Il 19/07/2014 01:33, Alex Bligh ha scritto: > I'm trying to migrate between a pc-1.0 machine on qemu 1.0 and a pc-1.0 > machine on qemu-2.0. This appears not to work. > > It looks to me as if at some point along the line the definition of pc-1.0 > has changed (eek). > > The machine was booted with the command line [1] below, then migrated (for > the sake of ease including a full block device dump) to a file. I'm happy to > provide this (it's a blank cirros image but on a 20GB disk so quite large). > > Restoring the machine with the command line [2] (merely adding -machine > pc-1.0 which is not the default for qemu-2.0) produces the error: > Length mismatch: vga.vram: 1000000 in != 800000 > qemu: warning: error while loading state for instance 0x0 of device 'ram' > load of migration failed
This is unfortunately a known difference between qemu-kvm and qemu. > This can be fixed using command line [3] (adding an additional -global > cirrus-vga.vgamem_mb=10) in which case it gets a little further. > Length mismatch: 0000:00:03.0/virtio-net-pci.rom: 10000 in != 20000 > qemu: warning: error while loading state for instance 0x0 of device 'ram' > load of migration failed Looks like your source and destination machines have different iPXE ROMs. This could be a packaging problem in your distro. Paolo
