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转自:http://blog.csdn.net/wzhwho/article/details/4996510 1. 原理说明 Linux内核中采用了一种同时适用于32位和64位系统的内存分页模型,对于32位系统来说,两级页表足够用了,而在x86_64系统中,用到了四级页表,如图2-1所示.四级页表分别为: l 页全局目录(Page Global Directory) l 页上级目录(Page Upper Directory) l 页中间目…
1. 原理说明 Linux内核中采用了一种同时适用于32位和64位系统的内存分页模型,对于32位系统来说,两级页表足够用了,而在x86_64系统中,用到了四级页表,如图2-1所示.四级页表分别为: l 页全局目录(Page Global Directory) l 页上级目录(Page Upper Directory) l 页中间目录(Page Middle Directory) l 页表(Page Table) 页全局目录…