Hi... > This is regarding , changing the priority of *threads created from > kernel space* say for the thread that was created in kerne space > using kernel_thread() kernel api if we have to change the priority, > > 1. other than changing the nice value of the thread using > set_user_nice() can we change the real time scheduling poilicy and > priority of the thread? IMHO you can assign real time priority (RT prio) to the kernel thread(s). But... you must also remember the consequence that it will be scheduled more often (or even dominates) compared to the other processes. And that could mean a very busy system, that also could lead to system complete lockup if you do improper locking/unlocking. Perhaps, to counter this side effect, you must voluntary unschedule these threads for a moment.... > if so how we can we change them what will happen if highest priority > is given to the thread. I think by giving priority lower than 99, you will automatically give it real time prio. Also, choose between SCHED_FIFO or SCHED_RR. AFAIK, assign it to task_struct.policy (in 2.4.x, please check by yourself on 2.6.x). I hope it brings ideas for you... regards, Mulyadi -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
