[PATCH v3] drm: Funnel drm logs to tracepoints

[Sean Paul]

On Fri, Dec 13, 2019 at 11:54:36AM -0500, Steven Rostedt wrote:
> On Fri, 13 Dec 2019 11:47:03 -0500
> Sean Paul <sean at poorly.run> wrote:
> 
> > > Why is there a separate trace event for each of these?
> > >   
> > 
> > To make it easier on userspace to enable just a single drm category.
> > 
> 
> But trace events can easily be filtered. Say you have a field called
> category, you could then just set in the trace event filter:
> 
>  echo 'category == 1 || category == 5 || (category > 8 && category < 12)' > /sys/kernel/tracing/drm_print/drm_category_log/filter
>  echo 1 > /sys/kernel/tracing/drm_print/drm_category_log/enable

Hmm, true. I suppose the only downside would be that this would cause all logs
to be processed/assigned as trace events before the filter is applied. That's a
lot of extra work each frame.

Sean

> 
> -- Steve

-- 
Sean Paul, Software Engineer, Google / Chromium OS