printf("Normal read on fd %d\n", pollfd[i].fd);
/* it's ok to have an unavailable subbuffer */
ret = read_subbuffer(&fd_pairs->pair[i]);
printf("Normal read on fd %d\n", pollfd[i].fd);
/* it's ok to have an unavailable subbuffer */
ret = read_subbuffer(&fd_pairs->pair[i]);