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[Xen-devel] Question about memory management in Xen
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] Question about memory management in Xen |
| From: | "Haifeng He" <hehaifeng2nd@xxxxxxxxx> |
| Date: | Thu, 25 Oct 2007 01:42:07 -0700 |
| Delivery-date: | Thu, 25 Oct 2007 01:42:46 -0700 |
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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 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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