[Bug 68641] [HSW]igt/kms_flip/flip-vs-modeset-vs-hang-interruptible causes [drm:i915_hangcheck_elapsed] *ERROR* stuck on render ring with debug kernel

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=68641

Daniel Vetter <daniel at ffwll.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|intel-gfx-bugs at lists.freede |daniel at ffwll.ch
                   |sktop.org                   |
                 CC|                            |gordon.jin at intel.com,
                   |                            |guang.a.yang at intel.com
            Summary|[HSW                        |[HSW]igt/kms_flip/flip-vs-m
                   |nv]igt/kms_flip/flip-vs-mod |odeset-vs-hang-interruptibl
                   |eset-vs-hang-interruptible  |e causes
                   |causes                      |[drm:i915_hangcheck_elapsed
                   |[drm:i915_hangcheck_elapsed |] *ERROR* stuck on render
                   |] *ERROR* stuck on render   |ring with debug kernel
                   |ring with debug kernel      |

--- Comment #1 from Daniel Vetter <daniel at ffwll.ch> ---
This is an i915 test and shouldn't be affected at all by nouveau. Also

[   22.762957] [drm] Simulated gpu hang, resetting stop_rings

so this isn't actually a bug, but just an issue with our debug output being a
bit too noisy.

Now this noisy error output to dmesg was added in

commit 05407ff889ceebe383aa5907219f86582ef96b72
Author: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Date:   Thu May 30 09:04:29 2013 +0300

    drm/i915: detect hang using per ring hangcheck_score

Why was that not caught as a regression? Or have I missed the bug report?

I'll write a quick patch to tune down the debug output.

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