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.

- k