RE: changing kernel thread priority created using kernel_thread()?

[Parav Pandit <paravpandit@xxxxxxxxx>]

Hi Manjunath,

As per my understanding, nice command and
set_user_nice() are for process and not for the
threads inside the process and kernel level threads.

process are created using fork() and has huge
task_struct.
While kernel_threads are created using, kernel_thread.

I couldn't figure out which structure is for kernel
threads, as architecture specific assembly code in
arch_kernel_thread() function has in it.

Regards,
Parav Pandit


--- Manjunath_Naik <Manjunath_Naik@xxxxxxxxxx> wrote:

> 
> I think the priority of the kernel thread can be
> changed using
> "set_user_nice" function. I had found this in
> following mailing list.
> 
>
http://www.ussg.iu.edu/hypermail/linux/kernel/0510.2/1027.html
> 
> 
> set_user_nice(current, -19);
> 
> Older kernels required:
> 
> task_lock(current);
> current->nice = -19;
> task_unlock(current);
> 
> The kernel thread can set this up when it is first
> started.
> 
> 
> Thanks
> Manjunath Naik
> 
> -----Original Message-----
> From: kernelnewbies-bounce@xxxxxxxxxxxx
> [mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf
> Of Parav Pandit
> Sent: Monday, June 05, 2006 1:53 AM
> To: kernelnewbies@xxxxxxxxxxxx
> Subject: changing kernel thread priority created
> using kernel_thread()?
> 
> Hi,
> 
> 1. How to change the priority of the kernel threads
> created using kernel_thread() API?
> 
> 2. What is the default priority of the threads
> created
> using kernel_thread() API?
> 
> 3. In latest 2.4 kernel and 2.6 kernel,
> do we have one-to-one mapping for user space process
> and POSIX threads to kernel_thread or we have M-to-N
> mapping?
> 
> Regards,
> Parav Pandit
> 
> 
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