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+user-level: 0.699
+KVM: 0.691
+mistranslation: 0.659
+hypervisor: 0.656
+peripherals: 0.646
+TCG: 0.642
+ppc: 0.642
+x86: 0.637
+i386: 0.633
+virtual: 0.629
+vnc: 0.625
+risc-v: 0.621
+VMM: 0.621
+debug: 0.620
+kernel: 0.620
+PID: 0.614
+permissions: 0.613
+register: 0.609
+graphic: 0.603
+assembly: 0.602
+device: 0.601
+semantic: 0.600
+arm: 0.598
+boot: 0.598
+socket: 0.596
+architecture: 0.594
+performance: 0.594
+files: 0.592
+network: 0.491
+
+[Qemu-devel][bug] qemu crash when migrate vm and vm's disks
+
+When migrate vm and vm’s disks target host qemu crash due to an invalid free.
+#0  object_unref (obj=0x1000) at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/qom/object.c:920
+#1  0x0000560434d79e79 in memory_region_unref (mr=<optimized out>)
+at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/memory.c:1730
+#2  flatview_destroy (view=0x560439653880) at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/memory.c:292
+#3  0x000056043514dfbe in call_rcu_thread (opaque=<optimized out>)
+at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/util/rcu.c:284
+#4  0x00007fbc2b36fe25 in start_thread () from /lib64/libpthread.so.0
+#5  0x00007fbc2b099bad in clone () from /lib64/libc.so.6
+test base qemu-2.12.0
+,
+but use lastest qemu(v6.0.0-rc2) also reproduce.
+As follow patch can resolve this problem:
+https://lists.gnu.org/archive/html/qemu-devel/2018-07/msg02272.html
+Steps to reproduce:
+(1) Create VM (virsh define)
+(2) Add 64 virtio scsi disks
+(3) migrate vm and vm’disks
+-------------------------------------------------------------------------------------------------------------------------------------
+本邮件及其附件含有新华三集团的保密信息,仅限于发送给上面地址中列出
+的个人或群组。禁止任何其他人以任何形式使用(包括但不限于全部或部分地泄露、复制、
+或散发)本邮件中的信息。如果您错收了本邮件,请您立即电话或邮件通知发件人并删除本
+邮件!
+This e-mail and its attachments contain confidential information from New H3C, which is
+intended only for the person or entity whose address is listed above. Any use of the
+information contained herein in any way (including, but not limited to, total or partial
+disclosure, reproduction, or dissemination) by persons other than the intended
+recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender
+by phone or email immediately and delete it!
+
+* Yuchen (yu.chen@h3c.com) wrote:
+>
+When migrate vm and vm’s disks target host qemu crash due to an invalid free.
+>
+>
+#0  object_unref (obj=0x1000) at
+>
+/qemu-2.12/rpmbuild/BUILD/qemu-2.12/qom/object.c:920
+>
+#1  0x0000560434d79e79 in memory_region_unref (mr=<optimized out>)
+>
+at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/memory.c:1730
+>
+#2  flatview_destroy (view=0x560439653880) at
+>
+/qemu-2.12/rpmbuild/BUILD/qemu-2.12/memory.c:292
+>
+#3  0x000056043514dfbe in call_rcu_thread (opaque=<optimized out>)
+>
+at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/util/rcu.c:284
+>
+#4  0x00007fbc2b36fe25 in start_thread () from /lib64/libpthread.so.0
+>
+#5  0x00007fbc2b099bad in clone () from /lib64/libc.so.6
+>
+>
+test base qemu-2.12.0,but use lastest qemu(v6.0.0-rc2) also reproduce.
+Interesting.
+
+>
+As follow patch can resolve this problem:
+>
+https://lists.gnu.org/archive/html/qemu-devel/2018-07/msg02272.html
+That's a pci/rcu change; ccing Paolo and Micahel.
+
+>
+Steps to reproduce:
+>
+(1) Create VM (virsh define)
+>
+(2) Add 64 virtio scsi disks
+Is that hot adding the disks later, or are they included in the VM at
+creation?
+Can you provide a libvirt XML example?
+
+>
+(3) migrate vm and vm’disks
+What do you mean by 'and vm disks' - are you doing a block migration?
