linux-kernel - Re: Changing Kernel thread priorities

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Date:	Tue, 07 Jun 2011 00:36:01 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	hannes_bauer@....at
Cc:	Monica Puig-Pey <puigpeym@...can.es>,
	Rolando Martins <rolando.martins@...il.com>,
	linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	tglx <tglx@...utronix.de>
Subject: Re: Changing Kernel thread priorities

"Monica Puig-Pey" <puigpeym@...can.es> wrote:
> 
> I need to change the priority from inside the driver, when creating the 
> kernel thread.

No you don't. How does you driver know about what priority is correct
wrt all the other running RT tasks on the system?

Determining the right priority in a fixed priority scheduling system is
a system wide problem, nobody but the administrator can possibly even
begin to solve it.

There's a reason all RT irq threads are started at 50, its plain
impossible to do better.

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