Olej

This is a well-known PREEMPT_RT kernel patch. It does not provide hard realtime since QNX, VxWorks or Xenomai. Here are the results of comparisons of different systems presented here in this detailed publication: https://pdfs.semanticscholar.org/9eb5/1dbe38fb23034e80b8664d8281996d2a5ef6.pdf (University of Cambridge). It puts everything in its place.

The University of the Netherlands (Radboud University) provides (Raspberry Pi image for the Pi zero,1,2,3 with Xenomai 3.0.5 on Raspbian linux 4.1.y Debian 8 jessie) Xenomai hard realtime image with a Rapsbery Pi image for use in its extensive real-time Linux, Design of Embedded Systems and Robot Lab training programs. This means that this is a solvable problem. I would like to have a similar image for more preferred SoCs such as Orange Pi.

Another option would be to contact the authors of Xenomai (I have contact with them) and ask them to prepare a patch ipipe for the 4.14.y kernel. What 'y' exactly?

Yes, ipipe patches are prepared (by Xenomai) only for a limited number of kernel versions (4.1.18, 4.9.51). But is it possible, in principle, to adapt and apply a patch of another version of the kernel, without knowing its inner meaning. Patches Adeos (ipipe) is very voluminous and comprehensive, this is a challenging individual project. Does not seem to be any opportunity in the technology Armbian to assemble for an arbitrary kernel version, not only 4.14? How it is done, for example, in BuildRoot. Thanks.

I would like to build a hard realtime Linux kernel for Orange Pi SoC. Using Xenomai technologies (Installing Xenomai 3.x , Xenomai Documentation). This would be a great extension of the SoC application area. I did this for the x86 architecture. And I've already assembled the core using your Arabian technology. But building the realtime Xenomai kernel requires pre-patching from a third-party project Adeos (Adaptive Domain Environment for Operating Systems). Patch files for different architectures can be found here: Index of /downloads/ipipe/v4.x Is it possible to build a realtime kernel using Arabian? P.S. I apologize for my poor English.