chan->attr.subbuf_size = DEFAULT_UST_CHANNEL_SUBBUF_SIZE;
chan->attr.num_subbuf = DEFAULT_UST_CHANNEL_SUBBUF_NUM;
chan->attr.output = DEFAULT_UST_CHANNEL_OUTPUT;
chan->attr.subbuf_size = DEFAULT_UST_CHANNEL_SUBBUF_SIZE;
chan->attr.num_subbuf = DEFAULT_UST_CHANNEL_SUBBUF_NUM;
chan->attr.output = DEFAULT_UST_CHANNEL_OUTPUT;