Re: [PATCH] drm/i915: tune down hangcheck noise

Daniel Vetter
2013-10-31T20:35:57Z

On Thu, Oct 31, 2013 at 9:14 PM, Paulo Zanoni <przanoni@gmail.com> wrote:
> 2013/8/28 Daniel Vetter <daniel.vetter@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
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch