[$] Multi-generational LRU: the next generation

The multi-generational LRU patch set is a significant reworking of thekernel's memory-management subsystem that promises better performance for anumber of workloads; it was covered here inApril. Since then, two new versions of that work have been released bydeveloper Yu Zhao, withversion 3being posted on May 20. Some significant changes have been made sincethe original post, so another look is in order.