Re: Changing Kernel thread priorities

[Johannes Bauer]

Absolutly correct!

However, if you are running the system on an embedded platform, where the _WHOLE_ system (including priorities) is preconfigured and never touched, starting a irq thread with the right prio from start is a more straightforward method than having to invoke a script that changes it using userspace chrt tool.

Regards JB
----- UrsprÃngliche Nachricht -----
Von: "Peter Zijlstra" <peterz@xxxxxxxxxxxxx>
Erhalten: 07.06.2011 00:36
An: hannes_bauer@xxxxxx

"Monica Puig-Pey" wrote:
> 
> I need to change the priority from inside the driver, when creating the 
> kernel thread.

No you don't. How does you driver know about what priority is correct
wrt all the other running RT tasks on the system?

Determining the right priority in a fixed priority scheduling system is
a system wide problem, nobody but the administrator can possibly even
begin to solve it.

There's a reason all RT irq threads are started at 50, its plain
impossible to do better.

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