[gpderetta]

RCU, despite the name, is indeed a reclamation algorithm, but not a general one. I.e. you would use RCU (or some other deferred reclamation algorithm like hazard pointers) for specific data structures when you do not have generalized garbage collection.

A generalized RCU is just a tracing GC.

[nemetroid]

The part where the article limits itself to general techniques eludes me.