Yes, The problem is that the 5th option is the very interesting because is the full RT, the other are RT but partial.
I found this patch https://www.kernel.org/pub/linux/kernel/projects/rt/3.4/patch-3.4.113-rt145.patch.xz
how i can patch the kernel of armbian with this patch? I put on the folder sun8i-default but the process fail.
Thanks