linux-kernel - Re: [RFC net-next 0/2] net: Use net_<level>

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Message-Id: <20120515.142405.633851408201128056.davem@davemloft.net>
Date:	Tue, 15 May 2012 14:24:05 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	johannes@...solutions.net
Cc:	joe@...ches.com, netdev@...r.kernel.org,
	linux-decnet-user@...ts.sourceforge.net,
	netfilter-devel@...r.kernel.org, netfilter@...r.kernel.org,
	coreteam@...filter.org, linux-wireless@...r.kernel.org,
	dev@...nvswitch.org, linux-sctp@...r.kernel.org,
	linux-nfs@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC net-next 0/2] net: Use net_<level>_ratelimit

From: Johannes Berg <johannes@...solutions.net>
Date: Tue, 15 May 2012 20:21:34 +0200

> On Tue, 2012-05-15 at 14:13 -0400, David Miller wrote:
>> From: Johannes Berg <johannes@...solutions.net>
>> Date: Tue, 15 May 2012 20:03:48 +0200
>> 
>> > Oops. Yes, please do that, mac80211 doesn't have DEBUG yet
>> 
>> If you want debugging messages you would turn on dynamic_debug
>> via sysctl or whatever, not define DEBUG in your sources.
>> 
>> I don't think we should add yet another interface just to get
>> KERN_DEBUG in there.
> 
> But don't you have to do something in the sources to actually get
> dynamic_debug enabled? I'm concerned this will make mac80211 debugging
> inconsistent - the normal bits are just printk() still, and the
> rate-limited bits need some special enabling? That seems odd.

You can turn them all off or on with a simple flip of a boolean switch
at run-time.  Or, alternatively, you can turn them on or off in a
finer grained manner with other run-time facilities.

There should be a transition away from explicit KERN_DEBUG.
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