A slightly outdated description on Linux/RK can be obtained by clicking here. Please refer to the articles on Resource Kernel and Portable Resource Kernel to gain a better understanding of Linux/RK. You may also want to look at other work related to this effort.
Linux/RK is developed by the Real-time
and Multimedia Systems Laboratory led by Dr.
Raj Rajkumar at Carnegie Mellon University.
This version was built by Dr. Shui
Oikawa and builds on earlier work done by the Real-time and Multimedia
arch/i386/Makefile Do not check vmlinux for zlilo (takes too long to install)
arch/i386/kernel/entry.S Add hooks when leaving
from the kernel
Add system call entries (201 - 205)
arch/i386/kernel/irq.h Add hooks when entering the kernel
drivers/char/serial.c Make the speed of serial console 38400bps from 9600bps
Add the pointer to a resource set in task structure
Modify INIT_TASK to initialize that pointer
include/asm-i386/unistd.h Add system call entry numbers (201 - 205)
init/main.c Add rk_init()
Add schedule hook
APM should not be include in the configuration since the variable CPU speeds of APM is not compatible with the scheme Linux/RK uses to keep track of processes' CPU utilization. Linux/RK uses CPU cycles to know how much CPU time is used by a process, and Linux/RK does not follow the changes of CPU speeds caused by APM (yet?).2. Incomplete implementation
The implementation of the admission control and portable scheduling architecture mentioned in the Linux/RK paper has not yet been completed.