[libvirt] [PATCH]: Implement Qemu/KVM live migration

Chris Lalancette clalance at redhat.com
Thu Nov 6 15:53:05 UTC 2008

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

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