[Intel-gfx] [PATCH] drm/i915: tune down hangcheck noise

Daniel Vetter daniel.vetter at ffwll.ch
Thu Oct 31 21:35:56 CET 2013

On Thu, Oct 31, 2013 at 9:14 PM, Paulo Zanoni <przanoni at gmail.com> wrote:
> 2013/8/28 Daniel Vetter <daniel.vetter at ffwll.ch>:
>> We already have a big splashing *ERROR* for all the relevant cases of
>> hangs, so this one here is redudant. And it results in an unclean
>> dmesg when running with simulated hangs. Regression has been
>> introduced in
> Bug https://bugs.freedesktop.org/show_bug.cgi?id=69747 has a case
> where despite the messages, there's no splashing *ERROR* (except for
> an unclaimed-register message which should be ignored in this specific
> case since it can be fixed without fixing the GPU hang). As a
> consequence, QA reported the bug mentioning just the "unclaimed
> regsiter" message, not the real GPU hang, while the unclaimed register
> is just a consequence of the real GPU hang. ZZ_check_dmesg wouldn't
> catch this specific bug if we didn't have the unclaimed register
> problem. If the same bug happens on IVB we'll never know because we
> won't have the "unclaimed register" message to point it.

This is just a testcase that uses a simulated gpu hang, so the hang
message is tuned down from ERROR to the info level. So the only real
bug is indeed the unclaimed register writes.
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

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