Chris Lalancette wrote:
Note that there is a FIXME in the code. When testing this out with kvm-78, I found that if I let the source side kill the source VM immediately after the "migrate" monitor command completed, the migration to the destination would never complete. This seems to be a bug in Qemu; the migrate monitor command shouldn't return until the migrate is really, truly complete. I'm posting this now so I can get reviews, and start to address review comments while I try to figure out what's going on with Qemu. With my temporary hack of the sleep() call in there, though, I was able to successfully live migrate an F-9 guest between two machines.
I reported this to upstream Qemu, and it seems that Anthony committed a fix for it. I removed the sleep and re-tested it with Anthony's fix in my copy of KVM, and it seems to have worked. I'll re-submit without the sleep (once I have a few further review comments). -- Chris Lalancette