int tries;
	int err;
	struct timespec ts;

	for (tries = 0; tries < 20; tries++) {
		err = pthread_create(thread, attr, pfn, arg);
		if (err == 0) {
			pthread_detach(*thread);
			return 0;
		}
		if (err != EAGAIN) {
			return err;
		}
		ts.tv_sec = 0;
		ts.tv_nsec = (tries + 1) * 1000 * 1000; // Milliseconds.
		nanosleep(&ts, nil);
	}
	return EAGAIN;