linux-kernel - Re: [PATCH 03/25] dynamic_debug: use pr_debug instead of pr

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Message-ID: <CAJfuBxwS0rQG=REt9wwYde7d=j1a4z1JdV3fiJ2UexHychCbcw@mail.gmail.com>
Date:	Thu, 28 Jul 2011 15:15:35 -0600
From:	Jim Cromie <jim.cromie@...il.com>
To:	Jason Baron <jbaron@...hat.com>
Cc:	Bart Van Assche <bvanassche@....org>, joe@...ches.com,
	gregkh@...e.de, linux-kernel@...r.kernel.org, gnb@...h.org
Subject: Re: [PATCH 03/25] dynamic_debug: use pr_debug instead of pr_info

On Thu, Jul 28, 2011 at 12:24 PM, Jason Baron <jbaron@...hat.com> wrote:
> On Thu, Jul 28, 2011 at 11:18:56AM +0200, Bart Van Assche wrote:
>> On Wed, Jul 27, 2011 at 11:34 PM, Jim Cromie <jim.cromie@...il.com> wrote:
>> > On Tue, Jul 26, 2011 at 1:08 AM, Bart Van Assche <bvanassche@....org> wrote:
>> >> Changing pr_info() into pr_debug() inside the dynamic_debug
>> >> implementation seems like a really bad idea to me. Such changes make
>> >> it hard to find out via source code reading whether or not there is a
>> >> risk that invoking one of these pr_debug() macros will cause infinite
>> >> recursion.
>> >
>> > WRT earlier discussion (Joe, Jason):
>> >
>> >> I think these should be pr_debug.
>> >> I know you're only using the current style.
>> >>
>> >> Jason, any reason these can not be converted?
>> >
>> > it should be ok, although we have to be careful not to use them in the
>> > printing path, since that will cause a recursion.
>> >
>> > Also, if there is an issue with the dynamic debug code, it makes it more
>> > of a pain to debug :)
>>
>> With this approach enabling all debug printing in the dynamic_debug
>> implementation requires both echoing into .../dynamic_debug/control
>> and setting the "verbose" module parameter. That's not something I
>> would call "elegant", but after all, I'm not the dynamic debug
>> maintainer ...
>>
>> Bart.
>
> we certainly don't want to make ppl do both. why is the verbose param
> still required?
>

Its needed to selectively enable pr_info()s,
which I use cuz they happen too early for pr_debug() to be enabled.
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