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. 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 ``` ---------------------------------------
