Re: [rfc] [patch] hook tracer to dynamic debug

From: Greg KH
Date: Sun Dec 07 2008 - 00:58:00 EST

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.


greg k-h
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at