Decermenter overflow interrupt atfer the init.d launch.
Benjamin Herrenschmidt
benh at kernel.crashing.org
Fri Jul 27 17:26:20 EST 2007
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.
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