Date: Thu, 31 Jul 2003 19:11:55 -0400
From: Joe Korty <joe.korty@ccur.com>
To: Andrew Morton <akpm@osdl.org>
Cc: torvalds@osdl.org, linux-kernel@vger.kernel.org, rml@tech9.net
Subject: Re: [PATCH] protect migration/%d etc from sched_setaffinity
Message-ID: <20030731231154.GB7852@rudolph.ccur.com>
Reply-To: Joe Korty <joe.korty@ccur.com>
References: <20030731224604.GA24887@tsunami.ccur.com> <20030731154740.4e21a6e2.akpm@osdl.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20030731154740.4e21a6e2.akpm@osdl.org>
User-Agent: Mutt/1.4i
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 962
Lines: 23

> Joe Korty <joe.korty@ccur.com> wrote:
> >
> > Lock out users from changing the cpu affinity of those per-cpu system
> > daemons which cannot survive such a change, such as migration/%d.
> 
> Generally we prefer to not add code which purely protects root from making
> mistakes.  Once the sysadmin has nuked his box he'll learn to not do it
> again.

I'd like to be able to write shell scrips that operate on the set of
/proc/[0-9]* without having to know which of the ever-changing list
of processes need to be avoided and which not.

And it's not really root.  It's a SYS_CAP_NICE capability.  All
realtime apps or their admins will have that capability as a matter
of course in their normal daily operations.

Joe
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/