MAX_INFLIGHTS
r = io_setup(MAX_INFLIGHTS, &aio->aio_ctx);
struct io_event events[MAX_INFLIGHTS];
cb = &(aio->cbt[0 % MAX_INFLIGHTS]);
r = io_getevents(aio->aio_ctx, 1, MAX_INFLIGHTS,
struct io_event events[MAX_INFLIGHTS];
struct iocb cbt[MAX_INFLIGHTS];