[Xen-devel] Question about memory management in Xen

["Haifeng He" <hehaifeng2nd@xxxxxxxxx>]

Hi, All

I have a question about the memory management in Xen. Suppose I start
2 DomU instances and both of them use the same kernel image. In this case,

1) will Xen make two copy of the kernel image in the memory, i.e., occupy
2*sizeof(kernel image) space in the physical memory or,

2) will Xen only have one copy of the read-only pages of the kernel
image (for instance, text section, rodata section) in the physical
memory? Because I read
somewhere about that, Unix will only have one copy of read-only pages in the
memory and share them among processes.  How about Xen? Any thoughts?

Thank you

Haifeng

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