+
+Dave
+
+>
+-------------------------------------------------------------------------------------------------------------------------------------
+>
+本邮件及其附件含有新华三集团的保密信息,仅限于发送给上面地址中列出
+>
+的个人或群组。禁止任何其他人以任何形式使用(包括但不限于全部或部分地泄露、复制、
+>
+或散发)本邮件中的信息。如果您错收了本邮件,请您立即电话或邮件通知发件人并删除本
+>
+邮件!
+>
+This e-mail and its attachments contain confidential information from New
+>
+H3C, which is
+>
+intended only for the person or entity whose address is listed above. Any use
+>
+of the
+>
+information contained herein in any way (including, but not limited to, total
+>
+or partial
+>
+disclosure, reproduction, or dissemination) by persons other than the intended
+>
+recipient(s) is prohibited. If you receive this e-mail in error, please
+>
+notify the sender
+>
+by phone or email immediately and delete it!
+-- 
+Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
+
+>
+-----邮件原件-----
+>
+发件人: Dr. David Alan Gilbert [
+mailto:dgilbert@redhat.com
+]
+>
+发送时间: 2021年4月8日 19:27
+>
+收件人: yuchen (Cloud) <yu.chen@h3c.com>; pbonzini@redhat.com;
+>
+mst@redhat.com
+>
+抄送: qemu-devel@nongnu.org
+>
+主题: Re: [Qemu-devel][bug] qemu crash when migrate vm and vm's disks
+>
+>
+* Yuchen (yu.chen@h3c.com) wrote:
+>
+> When migrate vm and vm’s disks target host qemu crash due to an invalid
+>
+free.
+>
+>
+>
+> #0  object_unref (obj=0x1000) at
+>
+> /qemu-2.12/rpmbuild/BUILD/qemu-2.12/qom/object.c:920
+>
+> #1  0x0000560434d79e79 in memory_region_unref (mr=<optimized out>)
+>
+>     at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/memory.c:1730
+>
+> #2  flatview_destroy (view=0x560439653880) at
+>
+> /qemu-2.12/rpmbuild/BUILD/qemu-2.12/memory.c:292
+>
+> #3  0x000056043514dfbe in call_rcu_thread (opaque=<optimized out>)
+>
+>     at /qemu-2.12/rpmbuild/BUILD/qemu-2.12/util/rcu.c:284
+>
+> #4  0x00007fbc2b36fe25 in start_thread () from /lib64/libpthread.so.0
+>
+> #5  0x00007fbc2b099bad in clone () from /lib64/libc.so.6
+>
+>
+>
+> test base qemu-2.12.0,but use lastest qemu(v6.0.0-rc2) also reproduce.
+>
+>
+Interesting.
+>
+>
+> As follow patch can resolve this problem:
+>
+>
+https://lists.gnu.org/archive/html/qemu-devel/2018-07/msg02272.html
+>
+>
+That's a pci/rcu change; ccing Paolo and Micahel.
+>
+>
+> Steps to reproduce:
+>
+> (1) Create VM (virsh define)
+>
+> (2) Add 64 virtio scsi disks
+>
+>
+Is that hot adding the disks later, or are they included in the VM at
+>
+creation?
+>
+Can you provide a libvirt XML example?
