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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.
This bug seems to have same cause with Bug 1172643 which was closed as WON'T FIX
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.
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.