
>       <boot order='35'/>
>       <alias name='virtio-disk63'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x08'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb11.qcow'/>
>       <backingStore/>
>       <target dev='vdbm' bus='virtio'/>
>       <boot order='36'/>
>       <alias name='virtio-disk64'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x09'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb12.qcow'/>
>       <backingStore/>
>       <target dev='vdbn' bus='virtio'/>
>       <boot order='37'/>
>       <alias name='virtio-disk65'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x0a'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb13.qcow'/>
>       <backingStore/>
>       <target dev='vdbo' bus='virtio'/>
>       <boot order='38'/>
>       <alias name='virtio-disk66'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x0b'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb14.qcow'/>
>       <backingStore/>
>       <target dev='vdbp' bus='virtio'/>
>       <boot order='39'/>
>       <alias name='virtio-disk67'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x0c'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb15.qcow'/>
>       <backingStore/>
>       <target dev='vdbq' bus='virtio'/>
>       <boot order='40'/>
>       <alias name='virtio-disk68'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x0d'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb16.qcow'/>
>       <backingStore/>
>       <target dev='vdbr' bus='virtio'/>
>       <boot order='41'/>
>       <alias name='virtio-disk69'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x0e'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb17.qcow'/>
>       <backingStore/>
>       <target dev='vdbs' bus='virtio'/>
>       <boot order='42'/>
>       <alias name='virtio-disk70'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x0f'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb18.qcow'/>
>       <backingStore/>
>       <target dev='vdbt' bus='virtio'/>
>       <boot order='43'/>
>       <alias name='virtio-disk71'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x10'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb19.qcow'/>
>       <backingStore/>
>       <target dev='vdbu' bus='virtio'/>
>       <boot order='44'/>
>       <alias name='virtio-disk72'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x11'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb20.qcow'/>
>       <backingStore/>
>       <target dev='vdbv' bus='virtio'/>
>       <boot order='45'/>
>       <alias name='virtio-disk73'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x12'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb21.qcow'/>
>       <backingStore/>
>       <target dev='vdbw' bus='virtio'/>
>       <boot order='46'/>
>       <alias name='virtio-disk74'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x13'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb22.qcow'/>
>       <backingStore/>
>       <target dev='vdbx' bus='virtio'/>
>       <boot order='47'/>
>       <alias name='virtio-disk75'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x14'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb23.qcow'/>
>       <backingStore/>
>       <target dev='vdby' bus='virtio'/>
>       <boot order='48'/>
>       <alias name='virtio-disk76'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x15'
> function='0x0'/>
>     </disk>
>     <disk type='file' device='disk'>
>       <driver name='qemu' type='qcow2'/>
>       <source file='/var/lib/libvirt/images/cpaelzer-bionic-tb24.qcow'/>
>       <backingStore/>
>       <target dev='vdbz' bus='virtio'/>
>       <boot order='49'/>
>       <alias name='virtio-disk77'/>
>       <address type='pci' domain='0x0000' bus='0x01' slot='0x16'
> function='0x0'/>
>     </disk>
>     <controller type='usb' index='0'>
>       <alias name='usb'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x02'
> function='0x0'/>
>     </controller>
>     <controller type='pci' index='0' model='pci-root'>
>       <alias name='pci.0'/>
>     </controller>
>     <controller type='pci' index='1' model='pci-bridge'>
>       <model name='pci-bridge'/>
>       <target chassisNr='1'/>
>       <alias name='pci.1'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x05'
> function='0x0'/>
>     </controller>
>     <interface type='bridge'>
>       <mac address='52:54:00:47:48:50'/>
>       <source bridge='virbr0'/>
>       <target dev='vnet0'/>
>       <model type='virtio'/>
>       <alias name='net0'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x01'
> function='0x0'/>
>     </interface>
>     <serial type='pty'>
>       <source path='/dev/pts/1'/>
>       <target port='0'/>
>       <alias name='serial0'/>
>       <address type='spapr-vio' reg='0x30000000'/>
>     </serial>
>     <console type='pty' tty='/dev/pts/1'>
>       <source path='/dev/pts/1'/>
>       <target type='serial' port='0'/>
>       <alias name='serial0'/>
>       <address type='spapr-vio' reg='0x30000000'/>
>     </console>
>     <memballoon model='virtio'>
>       <alias name='balloon0'/>
>       <address type='pci' domain='0x0000' bus='0x00' slot='0x04'
> function='0x0'/>
>     </memballoon>
>     <panic model='pseries'/>
>   </devices>
>   <seclabel type='dynamic' model='apparmor' relabel='yes'>
>     <label>libvirt-d8466153-2ee3-4fed-8275-6c31d34f6dd6</label>
>     <imagelabel>libvirt-d8466153-2ee3-4fed-8275-6c31d34f6dd6</imagelabel>
>   </seclabel>
> </domain>
>
> expected result:
> -----------------------
> Vm should boot with out any issue.
>
> actual result:
> -----------------
> unable to boot.
> on guest dmesg following error seen.
>
> 3fe >
>
> ( 300 ) Data Storage Exception [ 7e45b010 ]
>
>
>     R0 .. R7           R8 .. R15         R16 .. R23         R24 .. R31
> 000000007dbe0308   000000007dc45000   0000000000000000   0000000000000000
> 000000007e45e6f0   000000007dbfe0a8   0000000000000000   0000000000000006
> 000000007dbffc00   000000007dbe0d34   0000000000000000   000000007dbf6800
> 000000007dc45000   0000000000000040   000000007dbe0d54   000000007e45f060
> ffffffffffffffff   0000000000000001   000000007dbfe070   000000007dbf92b0
> 000000007e45b010   0000000000000000   0000000000000005   0000000000000003
> 000000007dc44ff8   0000000000000000   0000000000000000   000000007dbf9620
> ffffffffffffffff   0000000000000000   0000000000000009   000000007e45b010
>
>     CR / XER           LR / CTR          SRR0 / SRR1        DAR / DSISR
>         80000402   000000007dbe2190   000000007dbe131c   ffffffffffffffff
> 0000000020000000   000000007dbe0d34   8000000000001000           40000000

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https://bugs.launchpad.net/bugs/1734856

Title:
  Can't boot VM with more than 16 disks (slof buffer issue)

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