+>
+Include disks in the VM at creation
+
+vm disks xml (only virtio scsi disks):
+  <devices>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native'/>
+      <source file='/vms/tempp/vm-os'/>
+      <target dev='vda' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data1'/>
+      <target dev='sda' bus='scsi'/>
+      <address type='drive' controller='2' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data2'/>
+      <target dev='sdb' bus='scsi'/>
+      <address type='drive' controller='3' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data3'/>
+      <target dev='sdc' bus='scsi'/>
+      <address type='drive' controller='4' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data4'/>
+      <target dev='sdd' bus='scsi'/>
+      <address type='drive' controller='5' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data5'/>
+      <target dev='sde' bus='scsi'/>
+      <address type='drive' controller='6' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data6'/>
+      <target dev='sdf' bus='scsi'/>
+      <address type='drive' controller='7' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data7'/>
+      <target dev='sdg' bus='scsi'/>
+      <address type='drive' controller='8' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data8'/>
+      <target dev='sdh' bus='scsi'/>
+      <address type='drive' controller='9' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data9'/>
+      <target dev='sdi' bus='scsi'/>
+      <address type='drive' controller='10' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data10'/>
+      <target dev='sdj' bus='scsi'/>
+      <address type='drive' controller='11' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data11'/>
+      <target dev='sdk' bus='scsi'/>
+      <address type='drive' controller='12' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data12'/>
+      <target dev='sdl' bus='scsi'/>
+      <address type='drive' controller='13' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data13'/>
+      <target dev='sdm' bus='scsi'/>
+      <address type='drive' controller='14' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data14'/>
+      <target dev='sdn' bus='scsi'/>
+      <address type='drive' controller='15' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data15'/>
+      <target dev='sdo' bus='scsi'/>
+      <address type='drive' controller='16' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data16'/>
+      <target dev='sdp' bus='scsi'/>
+      <address type='drive' controller='17' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data17'/>
+      <target dev='sdq' bus='scsi'/>
+      <address type='drive' controller='18' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data18'/>
+      <target dev='sdr' bus='scsi'/>
+      <address type='drive' controller='19' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data19'/>
+      <target dev='sds' bus='scsi'/>
+      <address type='drive' controller='20' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data20'/>
+      <target dev='sdt' bus='scsi'/>
+      <address type='drive' controller='21' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data21'/>
+      <target dev='sdu' bus='scsi'/>
+      <address type='drive' controller='22' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data22'/>
+      <target dev='sdv' bus='scsi'/>
+      <address type='drive' controller='23' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data23'/>
+      <target dev='sdw' bus='scsi'/>
+      <address type='drive' controller='24' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data24'/>
+      <target dev='sdx' bus='scsi'/>
+      <address type='drive' controller='25' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data25'/>
+      <target dev='sdy' bus='scsi'/>
+      <address type='drive' controller='26' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data26'/>
+      <target dev='sdz' bus='scsi'/>
+      <address type='drive' controller='27' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data27'/>
+      <target dev='sdaa' bus='scsi'/>
+      <address type='drive' controller='28' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data28'/>
+      <target dev='sdab' bus='scsi'/>
+      <address type='drive' controller='29' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data29'/>
+      <target dev='sdac' bus='scsi'/>
+      <address type='drive' controller='30' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data30'/>
+      <target dev='sdad' bus='scsi'/>
+      <address type='drive' controller='31' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data31'/>
+      <target dev='sdae' bus='scsi'/>
+      <address type='drive' controller='32' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data32'/>
+      <target dev='sdaf' bus='scsi'/>
+      <address type='drive' controller='33' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data33'/>
+      <target dev='sdag' bus='scsi'/>
+      <address type='drive' controller='34' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data34'/>
+      <target dev='sdah' bus='scsi'/>
+      <address type='drive' controller='35' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data35'/>
+      <target dev='sdai' bus='scsi'/>
+      <address type='drive' controller='36' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data36'/>
+      <target dev='sdaj' bus='scsi'/>
+      <address type='drive' controller='37' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data37'/>
+      <target dev='sdak' bus='scsi'/>
+      <address type='drive' controller='38' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data38'/>
+      <target dev='sdal' bus='scsi'/>
+      <address type='drive' controller='39' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data39'/>
+      <target dev='sdam' bus='scsi'/>
+      <address type='drive' controller='40' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data40'/>
+      <target dev='sdan' bus='scsi'/>
+      <address type='drive' controller='41' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data41'/>
+      <target dev='sdao' bus='scsi'/>
+      <address type='drive' controller='42' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data42'/>
+      <target dev='sdap' bus='scsi'/>
+      <address type='drive' controller='43' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data43'/>
+      <target dev='sdaq' bus='scsi'/>
+      <address type='drive' controller='44' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data44'/>
+      <target dev='sdar' bus='scsi'/>
+      <address type='drive' controller='45' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data45'/>
+      <target dev='sdas' bus='scsi'/>
+      <address type='drive' controller='46' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data46'/>
+      <target dev='sdat' bus='scsi'/>
+      <address type='drive' controller='47' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data47'/>
+      <target dev='sdau' bus='scsi'/>
+      <address type='drive' controller='48' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data48'/>
+      <target dev='sdav' bus='scsi'/>
+      <address type='drive' controller='49' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data49'/>
+      <target dev='sdaw' bus='scsi'/>
+      <address type='drive' controller='50' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data50'/>
+      <target dev='sdax' bus='scsi'/>
+      <address type='drive' controller='51' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data51'/>
+      <target dev='sday' bus='scsi'/>
+      <address type='drive' controller='52' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data52'/>
+      <target dev='sdaz' bus='scsi'/>
+      <address type='drive' controller='53' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data53'/>
+      <target dev='sdba' bus='scsi'/>
+      <address type='drive' controller='54' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data54'/>
+      <target dev='sdbb' bus='scsi'/>
+      <address type='drive' controller='55' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data55'/>
+      <target dev='sdbc' bus='scsi'/>
+      <address type='drive' controller='56' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data56'/>
+      <target dev='sdbd' bus='scsi'/>
+      <address type='drive' controller='57' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data57'/>
+      <target dev='sdbe' bus='scsi'/>
+      <address type='drive' controller='58' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data58'/>
+      <target dev='sdbf' bus='scsi'/>
+      <address type='drive' controller='59' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data59'/>
+      <target dev='sdbg' bus='scsi'/>
+      <address type='drive' controller='60' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data60'/>
+      <target dev='sdbh' bus='scsi'/>
+      <address type='drive' controller='61' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data61'/>
+      <target dev='sdbi' bus='scsi'/>
+      <address type='drive' controller='62' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data62'/>
+      <target dev='sdbj' bus='scsi'/>
