From owner-freebsd-current  Sat Apr 10 12:13:42 1999
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From: Mikhail Teterin <mi@kot.ne.mediaone.net>
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Subject: Re: DoS from local users (fwd)
In-Reply-To: <Pine.BSF.4.05.9904101406400.1031-100000@janus.syracuse.net> from Brian Feldman at "Apr 10, 1999 02:07:27 pm"
To: current@freebsd.org
Date: Sat, 10 Apr 1999 15:10:52 -0400 (EDT)
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Brian Feldman once stated:

=> Once again - HOW I can limit CPU usage by *kernel* ? Also, I've just
=> tried set maxprocesses 5. And it helpless. With 5 processes limit
=> user was able to slow down P2-450 computer. Switching between windows
=> in X was VERY slow. Mouse movements was slow down too.

=> CPU states: 32.3% user,  0.0% nice, 67.2% system,  0.0% interrupt,  0.5% idle

=If you want to preempt other tasks, make that user's tasks niced!!

Which user? You don't know until it happens... And the mentioned
already baseball bat is more effective _after_ the fact. The question
is, is it possible to prevent this from happening in the first
place, without quering the Human Resources department for each
user's mental profile?..

	-mi


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