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Date:      Fri, 14 Mar 2003 16:07:02 -0600 (CST)
From:      Mike Silbersack <silby@silby.com>
To:        Garance A Drosihn <drosih@rpi.edu>
Cc:        Poul-Henning Kamp <phk@phk.freebsd.dk>, "Daniel C. Sobral" <dcs@tcoip.com.br>, Juli Mallett <jmallett@FreeBSD.org>, Eivind Eklund <eivind@FreeBSD.org>, David Schultz <das@FreeBSD.org>, src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/sys/vm ... SIGDANGER
Message-ID:  <20030314160313.O4480@odysseus.silby.com>
In-Reply-To: <p05200f2eba97fc3b6b96@[128.113.24.47]>
References:  <8023.1047662161@critter.freebsd.dk>    <p05200f2bba97e5a92150@[128.113.24.47]> <20030314140414.V4480@odysseus.silby.com>    <p05200f2cba97ef395f0e@[128.113.24.47]> <20030314152510.A4480@odysseus.silby.com> <p05200f2eba97fc3b6b96@[128.113.24.47]>

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On Fri, 14 Mar 2003, Garance A Drosihn wrote:

> Almost all of the suggestions that have come forward are good
> ideas to do *in addition* to SIGDANGER, but SIGDANGER provides
> a program with a way to SPECIFICALLY address this very SPECIFIC
> issue, without having to care what UID it got, or what nice

The problem with SIGDANGER is that only two programs will use it:

1.  lpd at RPI.

2.  The forkbomb someone will post to bugtraq the day after we add the
feature.

I fully agree that there needs to be a way to prioritize processes.
However, adding an extra signal is just not the way to do it.  If we want
a manual system like that, let's just add a "don't kill" bit to the proc
structure which can be set through nice or some other utility by the
system administrator.

Mike "Silby" Silbersack

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