lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
lum->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
lum->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;
lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
lum->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER;
lum->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER;