Kernel Korner - Using RCU in the Linux 2.5 Kernel
RCU will become more important as CPU architecture continues to evolve. Nonetheless, other primitives always will be needed. It is quite likely that Rusty Russell's implementation of RCU (the call_rcu() and synchronize_kernel() primitives themselves) can be modified to be entirely free of locks, memory barriers and atomic instructions. This implementation might run faster than the current 2.5 kernel implementation.
Numerous people are looking at new uses of RCU in the VFS layer, VM code, filesystems and networking code. I look forward to continuing to learn about RCU and its uses and am grateful to the many people who have tried it out.
Paul E. McKenney has worked on SMP and NUMA algorithms for longer than he cares to admit. Prior to that, he worked on packet-radio and Internet protocols (but long before the Internet became popular). His hobbies include running and the usual house-wife-and-kids habit. This work represents the view of the author and does not necessarily represent the view of IBM.
Special Reports: DevOps
Have projects in development that need help? Have a great development operation in place that can ALWAYS be better? Regardless of where you are in your DevOps process, Linux Journal can help!
With deep focus on Collaborative Development, Continuous Testing and Release & Deployment, we offer here the DEFINITIVE DevOps for Dummies, a mobile Application Development Primer, advice & help from the experts, plus a host of other books, videos, podcasts and more. All free with a quick, one-time registration. Start browsing now...
- The Ubuntu Conspiracy
- A First Look at IBM's New Linux Servers
- Vigilante Malware
- Disney's Linux Light Bulbs (Not a "Luxo Jr." Reboot)
- Vagrant Simplified
- Libreboot on an X60, Part I: the Setup
- System Status as SMS Text Messages
- Dealing with Boundary Issues
- Bluetooth Hacks
- Non-Linux FOSS: Code Your Way To Victory!