On 03/27/2012 11:55 AM, Jan Kiszka wrote: > On 2012-03-27 10:55, Vasilis Liaskovitis wrote: > > Hi, > > > > is live migration between qemu-kvm stable-0.15 and stable-1.0 trees possible? > > When I live migrate a VM from 1.0 to 0.15, the destination side 0.15 qemu-kvm > > exits with: > > (qemu) Unknown savevm section or instance 'i8259' 0 > > > > That's expected, since commit "i8259:convert to qdev" 747c70af78f7088f182c87e683bdf847beead1e4 > > introduces the i8259 device in the qdev tree. > > > > The other direction (live migrate from 0.15.1 to 1.0.0) seems to work fine. > > Are any other issues expected in this direction? > > > > The vmstate for i8259 has not changed between these trees afaict. If the > > qdev-ified i8259 is reverted from stable-1.0 tree (to restore live-migration > > compatibility between the versions), would you expect problems? > > The legacy instance IDs used in old versions are not written out by > newer ones. They are just accepted on reading to allow moving forward. > There are more devices in the tree that used those instance IDs, not > only the i8259. Reverting the qdev conversion may reactivate backward > migratability for 1.0->0.15 (unless there are others as well). But that > will definitely be over after 1.1 as inrevertible code depends on the > qdev conversion. Is this true even for -M pc-0.15? -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
