内核虚拟地址转换
[英]kernel virtual address translation
问题描述
Considering Linux and 32 bit x86 arch there is 3:1 divide of the accessible 4GB address space. 
考虑到Linux和32位x86 arch，可访问的4GB地址空间有3：1的分界。 The user space is allocated 0-3 Gb while 3-4 Gb is allocated to kernel. 用户空间分配0-3 Gb，而3-4 Gb分配给内核。 How does a virtual address that is greater than 3Gb and hence lies into the kernel address space is transformed to the physical address? 如何将大于3Gb且因此位于内核地址空间的虚拟地址转换为物理地址？ Does page tables would come into picture? 页面表会出现吗？
1 个解决方案
解决方案1
5 2011-01-28 17:07:02
There is some information in Mel Gorman's book Understanding the Linux Virtual Memory Manager . Mel Gorman的书“ 理解Linux虚拟内存管理器”中有一些信息。
The short answer: Yes, the kernel sets up page tables to translate physical address 0 to virtual address 3 GiB. 简短回答：是的，内核设置页表将物理地址0转换为虚拟地址3 GiB。 (Section 3.7.1). （第3.7.1节）。 This includes the physical location the kernel was loaded to (usually 1MB on x86). 这包括内核加载到的物理位置（通常在x86上为1MB）。
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.