Re: [RFC PATCH 00/11] drm/i915: Expose OA metrics via perf PMU

[Peter Zijlstra]

On Thu, May 07, 2015 at 03:15:43PM +0100, Robert Bragg wrote:

> I've changed the uapi for configuring the i915_oa specific attributes
> when calling perf_event_open(2) whereby instead of cramming lots of
> bitfields into the perf_event_attr config members, I'm now
> daisy-chaining a drm_i915_oa_event_attr_t structure off of a single
> config member that's extensible and validated in the same way as the
> perf_event_attr struct. I've found this much nicer to work with while
> being neatly extensible too.

This worries me a bit.. is there more background for this?
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