[libvirt] python migrateSetMaxSpeed not taking effect

Hi, I am writing a simple python script for migrating vm's based on zfs zvol's. Either I am doing something wrong or python migrateSetMaxSpeed not taking effect: no mater what value I specify (except for 0), I end up with 10 Mib/s migration speed. The code is: def virt_migrate(domain): conn = libvirt.open('qemu:///system') domain_obj = conn.lookupByName(domain) dst='qemu+ssh://root@%s/system' % args.remote domain_obj.migrateSetMaxSpeed(40,0) new_dom = domain_obj.migrateToURI(dst,libvirt.VIR_MIGRATE_LIVE | libvirt.VIR_MIGRATE_PEER2PEER | libvirt.VIR_MIGRATE_NON_SHARED_INC | libvirt.VIR_MIGRATE_PERSIST_DEST | libvirt.VIR_MIGRATE_UNDEFINE_SOURCE, None, 0) conn.close() Also tried to specify bandwidth at migrateToUri- I still get 10 mib/s at any value... Thanks in advance!