linux-kernel - Re: [PATCH] plist: replace pr_debug with printk in plist

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Date:	Wed, 7 May 2014 14:19:56 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Joe Perches <joe@...ches.com>
Cc:	Dan Streetman <ddstreet@...e.org>,
	Fabian Frederick <fabf@...net.be>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <borislav.petkov@....com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] plist: replace pr_debug with printk in plist_test()

On Wed, 07 May 2014 11:10:38 -0700
Joe Perches <joe@...ches.com> wrote:

> On Wed, 2014-05-07 at 10:35 -0400, Steven Rostedt wrote:
> > On Wed, 7 May 2014 10:21:28 -0400 Dan Streetman <ddstreet@...e.org> wrote:
> 
> > > It would be even better if the note could clarify that sometimes it is
> > > ok to use printk(KERN_DEBUG
> > 
> > Exactly. I think it's rather stupid to have to do a #define DEBUG to
> > have pr_debug() print in general.
> > 
> > I see no reason to have pr_debug() be anything different than the other
> > pr_*() functions.
> 
> pr_debug is meant to be disabled and have _no_ runtime
> effect unless DEBUG is #defined.

I understand why it does it, but having pr_debug() named just like
pr_info(), pr_notice(), pr_warning(), pr_err(), pr_crit(), pr_alert(),
pr_emerg(), where all those are just printk(<LOGLEVEL>...) *except* for
pr_debug(). That's inconsistent and wrong.

pr_debug() should have been just printk(KERN_DEBUG ...) as that follows
convention. Not something that gets disabled by default. For that, we
should have given it a different name. That's the point I was trying to
make.

Yes, it's somewhat too late as pr_debug() is all over the place, but
maybe when things slow down (Ha! like that will ever happen ... "are we
done yet?"), then we could do a massive clean up and rename pr_debug()
to something not so confusing in its usage compared to the other pr_*()
prints.

-- Steve

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