作者rainboat (雨舟)
看板Grad-ProbAsk
标题[理工] os一题
时间Fri May 29 20:25:41 2020
题目与答案如下，看完依然不知的是什麽意思，希望有大大能帮忙解释paged segmentation与segmented paging的差别。
Why are segmentation and paging sometimes combined into one scheme?
1.Paged segmentation handles the case of having very long segments that require a lot of time for allocation. By paging the segments, we reduce wasted memory due to external fragmentation as well as simplify the allocation.
2.Segmented paging is helpful when the page table becomes very large. A large contiguous section of the page table that is unused can be collapsed into a single-segment table entry with a page-table address of zero.
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1F：推 kyuudonut: 就是字面上的意思，如果看不懂的话建议把关键字喂狗 06/05 19:06
2F：→ kyuudonut: 都有很多材料帮忙延伸阅读。另外碎碎念一下，这种解答 06/05 19:07
3F：→ kyuudonut: 根本没有直接回答到问题。如果我是阅卷者，我会说你背 06/05 19:09
4F：→ kyuudonut: 的好，而不是觉得你真的了解问题的所在 06/05 19:10