Re: [PATCH v9 10/21] drm/i915: Add engine reset count in get-reset-stats ioctl

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Quoting Michel Thierry (2017-06-15 21:18:17)
> Users/tests relying on the total reset count will start seeing a smaller
> number since most of the hangs can be handled by engine reset.
> Note that if reset engine x, context a running on engine y will be unaware
> and unaffected.
> 
> To start the discussion, include just a total engine reset count. If it
> is deemed useful, it can be extended to report each engine separately.
> Our igt's gem_reset_stats test will need changes to ignore the pad field,
> since it can now return reset_engine_count.
> 
> v2: s/engine_reset/reset_engine/, use union in uapi to not break compatibility.
> v3: Keep rejecting attempts to use pad as input (Antonio)

Nope. You have now defined that pad works as an output-only parameter.
It is no longer in a state of flux and can be any value on input. The
test in gem_reset_stats becomes invalid.
-Chris
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