Re: linux and micro kernel

From: yoann@mandrakesoft.com
Date: Fri Jun 09 2000 - 09:02:39 EST


Petko Manolov <petkan@spct.net> writes:

> yoann@mandrakesoft.com wrote:
> >
> > "Johan Kullstam" <kullstam@ne.mediaone.net> writes:
> >
> > > Tonglu Yi <tlyi@fm365.com> writes:
> > >
> > > > linux is not micro kernel based OS, would it change to that in the
> > > > future?
> > >
> > > never say never, but the chances of this happening are slim and none.
> > >
> > > especially since linux has automatic loading and unloading of kernel
> > > modules, the advantages of microkernel are few.
> >
> > There is advantage : with microkernel, you have one kernel, which is
> > really small and run on top of the system which is there to manage
> > basic task, all the other stuff ( drivers for exemple ) are located
> > in userspace.
>
> Most cpu architectures don't have more than two levels - kernel and
> user.

I don't see this as a problem, please explain...

> AFAIK Linus don't like the idea of micro kernel and i bet it won't
> happen soon (if happens at all ;-).

agree :)))

>
> > The advantage is that there is really not many chance for the kernel
> > to crash, as it only do minimal thing.
> >
> > If a driver crash, it doesn't disturb the kernel.
>
> Moving all drivers in user level is *bad* idea.

It will clearly be slower, but please give reason for that thinking :)

-- 
		-- Yoann http://www.mandrakesoft.com/~yoann/
 It is well known that M$ product don't make a free() after a malloc(),
the unix community wish them good luck for their future developement.

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