linux-kernel - Re: [rfc] [patch] hook tracer to dynamic debug

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Message-ID: <20081207054840.GA20541@suse.de>
Date:	Sat, 6 Dec 2008 21:48:40 -0800
From:	Greg KH <gregkh@...e.de>
To:	Jason Baron <jbaron@...hat.com>
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org, rostedt@...dmis.org
Subject: Re: [rfc] [patch] hook tracer to dynamic debug

On Fri, Dec 05, 2008 at 02:39:28PM -0500, Jason Baron wrote:
> hi,
> 
> Currently, the dynamic debug framework uses 'printk' for output. Here,
> i've hooked the backend of the dynamic debug framework to the tracing 
> framework. This allows the dynamic debug output to be seaprated from the
> system log, and allows for higher performance.

Is this really an issue most of the time?

I know logs can get full, but this seems like a bit of an overkill :)

> I've implemented it as a compile time option, but a user might want to
> be able to toggle b/w 'printk' and the tracer at run-time...other
> ideas? Patch is against the -tip tree...

It would have to be a run-time option if you want any distro to ever be
able to enable this in their kernels.

thanks,

greg k-h
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