+      <address type='drive' controller='63' bus='0' target='0' unit='0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data63'/>
+      <target dev='sdbk' bus='scsi'/>
+      <address type='drive' controller='64' bus='0' target='0' unit='0'/>
+    </disk>
+    <controller type='scsi' index='0'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x02' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='1' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='2' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x01' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='3' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x03' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='4' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x04' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='5' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x05' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='6' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x06' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='7' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x07' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='8' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x08' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='9' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x09' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='10' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0a' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='11' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0b' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='12' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0c' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='13' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0d' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='14' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0e' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='15' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0f' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='16' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x10' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='17' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x11' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='18' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x12' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='19' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x13' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='20' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x14' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='21' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x15' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='22' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x16' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='23' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x17' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='24' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x18' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='25' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x19' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='26' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1a' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='27' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1b' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='28' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1c' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='29' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1d' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='30' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1e' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='31' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x01' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='32' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x02' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='33' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x03' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='34' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x04' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='35' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x05' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='36' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x06' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='37' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x07' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='38' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x08' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='39' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x09' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='40' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x0a' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='41' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x0b' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='42' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x0c' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='43' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x0d' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='44' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='45' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='46' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='47' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='48' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0d' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='49' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0e' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='50' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0f' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='51' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x10' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='52' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x11' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='53' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x12' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='54' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x13' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='55' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x14' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='56' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x15' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='57' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x16' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='58' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x17' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='59' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x18' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='60' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x19' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='61' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1a' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='62' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1b' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='63' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1c' 
+function='0x0'/>
+    </controller>
+    <controller type='scsi' index='64' model='virtio-scsi'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' 
+function='0x0'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'/>
+    <controller type='pci' index='1' model='pci-bridge'>
+      <model name='pci-bridge'/>
+      <target chassisNr='1'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' 
+function='0x0'/>
+    </controller>
+    <controller type='pci' index='2' model='pci-bridge'>
+      <model name='pci-bridge'/>
+      <target chassisNr='2'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1f' 
+function='0x0'/>
+    </controller>
+  </devices>
+
+vm disks xml (only virtio disks):
+  <devices>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native'/>
+      <source file='/vms/tempp/vm-os'/>
+      <target dev='vda' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x08' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data2'/>
+      <target dev='vdb' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x06' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data3'/>
+      <target dev='vdc' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x09' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data4'/>
+      <target dev='vdd' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data5'/>
+      <target dev='vde' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data6'/>
+      <target dev='vdf' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0d' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data7'/>
+      <target dev='vdg' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0e' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data8'/>
+      <target dev='vdh' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x0f' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data9'/>
+      <target dev='vdi' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x10' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data10'/>
