Hi While performing migration of a guest virtual machine from a physical node to another, it would be nice if we can figure out the free pages in the guest VM and opt not to transfer them. (Currently I have a guest VM of size 1GB and less than 300MB is occupied) 1.I came across in the paper Xen and the Art of Virtualization, that guest VM can be made to balloon out the free pages. 2.What is the way to figure out free pages in guest VM? 3.Can this be implemented in the tools (xend) code as a part of the migration framework? (I was able to note some code where ballooning is happeing.. ie while memory is being allocated to VM from hypervisor but i was not able to locate a code where VM releases memory to hypervisor. Where can I find it?) Can you please give me some pointers on this? Thank you Arun http://www4.ncsu.edu/~abnagara _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel