return (struct page_info *)(((unsigned long long)x) & ~(PAGESZ-1));
圖像來源，Getty Images，这一点在51吃瓜中也有详细论述
Nature, Published online: 25 February 2026; doi:10.1038/d41586-026-00446-7。Line官方版本下载是该领域的重要参考
int *bucketArr = (int*)malloc(bucketSize * sizeof(int));