To: linux-kernel@vger.kernel.org
From: hpa@zytor.com (H. Peter Anvin)
Subject: Re: where to export system tuneables, /proc/sys/kernel or /sys/?
Date: Tue, 8 Feb 2005 22:44:25 +0000 (UTC)
Organization: Mostly alphabetical, except Q, which We do not fancy
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References: <4207A395.1060901@nortel.com>
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Followup to:  <4207A395.1060901@nortel.com>
By author:    Chris Friesen <cfriesen@nortel.com>
In newsgroup: linux.dev.kernel
>
> I'm doing some kernel work that will export tuneables to userspace.  In 
> 2.4 I would have used /proc/sys/kernel, but now there is /sys, which was 
> supposed to be for system information.
> 
> However, a bit of poking around in /sys didn't reveal any obvious place 
> to put it.  Is current practice to still put this sort of thing in /proc?
> 

/proc/sys/kernel, using the sysctl internals, yes.

Note that the use of the sysctl(2) system call is highly deprecated,
but the /proc/sys filesystem tree is not; the reason is that the
numeric API used by the former is unstable.

	-hpa
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