Re: Problems installing a real time kernel.

["Ahmed S. Darwish" <a.darwish@linutronix.de>]

On Tue, Jun 07, 2022, Willett, Tony wrote:
> Hello.
>
> I am trying to work with a Franka Emika Panda Robot Arm and to do so I
> need to run a real time kernel on my Linux PC.
>
> This tutorial/walkthrough is my primary source of information-
> https://frankaemika.github.io/docs/installation_linux.html#setting-up-the-real-time-kernel
>

This is not the primary/official documentation. The primary
documentation is at:

    https://wiki.linuxfoundation.org/realtime/preempt_rt_versions

Please clone the linux-stable-rt git repo directly and switch to the
stable rt version you want, instead of manually applying the RT patch.

> Patch the kernel and set up .config file to choose Preemptable kernel (Real-Time).
> Then I compile it, it produces linux-upstream files which I did not expect.
> Making the kernel looked good and then fails with the following error-
> Initially it gives the following warnings-

Vendor patches or instructions cannot be supported here.

Please clone the repository earlier shown, switch to the stable rt
version you need (list of stable rt releases are in the aforementioned
link), mention the tag you've used, then show the exact build command
sequence you did.

Afterwards, hopefully I can provide some further help.

Good luck,

--
Ahmed S. Darwish
Linutronix GmbH