Re: Premptive vs non-premptive kernel.

[Florin Malita <mali@go.ro>]

A preemtible kernel will check for need_resched in several places and if 
safe to do so will invoke preempt_schedule().

The check in not performed in a specific interrupt but rather in the 
interrupt return path, in the spinlock functions and some other places.

http://www.linuxdevices.com/articles/AT8906594941.html



amith nambiar wrote:
> --- Jan Hudec <bulb@ucw.cz> wrote:
>  
>
> > schedule() does not do the check. After all, it's
> > called rather often in
> > kernel context (explicitely). So the check must be
> > somewhere in the
> > timer interrupt stuff.
>
>
> yes, thats true it cant happen in schedule(), it
> should have happened in the timer_interupt service
> routine , it striked me later :-) !
> which is the service routine and in which file is it? 
> please let me know.
> thank you.
>
> cheers,
> Amith 
>
>
> 		
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