linux-kernel - Re: [RFC] use of /sys versus /proc

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Date:	Fri, 23 May 2008 15:48:19 -0500
From:	Cliff Wickman <cpw@....com>
To:	Valdis.Kletnieks@...edu
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [RFC] use of /sys versus /proc

On Fri, May 23, 2008 at 01:19:20PM -0400, Valdis.Kletnieks@...edu wrote:
> On Fri, 23 May 2008 08:12:55 CDT, Cliff Wickman said:
> > 
> > I have a need to display TLB shootdown statistics.  (I'm working
> > on a patch to implement this on a new machine at SGI.)
> > 
> > I had planned to display these statistics through /proc
> > as in arch/ia64/sn/kernel/sn2/sn2_smp.c (/proc/sgi_sn/ptc_statistics).
> > 
> > However, considering the general move to reserve /proc for
> > process-related things, I thought the community might prefer the
> > interface to be in /sys.
> 
> Is debugfs an option?

I tried that out and it works about like /proc, which is good.
It doesn't clutter /proc.
Plus it can disappear gracefully from the kernel if CONFIG_DEBUG_FS
is set off.  (it is set on in the default x86_64 configuration)

So thanks for the suggestion.  It may be the answer.

-- 
Cliff Wickman
Silicon Graphics, Inc.
cpw@....com
(651) 683-3824
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