Hello mtk Is it worth clarifying something on this page: http://man7.org/linux/man-pages/man7/aio.7.html off_t aio_offset; /* File offset */ Could clarify that off_t on a 32bit system will be a signed 32bit integer, meaning the maximum seek size is 2GB. I think this means that aio can only be used to access files up to 2GB. There isn't an off64_t version like lseek64() Regards, Jon -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html