Re: Live migration of x86-64 kvm guests broken?

Ryan Harper
2009-12-02T16:44:07Z

* Jan Kiszka <jan.kiszka@siemens.com> [2009-12-02 09:28]:
> Hi,
>
> I'm facing stalled x86-64 guests after live migration when using kvm
> (share disk images). This does not happen with x86-32 guests or when
> disabling kvm. Both qemu and qemu-kvm git heads are affected (recent
> vmstate fixes applied). Running I/O load during the migration (e.g. a
> simple "ls -R /") seems to trigger it reliably.
>
> Can anyone confirm / comment on this? Do we fail to restore some magic
> state that only long mode cares about?

Just tested upstream qemu.git (with vmstate fixes) and I could migrate
RHEL 5.3 64-bit guest with your light io load over localhost. I'll try
remote hosts next.

--
Ryan Harper
Software Engineer; Linux Technology Center
IBM Corp., Austin, Tx
ryanh@us.ibm.com