change kthread priority

[Mulyadi Santosa]

Hi...

On Sun, Jul 10, 2011 at  is 17:27, loody <miloody at gmail.com> wrote:
> Dear all:
> I have some questions about kthread:
> 1. can we change kthread priority through user mode program?

Theoritically you can, but only if the priority not fixed and/or you
have required capability to do so

> 2. I found some functions that may be helpful.
> sched_getscheduler
> sched_setscheduler
>
> When I use them in user mode, the return value of sched_setscheduler  is fail.

did you do that as root? anything blocking you doing that withing
SELinux or AppArmor policy?

> there is a thread talking about this,
> http://www.spinics.net/lists/linux-rt-users/msg06588.html
> What makes me confuse is "these 2 functions is used in user mode or
> kernel mode?"

AFAIK they are user mode libc functions...

-- 
regards,

Mulyadi Santosa
Freelance Linux trainer and consultant

blog: the-hydra.blogspot.com
training: mulyaditraining.blogspot.com