Re: user-mode-linux for Mach?

[Samuel Thibault]

Hi,

On Wed, Dec 13, 2006 at 08:24:04PM +0200, Constantine Kousoulos wrote:
> I'm thinking that IF user-mode-linux could be ported to Mach,
Thomas Schwinge, le Wed 13 Dec 2006 19:50:21 +0100, a écrit :
> Funny :-).  Some weeks ago I also got the idea about porting user-mode
> Linux to GNU/Hurd.  (But didn't start with it yet.)

Aow sorry, I understood the converse.

> As I undestand it, user-mode Linux is a ``normal'' user-space program and
> as such it wouldn't be ported to Mach, but to our user-space environment.

Yes. And I'd say it shouldn't be too hard, since Mach also reserves
0x0-0xc0000000 for userland.

> > it MIGHT be possible to modify it in order to use some of linux's
> > drivers in user-space.
> 
> I can't approve or negate that, but I don't think that Linux's user-mode
> Linux can run (hardware) device drivers inside such an instance.

User-mode-linux is not supposed to run device drivers. Now, as you said,
some development are still possible, but it's probably not a long-term
solution.

> > Could something like this work? I know there are many serious if's 
> > involved here and it is very likely i have some major flaw in my 
> > reasoning, so please share your thoughts.
> 
> It would be worth a try.  An essential thing I saw when I browsed through
> the urls was to be able to do system call interception.  I do not (yet)
> know if that is possible in our system.

This will probably require some little modification in Mach, yes.

Samuel