Quote Originally Posted by seskanda
Yes, i want to install realtime preemption to my Knoppix Debian-based HD installation. How would i install the preempt patched kernel and have the option of choosing BOTH the original kernel and preemptive one at the grub boot loader? Although, as i posted above, i might already have a realtime preempt kernel, since 'uname -a' says PREEMPT. How can i confirm if the kernel has realtime preemption applied to it?
Your GRUB should add new kernels automatically to /boot/grub/menu.lst file. If not, you can add new kernel by editing file yourself.

Realtime preemption is not included in the vanilla kernel. If you have CONFIG_PREEMPT=y in your .config file (what you see with 'uname -a'), that don't mean you have realtime preempt kernel. There's many changes in configuration if using -rt patch e.g. CONFIG_PREEMPT_RT=y which option you don't even have in vanilla kernel. But anyhow, CONFIG_PREEMPT=y is better than CONFIG_PREEMPT_VOLUNTARY=y in kernel configuration.


-tapsa-