Thomas Gleixner schrieb:
[ clip]

that it is calling setpriority() with the arguments

    which = 2 	   (PRIO_USER)
    who   = 0     (root)
    prio  = 0x14  (20)

And that's exactly what is causing your problem.

OK, thanks a lot!! 


I jumped back to PREEMPT_RT  after several years and wonder:

- why isn't on kernel.org a direct link to this project? There is only a reference to an outdated page of RTwiki

- why is in the "latest News" of RTwiki (from 2012 / Reporting Bugs)) mentioned: 
"As always, please search the existing bug list and consider posting the issue to the linux-rt-users <https://rt.wiki.kernel.org/index.php/Mailinglists> mailing list before opening a new defect." ?

Do we have to add: "If you do so, you must be prepared to get personal attacks from kernel developers ??
 
- why is it neccessary to scroll down 4 screens of a 27" monitor to find the released "vanilla" kernels in 3.x?
  I gave up after the second screen and used then a "testing" kernel  -> and that's at the end the root of the chaos! 

Are you sure that the current representation of the PREEMPT_RT project will convince customers or developers to use it?

Next station in my test work is Minix 3.0: true mikrokernel system, drivers in user space ...

--Armin