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update lec 05-08

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chyyuu
2013-10-13 21:37:05 +08:00
parent 8098d09f76
commit 5a2d1a4854
4 changed files with 6 additions and 1 deletions
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7
homework/hw2.txt
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@@ -72,4 +72,9 @@ IF before clock sweep: (used,dirty) = (1,1), THEN after clock sweep: (used, dirt
IF before clock sweep: (used,dirty) = (1,1), THEN after clock sweep: (used, dirty)=(1,0).
是否可行？
6 在clock算法实现中，pte中的uesd bit位是否可以让os来设置1 or 0 ?
6 在clock算法实现中，pte中的uesd bit位是否可以让os来设置1 or 0 ? 为什么？
7 在enhanced clock算法中的dirty bit位是否可以让os来设置1 or 0 ? 为什么？
8 如果在ucore中实现精确的LRU算法，如何设计？需要硬件和OS分别完成什么事情？