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[Xen-devel] Memory oversubscription

Hi.  First of all, thanks for Xen.  It's terrific!

I'm interested in doing memory oversubscription and am wondering if Xen can do this (now or in the future).
For example, on a machine with 100MB available physical memory, can I:
1. Create a domain with a 90MB allocation
2. Inflate a balloon in that domain and return say 40MB back to Xen

I know there are mechanisms for doing 1 and 2...

3. Allocate a second domain with an allocation of 50MB?



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