exec(3) loses realtime priority of the process?

[Konstantin Belousov]

On Mon, Mar 22, 2021 at 10:11:54PM -0700, Yuri wrote:
> I noticed that when realtime priority 1 is set after fork it only stays
> until the execvp call and then the process' priority changes to 'normal'.
> 
> 
> Why does execvp lose priority? Is this intended? The manpage doesn't mention
> priority.
> 
Can you provide a minimal self-contained example demonstating the issue?