change kthread priority

[loody]

Dear all:
I have some questions about kthread:
1. can we change kthread priority through user mode program?
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.

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?"

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Regards,

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Regards,



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Regards,