Re: memory overcommitment

[Chris Atenasio <root@lilo.dyn.ml.org>]

> If you can suggest a good algorithm for selecting processes to kill,
> we'd love to hear about it.  The best algorithm will not be the same for
> all users.

How bout: if(no_more_ram) kill(process_using_most_ram());

Of course to be useful it would have to add together the usage of multiple
instances of a program of the same uid(and then kill all of them too!).
Furthermore you might even want to kill uid 0 progs last.  This way hopefully an
attacker mallocing way too much or starting a fork bomb would be the one that
gets shafted.  (Maybe even write an interface to pass the offending uid to a
userspace program which can then invalidate that user account, send mail, do
cool things etc.)  Then what if you(the admin)C do something evil?
Well... don't!

- Chris
--------------------------------------------------------------------------------
Chris Atenasio (chrisa@ultranet.com) -- Friends dont let friends use Windows.
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