From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steven Rostedt <rostedt@goodmis.org>
Subject: Re: Changing real time priority of interrupt handler thread
Date: Thu, 06 May 2010 13:54:47 -0400
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Cc: Raphael Hertzog <raphael@ouaza.com>, linux-rt-users@vger.kernel.org
To: Nivedita Singhvi <niv@us.ibm.com>
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On Wed, 2010-05-05 at 11:37 -0700, Nivedita Singhvi wrote:
> Raphael Hertzog wrote:
> 
> > In case it was not clear, I want to run the IRQ handler of the serial
> > ports at a higher priority than the other ones (like network, disk,
> > etc.) to avoid buffer overruns.
> 
> Have you tried using the rtctl utility and the /etc/rtgroups file?

Also try out tuna. If you have fedora:

 yum install tuna

-- Steve