virt-manager upstream now supports libvirt managed save APIs:
Should be a trivial backport, and AIUI this is desired functionality for RHEL6 GA (but I'll let hewbrocca argue that).
For testing: There is now an extra option under the various VM shutdown menus: 'Save'. This is basically an 'offline pause': the VM is stopped, but it's current memory state is saved by libvirt. When a save successfully completes, all the UI previously labeld 'Run' will now be called 'Restore'. Running 'Restore' should start the VM right where you last saved.
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release. Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release. This request is not yet committed for
Created attachment 413867 [details]
Managed save backport
Managed save is a major usability enhancement that is brand-new for RHEL 6. Current virt-manager doesn't support it at all so there is little risk of regression in adding the new feature.
Verified PASSED with virt-manager-0.8.4-6.el6.
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.