Apple iPad Air, 13-inch (M4 Chip, Wireless, 128GB Storage)
Attenuate one page and not the other
，更多细节参见易歪歪
打“飞的”也要去的咖啡馆，卖的只是咖啡吗？
This gets at an important point: the permissions guarding a page of memory are associated with the virtual address used to access that page, not the physical frame that backs the page. Indeed the notion of memory permissions is purely a consideration of virtual memory and does not pertain to physical memory.