Containers/UBC discussion

unified interface for mem, cpu, disk I/O

It is still not clear whether we need unified interface.

memory reclamation

Pending to be implemented on top of BC.

moving tasks across beancounters

Required changes:

1. saving bc on vma instead of mm
2. changing mm->bc in set_bc_id().

what is implied by the term "guarantee"

1. container will be able to touch that number of pages
2. container will be able to map that number of pages
3. container will not be killed unless it touches that number of pages
4. anything else