[Intel-gfx] [PATCH 3/3] drm/i915/perf: rate limit spurious oa report notice

[Matthew Auld]

On 22 February 2017 at 15:25, Robert Bragg <robert at sixbynine.org> wrote:
> This change is pre-emptively aiming to avoid a potential cause of kernel
> logging noise in case some condition were to result in us seeing invalid
> OA reports.
>
> The workaround for the OA unit's tail pointer race condition is what
> avoids the primary know cause of invalid reports being seen and with
> that in place we aren't expecting to see this notice but it can't be
> entirely ruled out.
>
> Just in case some condition does lead to the notice then it's likely
> that it will be triggered repeatedly while attempting to append a
> sequence of reports and depending on the configured OA sampling
> frequency that might be a large number of repeat notices.
>
> Signed-off-by: Robert Bragg <robert at sixbynine.org>
Reviewed-by: Matthew Auld <matthew.auld at intel.com>