lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
lum->attr.subbuf_size = default_get_metadata_subbuf_size();
lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
lum->attr.subbuf_size = default_get_metadata_subbuf_size();
lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;