linux-kernel - Re: [PATCH 1/5] debugfs - Fix mount directory of debugfs by default in events.txt

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Message-ID: <20090907213047.GA28651@kroah.com>
Date:	Mon, 7 Sep 2009 14:30:47 -0700
From:	Greg KH <greg@...ah.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	leemgs1@...il.com, linux-kernel <linux-kernel@...r.kernel.org>,
	mathieu.desnoyers@...ymtl.ca, Steven Rostedt <srostedt@...hat.com>,
	Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH 1/5] debugfs - Fix mount directory of debugfs by
 default in events.txt

On Mon, Sep 07, 2009 at 09:15:14PM +0200, Peter Zijlstra wrote:
> On Mon, 2009-09-07 at 11:55 -0700, Greg KH wrote:
> > On Mon, Sep 07, 2009 at 02:48:57PM +0200, Peter Zijlstra wrote:
> > > On Mon, 2009-09-07 at 21:37 +0900, GeunSik Lim wrote:
> > > > 
> > > > >From 99e8ab48d783e619329c31e8f91e4384729a2e8b Mon Sep 17 00:00:00 2001
> > > > From: GeunSik,Lim <leemgs1@...il.com>
> > > > Date: Mon, 7 Sep 2009 20:34:19 +0900
> > > > Subject: [PATCH 1/5] Fix mount directory of debugfs by default in events.txt
> > > > 
> > > > We need common default directory of denbugfs for consistency.
> > > > (debugfs's default directory is /sys/kernel/debug/ by debugfs.)
> > > 
> > > I'd rather we fix that brain-dead default.
> > 
> > Um, why is that "brain-dead"?  It was discussed many times when debugfs
> > first came out and this was what was decided on.
> 
> From what people tell me it wasn't a clear consensus.

Specifics please.

> > So what is the problem?
> 
> Its not related to sysfs in any way I can discover,

So, other filesystems are mounted in sysfs, and in /proc for many years.

> its not consistent with most of the other virtual fs',

What do you mean by this?

> and its way too much typing.

tab completion is your friend, as is environment variables.  Don't
choose stuff just because you are lazy :)

> we don't mount /dev, /proc, /sys in weird places either, so why should
> we mount /debug in a cumbersome location.

Because it is a _kernel_ debug thing, not a system-level debug thing.
What would userspace developers think about /debug ?  Why would they
care about such a thing?

As much as we tend to ignore it, kernel developers are not the primary,
or only, users of Linux :)

thanks,

greg k-h
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