Subject: Re: Decermenter overflow interrupt atfer the init.d launch.

From: Benjamin Herrenschmidt <[email-masked]>
Date: Fri, 27 Jul 2007 17:26:20 +1000

On Fri, 2007-07-27 at 01:46 -0500, Kumar Gala wrote:
> On Jul 27, 2007, at 1:36 AM, Nicolas Mederle wrote:
> 
> > Hi,
> >
> >        I want to know how the kernel switch the task. Because my  
> > kernel
> > start very well, and it launch  the init.d. With the log, i can see  
> > that
> > the kernel launch the getty task. But after, there is a decrementer
> > overflow interrupt  ( vector at adress 900 ). Is it the task  
> > switch? Or
> > is it an error in the decrementer init.
> 
> This should be a task switch.  The decrementer is used to handle the  
> periodic interrupt to switch processes.

I would have expected quite of few of these actually before you get
there :-)

Ben.