Virtualization let guest run its code directive on hardware. (privilege instruction will have some issue)
Emulation let the emulator know what guest want to run and run by host.
Reference:
http://blog.tom.aratyn.name/post/34872068272/whats-the-difference-between-virtualization-and
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那kernel thread的功用又是什麼呢?
找了一些資料後自己歸納以下三點功用:
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以下是這段code看到的資訊:
address - The starting and ending address of the region in the process's address space
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其中通常切成3G:1G
0x00000000-0xbfffffff: user process(3GB)
0xc0000000-0xffffffff: kernel space (1GB)
而user process(3G)是每支user process不同的，甚至每支user thread也是不同
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Ideal computer architecture上，任意page frame都是可以被access的
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Linux kernel must deal with two hardware constraints of the 80 × 86 architecture:
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