Re: UML is now self-hosting!

From: Jeff Dike (jdike@karaya.com)
Date: Mon May 06 2002 - 11:57:59 EST


pavel@suse.cz said:
> > embedding UML in things like Apache to provide a standard internal
> > development and execution environment
> This is little perverted, right?

Maybe :-)

> What is it good for?

Secure mod_perl - i.e. mod_perl in an Apache that's shared with other web sites

mod_perl in any language supported by Linux

Interactive debugging of your perl on live requests inside a live Apache

See http://user-mode-linux.sourceforge.net/slides/wvu2002/wvu2002.htm

The section that's relevant here starts at
        http://user-mode-linux.sourceforge.net/slides/wvu2002/img9.htm

There are also some wackier possibilities which I'm not sure are terribly
useful or practical, but would still be interesting to look at, such as:

Treating HTTP requests as processes, so
        # ps uax
        ...
        apache 1120 0.0 0.6 4388 1536 ? S 13:46 0:00 GET / HTTP/1.0
        ...
        # kill -9 1120
or
        # nice -20 1120

Treating HTTP requests as packets and using Netfilter to manipulate them.

                                Jeff

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