[seusscat]

PREEMPT_RT is still a out of tree patch for the kernel. There has been significant progress in mainlining it and for the last few years I've been hearing that its on its last legs of full mainlining.

However, I think its still a little while away from being fully mainlined. The last I remember were issues with preemption in printk calls. Adding this level of preemption support to every subsystem is extremely difficult. Though, I must say that the patched kernels function pretty well. If you need proper real-time, ditch GNU/Linux and go with a real real-time kernel like QNX, VxWorks, etc. Linux will never be true real-time and that's an acknowkedged fact

[billfruit]

Where can one see the updates about the status of the project to mainline PREEMPT_RT? Often in recent years there has been articles/reports about its imminent mainlining.