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From: Andi Kleen <ak@suse.de>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [PATCH] sysctl: Allow /proc/sys without sys_sysctl
Date: Wed, 12 Jul 2006 16:52:21 +0200
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> So it will correctly handle that sysctl being compiled out, and
> the fallback to using /proc.  The code seems to have been
> doing that since it was added to glibc in 2000.

Using /proc is extremly slow for this. You added significant 
cost to each program startup.

I still think it's a good idea to simulate that sysctl and printk
the others.
 
-Andi