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Is it possible to increase or decrease memory allocation to KVM guests dynamically?

Solution Unverified - Updated 2013-12-10T08:37:21+00:00 -

Issue

Does KVM support memory ballooning? Is it possible to dynamically increase/decrease memory of a KVM guest in RHEL5?
Where I could find documentation on how to use it?

Environment

Red Hat Enterprise Linux 5.5 KVM Host
Red Hat Enterprise Linux 5.5 Guest

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