If we used Beancounters as Pavel and Kirill mentioned, that would
keep track of each container that has referenced a page, not just the
first container. It sounds like beancounters can return a usage count
where each page is divided by the number of referencing containers (e.g.
1/3rd if 3 containers share a page). Presumably it could also return a
full count of 1 to each container.
If we look at data in the latter form, i.e. each container must pay
fully for each page used, then Eric could use that to determine real
usage needs of the container. However we could also use the fractional
count in order to do things such as charging the container for its
actual usage. i.e. full count for setting guarantees, fractional for
actual usage.
-- Ethan
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