00226.mbox

From Marcus.Brinkmann@ruhr-uni-bochum.de Mon Jul 15 07:13:37 2002
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Date: Mon, 15 Jul 2002 13:13:30 +0200
From: Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de>
To: rreale@iol.it
Cc: bug-hurd@gnu.org
Subject: Re: Message passing in user-land
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On Mon, Jul 15, 2002 at 12:21:55PM +0200, rreale@iol.it wrote:
> Why we can't implement message passing entirely in user-space rather
> than in the kernel?

Imagine you remove all IPC from the kernel.  How do you send a user-space
message to another process?  You can't.

That said, there is a lot of things in GNU Mach that can be in user space.
Mach is a microkernel of the first generation.  Try to take a look at L4,
which is a modern microkernel that is extremely minimal.

Thanks,
Marcus

-- 
`Rhubarb is no Egyptian god.' GNU      http://www.gnu.org    marcus@gnu.org
Marcus Brinkmann              The Hurd http://www.gnu.org/software/hurd/
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de/