Re: [PATCH] of: introduce event tracepoints for dynamic device_node lifecyle

[Steven Rostedt]

On Tue, 18 Apr 2017 18:42:32 -0700
Frank Rowand <frowand.list@xxxxxxxxx> wrote:

> And of course the other issue with using tracepoints is the extra space
> required to hold the tracepoint info.  With the pr_debug() approach, the
> space usage can be easily removed for a production kernel via a config
> option.

Now if you are saying you want to be able to enable debugging without
the tracing infrastructure I would agree. As the tracing infrastructure
is large. But I'm working on shrinking it more.

> 
> Tracepoints are wonderful technology, but not always the proper tool to
> use for debug info.

But if you are going to have tracing enabled regardless, adding a few
more tracepoints isn't going to make the difference.

-- Steve

> 
> > If Rob wants to convert printk() style data to trace data (and I can't
> > convince him otherwise) then I will have further comments on this specific
> > patch.
> >