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Description of problem:
guest with pci-bridge setting shutdown on the target host after migration when migration from rhel7.3 to rhel7.0.
Source:
libvirt-2.0.0-6.el7.x86_64
qemu-kvm-rhev-2.6.0-22.el7.x86_64
target:
libvirt-1.1.1-29.el7_0.7.x86_64
qemu-kvm-rhev-1.5.3-60.el7_0.10.x86_64
How reproducible:
100%
Version-Release number of selected component (if applicable):
Source:
libvirt-2.0.0-6.el7.x86_64
qemu-kvm-rhev-2.6.0-22.el7.x86_64
target:
libvirt-1.1.1-29.el7_0.7.x86_64
qemu-kvm-rhev-1.5.3-60.el7_0.10.x86_64
How reproducible:
100%
Steps to reproduce:
1.Start a guest with pci-bridge setting:
#virsh dumpxml mig1
...
<controller type='pci' index='1' model='pci-bridge'>
<model name='pci-bridge'/>
<target chassisNr='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/>
</controller>
...
2.Do migration:
#virsh migrate mig1 qemu+ssh://10.66.144.29/system --live --verbose
Migration: [100 %]
4.Check the guest status on the target host:
#virsh list | grep mig1
no output
5.Check the qemu log on the target host:
...
Unknown savevm section or instance 'PCIBUS' 1
load of migration failed
2016-08-26 09:15:54.412+0000: shutting down
...
Actual results:
Migration failed
Expected results:
Migration complete correctly.
Good catch!
From Bug 1172643, it sounds like the problem is in qemu-kvm-rhev 7.0, so that's where any fix would have to be, and since pci-bridge was only tech-preview then, it's unlikely any customer would encounter it in production.
I'm Cc'ing Dave Gilbert just in case his opinion has changed in the last year and a half.
Comment 4Dr. David Alan Gilbert
2016-09-05 10:18:35 UTC
Yes that probably is the same as 1172643 - 7.0 had a problem with multiple PCI busses, and since bridges were tech-preview then it's a wontfix.
Description of problem: guest with pci-bridge setting shutdown on the target host after migration when migration from rhel7.3 to rhel7.0. Source: libvirt-2.0.0-6.el7.x86_64 qemu-kvm-rhev-2.6.0-22.el7.x86_64 target: libvirt-1.1.1-29.el7_0.7.x86_64 qemu-kvm-rhev-1.5.3-60.el7_0.10.x86_64 How reproducible: 100% Version-Release number of selected component (if applicable): Source: libvirt-2.0.0-6.el7.x86_64 qemu-kvm-rhev-2.6.0-22.el7.x86_64 target: libvirt-1.1.1-29.el7_0.7.x86_64 qemu-kvm-rhev-1.5.3-60.el7_0.10.x86_64 How reproducible: 100% Steps to reproduce: 1.Start a guest with pci-bridge setting: #virsh dumpxml mig1 ... <controller type='pci' index='1' model='pci-bridge'> <model name='pci-bridge'/> <target chassisNr='1'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x09' function='0x0'/> </controller> ... 2.Do migration: #virsh migrate mig1 qemu+ssh://10.66.144.29/system --live --verbose Migration: [100 %] 4.Check the guest status on the target host: #virsh list | grep mig1 no output 5.Check the qemu log on the target host: ... Unknown savevm section or instance 'PCIBUS' 1 load of migration failed 2016-08-26 09:15:54.412+0000: shutting down ... Actual results: Migration failed Expected results: Migration complete correctly.