+      <target dev='vdj' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x11' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data11'/>
+      <target dev='vdk' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x12' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data12'/>
+      <target dev='vdl' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x13' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data13'/>
+      <target dev='vdm' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x14' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data14'/>
+      <target dev='vdn' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x15' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data15'/>
+      <target dev='vdo' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x16' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data16'/>
+      <target dev='vdp' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x17' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data17'/>
+      <target dev='vdq' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x18' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data18'/>
+      <target dev='vdr' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x19' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data19'/>
+      <target dev='vds' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1a' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data20'/>
+      <target dev='vdt' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1b' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data21'/>
+      <target dev='vdu' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1c' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data22'/>
+      <target dev='vdv' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1d' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data23'/>
+      <target dev='vdw' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1e' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data24'/>
+      <target dev='vdx' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x01' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data25'/>
+      <target dev='vdy' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x03' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data26'/>
+      <target dev='vdz' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x04' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data27'/>
+      <target dev='vdaa' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x05' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data28'/>
+      <target dev='vdab' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x06' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data29'/>
+      <target dev='vdac' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x07' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data30'/>
+      <target dev='vdad' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x08' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data31'/>
+      <target dev='vdae' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x09' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data32'/>
+      <target dev='vdaf' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0a' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data33'/>
+      <target dev='vdag' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0b' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data34'/>
+      <target dev='vdah' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0c' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data35'/>
+      <target dev='vdai' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0d' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data36'/>
+      <target dev='vdaj' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0e' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data37'/>
+      <target dev='vdak' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x0f' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data38'/>
+      <target dev='vdal' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x10' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data39'/>
+      <target dev='vdam' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x11' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data40'/>
+      <target dev='vdan' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x12' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data41'/>
+      <target dev='vdao' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x13' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data42'/>
+      <target dev='vdap' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x14' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data43'/>
+      <target dev='vdaq' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x15' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data44'/>
+      <target dev='vdar' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x16' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data45'/>
+      <target dev='vdas' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x17' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data46'/>
+      <target dev='vdat' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x18' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data47'/>
+      <target dev='vdau' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x19' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data48'/>
+      <target dev='vdav' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1a' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data49'/>
+      <target dev='vdaw' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1b' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data50'/>
+      <target dev='vdax' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1c' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data51'/>
+      <target dev='vday' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1d' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data52'/>
+      <target dev='vdaz' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1e' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data53'/>
+      <target dev='vdba' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x01' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data54'/>
+      <target dev='vdbb' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x02' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data55'/>
+      <target dev='vdbc' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x03' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data56'/>
+      <target dev='vdbd' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x04' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data57'/>
+      <target dev='vdbe' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x05' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data58'/>
+      <target dev='vdbf' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x06' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data59'/>
+      <target dev='vdbg' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x07' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data60'/>
+      <target dev='vdbh' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x08' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data61'/>
+      <target dev='vdbi' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x09' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data62'/>
+      <target dev='vdbj' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x0a' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data63'/>
+      <target dev='vdbk' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x02' slot='0x0b' 
+function='0x0'/>
+    </disk>
+    <disk type='file' device='disk'>
+      <driver name='qemu' type='qcow2' cache='directsync' io='native' 
+discard='unmap'/>
+      <source file='/vms/tempp/vm-data1'/>
+      <target dev='vdbl' bus='virtio'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' 
+function='0x0'/>
+    </disk>
+    <controller type='pci' index='0' model='pci-root'/>
+    <controller type='pci' index='1' model='pci-bridge'>
+      <model name='pci-bridge'/>
+      <target chassisNr='1'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' 
+function='0x0'/>
+    </controller>
+    <controller type='pci' index='2' model='pci-bridge'>
+      <model name='pci-bridge'/>
+      <target chassisNr='2'/>
+      <address type='pci' domain='0x0000' bus='0x01' slot='0x1f' 
+function='0x0'/>
+    </controller>
+  </devices>
+
+>
+> (3) migrate vm and vm’disks
+>
+>
+What do you mean by 'and vm disks' - are you doing a block migration?
+>
+Yes, block migration.
+In fact, only migration domain also reproduced.
+
+>
+Dave
+>
+>
+> ----------------------------------------------------------------------
+>
+> ---------------------------------------------------------------
+>
+Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
+-------------------------------------------------------------------------------------------------------------------------------------
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