Real-time OSs have some timing requirements that are ignored by most OSs. There are many commercial and open source variants of Linux We described two different approaches to supporting real-time...

Real-time OSs have some timing requirements that are ignored by most OSs. There are many commercial and open source variants of Linux We described two different approaches to supporting real-time requirements under Linux. One approach involved heavily modifying the Linux kernel process scheduling module. The other approach was conceptually cleaner and simpler. Briefly describe that approach.