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chapter.10: question
Signed-off-by: Yixun Lan <dlan@gentoo.org>
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chapters/chapter.10.txt

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0) page 178, (3) 一级页表的页表项存放二级页表的物理地址,如何理解“物理地址”,为什么不是虚拟地址?
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1) page 197, early_pgtable_alloc()
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a) 如果在mmu使能之后还能使用这个函数分配页表吗
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b) 这个函数里执行了清零操作, 如果不调用memset(),需要怎么操作?把哪些位清零?

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