[Bug 89644] New: [BSW]igt/gem_cs_prefetch causes *ERROR* Hangcheck timer elapsed... render ring idle

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89644

            Bug ID: 89644
           Summary: [BSW]igt/gem_cs_prefetch causes *ERROR* Hangcheck
                    timer elapsed... render ring idle
           Product: DRI
           Version: unspecified
          Hardware: All
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: huax.lu at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 114428
  --> https://bugs.freedesktop.org/attachment.cgi?id=114428&action=edit
dmesg

==System Environment==
--------------------------
Regression: not sure, I am unable to find good commit

no-working platforms: BSW

==kernel==
--------------------------
drm-intel-nightly/3753ea527e539d3358a6368e77cb29ecb2e71c42
commit 3753ea527e539d3358a6368e77cb29ecb2e71c42
Author: Daniel Vetter <daniel.vetter at ffwll.ch>
Date:   Tue Mar 17 22:36:04 2015 +0100

    drm-intel-nightly: 2015y-03m-17d-21h-35m-20s UTC integration manifest

==Bug detailed description==
-----------------------------
It causes <3>[   95.780262] [drm:i915_hangcheck_elapsed [i915]] *ERROR*
Hangcheck timer elapsed... render ring idle on BSW. Test the latest
drm-intel-nightly and drm-intel-next-queued kernel. Test kernel:
2015_01_18/drm-intel-nightly/be0b52082364f73b6ffa2841ec4ded2ddecfa881, it also
has this issue..

output:
IGT-Version: 1.10-g505645c (x86_64) (Linux:
4.0.0-rc4_drm-intel-nightly_3753ea_20150318+ x86_64)
gem_cs_prefetch: 100%
Test suceeded, cleanup up - this might take a while.
SUCCESS (67.727s)

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