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30e834dcb5
Post-copy Live Migration for vHost supported since DPDK 18.11 and QEMU 2.12. New global config option 'vhost-postcopy-support' added to control this feature. Ex.: ovs-vsctl set Open_vSwitch . other_config:vhost-postcopy-support=true Changing this value requires restarting the daemon. It's safe to enable this knob even if QEMU doesn't support post-copy LM. Feature marked as experimental and disabled by default because it may cause PMD thread hang on destination host on page fault for the time of page downloading from the source. Feature is not compatible with 'mlockall' and 'dequeue zero-copy'. Support added only for vhost-user-client. Signed-off-by: Liliia Butorina <l.butorina@partner.samsung.com> Co-authored-by: Ilya Maximets <i.maximets@samsung.com> Signed-off-by: Ilya Maximets <i.maximets@samsung.com> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>