What's the best linux kernel locking mechanism for a specific scenario

Question

I need to solve a locking problem for this scenario:

1. A multi CPU system.
2. All of the CPU\'s use a common (software) resource.
3. Read only access to

Answer 1

Isn't this the sort of usage case RCU is designed to handle? See http://lwn.net/Articles/262464/ for a good write up on it's use.