采用最近久未使用算法，实现分页管理的缺页调度，每当程序所要访问的页面未在内存是，变向CPU发出一缺页中断。如果内存已经满，则需按照置换算法从内存中选出一页准备换出。-Recently, the use of using long algorithm missing pages paging management scheduling, whenever the procedure did not want to access the page in memory is that the change to the CPU to issue a page fault. If the memory is full, then in accordance with the replacement algorithm to select from memory a ready-for-out.