Subject: Re: [RFC] [Patch 4/6] statistics infrastructure - documentation
From: Martin Peschke <mp3@de.ibm.com>
To: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: linux-kernel@vger.kernel.org, chase.venters@clientec.com,
       nickpiggin@yahoo.com.au, kaos@ocs.com.au, akpm@osdl.org,
       clameter@sgi.com, fche@redhat.com, peterc@gelato.unsw.edu.au,
       hch@infradead.org, arjan@infradead.org, ak@suse.de
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	 <20060517233343.1d5517dc.rdunlap@xenotime.net>
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Date: Thu, 18 May 2006 17:25:24 +0200
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On Wed, 2006-05-17 at 23:33 -0700, Randy.Dunlap wrote:
> On Wed, 17 May 2006 20:54:45 +0200 Martin Peschke wrote:
> 
> > documentation for developers and users
> >
[ snipped ]

Thanks reading carefully. Good catches. I fixed them all.

> > +	Why debugfs for now
> > +
> > +While sysfs comes with a refined structure reflecting almost everything
> > +in the system, it is (by design) not good at representing large and variable
> > +amounts of data, that is, more than one value per file. As for statistics,
> > +we could make good use of the former, but not of the latter.
> 
> Why is debugfs not suitable for large & variable amounts of data?
> Please expand/explain.

It might have been confusing that I started off discussing _sysfs_ (and
why it doesn't suit my needs in some regards). Debugfs is fine.

> > +	Locating statistics
> > +
> > +The statistics infrastructure's user interface is in the
> > +/sys/kernel/debug/statistics directory, assuming debugfs has been mounted at
> > +/sys/kernel/debug.  The "statistics" directory holds interface subdirectories
> > +created on the behalf of exploiters, for example:
> 
> I'm curious:
> Is /sys/kernel/debug a common mount point for debugfs ?

I would think so.

	Martin

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