* Kei IKEDA (s2280...@st.go.tuat.ac.jp) wrote: > Hi! > > I am experimenting with post-copy by modifying qemu-6.0.0 in my research. > I transfer a VM between two machines but it fails most of the time with > these error messages. > > ``` > qemu-system-x86_64: postcopy_ram_listen_thread: loadvm failed: -5 > > > qemu-system-x86_64: error while loading state for instance 0x0 of device > 'kvm-tpr-opt' > > qemu-system-x86_64: load of migration failed: Operation not permitted > ``` > > I checked that it does not happen in vanilla qemu-6.0.0 post-copy migration > so my modifying causes this error. > > I want to fix this error but I don't know what these error messages mean. > > If anyone knows what the situation is with this error, please let me know.
My guess from that error is that the vapic_post_load function in hw/i386/kvmvacpic.c is erroring - or something around that; it tells you it's the 'kvm-tpr-opt' device that's failing to load, so you need to find out why. Are your changes anything to do with apic? Dave > Thanks. > > ---Experiment information--- > machine > HPE ProLiant DL360 Gen10 > OS > Linux 5.11.22 with Ubuntu 22.04.1 LTS > Startup command > source side > ``` > sudo /home/work/qemu-6.0.0/build/x86_64-softmmu/qemu-system-x86_64 -cpu > host -smp 8 -m 16G -enable-kvm -drive > if=virtio,file=/var/nfs/migrate/64G.qcow2,cache=none -monitor stdio -qmp > tcp:localhost:4445,server,nowait -net nic -netdev > bridge,helper=/usr/lib/qemu/qemu-bridge-helper,id=hn0 -device > virtio-net-pci,netdev=hn0,id=br0,mac=00:16:3e:33:ad:7d -net > user,smb=/var/nfs/migrate,hostfwd=tcp::5557-:22,hostfwd=tcp::8000-:11211 > ``` > destination side > ``` > sudo /home/kei/work/qeme-6.0.0/build/x86_64-softmmu/qemu-system-x86_64 > -cpu host -smp 8 -m 16G -enable-kvm -drive > if=virtio,file=/var/nfs/migrate/64G.qcow2,cache=none -monitor stdio > -incoming tcp:0:4444 -qmp tcp:0:4446,server,nowait -net nic -netdev > bridge,helper=/usr/lib/qemu/qemu-bridge-helper,id=hn0 -device > virtio-net-pci,netdev=hn0,id=br0,mac=00:16:3e:33:ad:7d -net > user,smb=/var/nfs/migrate,hostfwd=tcp::5557-:22,hostfwd=tcp::8000-:11211 > ``` > --------------------------------------- -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
