Subject: Re: [PATCH net-next 2/2] net: ipv4 and ipv6: Convert printk(KERN_DEBUG to pr_debug

From: Stephen Hemminger <[email-masked]>
Date: Tue, 15 May 2012 18:35:36 -0700

On Tue, 15 May 2012 17:11:54 -0700
Joe Perches <[email-masked]> wrote:

> Use the current debugging style and enable dynamic_debug.
> 
> Signed-off-by: Joe Perches <[email-masked]>

This changes the action of the system. By default:
  printk(KERN_DEBUG "foo\n");
is enabled all the time and prints to log with debug level.

But your version
  pr_debug("foo\n");
defaults to being dropped until the system is built with dynamic
debug, and that particular debug instance is enabled.

Since these are all useful, but low priority messages, not I
don't think disabling them by default is such a great idea now.