Re: Freebsd Jails implementation over OpenBSD

[Artur Grabowski <art@blahonga.org>]

geraldo busato <anorexia@softhome.net> writes:

> Yes, they are probably really hard to implement from scratch but having them already introduced on FreeBSD code makes makes the task much 
> easier. I'll figure out what are the files FreeBSD had modified and take a closer look at them.

No. It doesn't make the task any easier. It makes you think it is easier and
as usual it will end up with a diff that fixes just most of the relevant
code, not all of it and the experienced kernel hacker who deicedes that
the work is worth doing will have to do all the work from scratch anyway
because the diff was only almost good. We've been there many times.

So unless you are a very experienced kernel hacker or you describe _exactly_
why and how you made the relevant changes to the kernel and how you found
the relevant places to change and why you are sure that there are no other
places that need changing, your diff will be rejected. I don't want to
discourage you, but approaching this very hard problem the wrong way
will most certainly lead to failure which will be discouraging in itself
and it will create more work for us.

//art

> --geraldo
> 08/01/02 21:54:58, Artur Grabowski <art@blahonga.org> escreveu:
> 
> >Jails are not such a bad idea, but implementing them correctly is very hard.
> >
> >It might be a good idea to work toward that goal by slowly improving kernel
> >access checking and making it finer grained, but I doubt that it can be done
> >correctly with "porting" or in "just one diff".
> >
> >//art