On 2015年12月30日 00:46, Michael S. Tsirkin wrote: > Interesting. So you sare saying merely ifdown/ifup is 100ms? > This does not sound reasonable. > Is there a chance you are e.g. getting IP from dhcp? > > If so that is wrong - clearly should reconfigure the old IP > back without playing with dhcp. For testing, just set up > a static IP. MAC and IP are migrated with VM to target machine and not need to reconfigure IP after migration. >From my test result, ixgbevf_down() consumes 35ms and ixgbevf_up() consumes 55ms during migration. -- Best regards Tianyu Lan -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html