I've added a draft of a doc called "the dom0 capacity crunch" to the wiki:
The doc contains a proposal for dealing with ever-increasing dom0 load,
primarily by moving the load out of dom0 (stubdoms, helper domains etc) and,
where still necessary, tweaking the number of dom0 vcpus. I think this is
becoming pretty important and we'll need to work on this asap.
Comments are welcome.
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