ret = lttng_enable_event(&dom, &ev, channel_name);
if (ret == 0) {
MSG("Kernel event %s created in channel %s", event_name, channel_name);
ret = lttng_enable_event(&dom, &ev, channel_name);
if (ret == 0) {
MSG("Kernel event %s created in channel %s", event_name, channel_name);