Linux 6.12 will finally include PREEMPT_RT by default, which will give it real-time capability.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d8fccd9ca5f905533dc6c26cfd1f91beb8691c95

https://kernelnewbies.org/Linux_6.12