Following the current discussion on the kvm ML, here are the qemu bits regarding async page faults. They are responsible for enabling, disabling the feature and adding a savevm handler for live migration.
Dominik Dingel (1): Enable async page faults with live migration target-s390x/kvm.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) -- 1.8.2.2
