Re: Increase priority of a workqueue thread ?

["linux-os \(Dick Johnson\)" <linux-os@analogic.com>]

On Thu, 20 Oct 2005, Block Device wrote:

> Hi,
>    I am using a custom workqueue thread in my module. How do I increase the
> priority of the workqueue threads ?
> I've seen that each workqueue contains an array of per-cpu structures
> which has a
> task_struct of the thread on a particular cpu. Since these threads are
> created from keventd
> I think they'll have the same priority as keventd.  Also the per-cpu
> structure is something which is private to the workqueue
> implementation. Directly using it (from my driver) to increase the
> priority of the workqueue doesnt seem correct to me. Is there any
> interface or standard way of changing the priority of a workqueue.
>
> Thanks
> BD

I don't think you want to increase the priority of keventd.
You need to create a seperate kernel thread for your module's
work. That thread's priority can be set with set_user_nice()...

 	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.

Cheers,
Dick Johnson
Penguin : Linux version 2.6.13.4 on an i686 machine (5589.55 BogoMips).
Warning : 98.36% of all statistics are fiction.
.

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