Message-Id: <200503311556.j2VFu9Hc007903@laptop11.inf.utfsm.cl>
To: =?iso-8859-1?q?M=E5ns_Rullg=E5rd?= <mru@inprovide.com>
cc: linux-kernel@vger.kernel.org
Subject: Re: [RFD] 'nice' attribute for executable files 
In-Reply-To: Message from =?iso-8859-1?q?M=E5ns_Rullg=E5rd?= <mru@inprovide.com> 
   of "Wed, 30 Mar 2005 18:55:24 +0200." <yw1xpsxhvzsz.fsf@ford.inprovide.com> 
Date: Thu, 31 Mar 2005 11:56:09 -0400
From: Horst von Brand <vonbrand@inf.utfsm.cl>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1376
Lines: 29

=?iso-8859-1?q?M=E5ns_Rullg=E5rd?= <mru@inprovide.com> said:
> Wiktor <victorjan@poczta.onet.pl> writes:

[...]

> > max renice ulimit is quite good idea, but it allows to change nice of
> > *any* process user has permissions to. it could be implemented also,
> > but the idea of 'nice' file attribute is to allow *only* some process
> > be run with lower nice. what's more, that nice would be *always* the
> > same (at process startup)!

> It can be done entirely in userspace, if you want it.  Just hack your
> shell to examine some extended attribute of your choice, and adjust
> the nice value before executing files.  Then arrange to have the shell
> run with a negative nice value.  This can be easily accomplished with
> a simple wrapper, only for the shell.

Even better: Write a C wrapper for each affected program that just renices
it as needed.
-- 
Dr. Horst H. von Brand                   User #22616 counter.li.org
Departamento de Informatica                     Fono: +56 32 654431
Universidad Tecnica Federico Santa Maria              +56 32 654239
Casilla 110-V, Valparaiso, Chile                Fax:  +56 32 797513
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