Re: process 0

[george anzinger]

"Richard B. Johnson" wrote:
> 
> On Fri, 23 Aug 2002 [e-mail] wrote:
> 
> > Hi.
> > Maybe this is a little off topic, but does what is the real status of
> > Process 0 (swapper) ?
> > Some people keep telling me it doesn't exist, but on some kernel crashes
> > I can see "process swapper (pid 0, process nr 0, ...)"
> >
> > Can someone help me ?
> 
> Well, it kind-of exists. It's what the CPU does when there is nothing
> else to do. Sort of like:
> 
>                 for(;;)
>                     schedule();
> 
> It's also where it 'goes' if init returns <grin>.

ALSO, FWIW on a N way SMP there will be N process 0s.  So
much for unique pids :)

-- 
George Anzinger   [e-mail]
High-res-timers: 
http://sourceforge.net/projects/high-res-timers/
Preemption patch:
http://www.kernel.org/pub/linux/kernel/people/rml