linux-kernel - Re: Debugging activated during runtime

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Date:	Sun, 28 Oct 2007 17:18:45 +0100 (CET)
From:	Jan Engelhardt <jengelh@...putergmbh.de>
To:	Roel Kluin <12o3l@...cali.nl>
cc:	lkml <linux-kernel@...r.kernel.org>
Subject: Re: Debugging activated during runtime

On Oct 28 2007 17:07, Roel Kluin wrote:
>Jan Engelhardt wrote:
>> On Oct 28 2007 16:15, Roel Kluin wrote:
>>> Wouldn't it be nice to be able to specify upon loading, or during runtime
>>> to modules whether debug messages should be printed?
>> 
>> modprobe ark3116 debug=1
>> 
>> Nothing new.
>
>Ok, thanks and sorry, I didn't know that.

Loading debug info at runtime is more complex, and I doubt it is worth
the time. If writing a module, carefully consider when to print what.
When pr_*() comes in, this might be a bit relaxed.

>>> - A module could be loaded after an unexpected conditions (e.g. after a BUG_ON).
>> 
>> After a BUG_ON, you are probably next to a panic.
>
>Not always, it appears.
>

But anything can happen. It might end in a panic. Or it might eat your data.
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