Date: Fri, 8 May 2015 18:24:52 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Robert Bragg <robert@sixbynine.org>
Cc: intel-gfx@lists.freedesktop.org, Daniel Vetter <daniel.vetter@intel.com>,
        Jani Nikula <jani.nikula@linux.intel.com>,
        David Airlie <airlied@linux.ie>, Paul Mackerras <paulus@samba.org>,
        Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        linux-api@vger.kernel.org
Subject: Re: [RFC PATCH 00/11] drm/i915: Expose OA metrics via perf PMU
Message-ID: <20150508162452.GR27504@twins.programming.kicks-ass.net>
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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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