FYI, we noticed the following commit:

https://github.com/0day-ci/linux John-C-Harrison-Intel-com/Convert-requests-to-use-struct-fence/20160616-210317
commit 1c5965229369400cc1cfe7d40d943c626fd915c6 ("drm/i915: Interrupt driven fences")

in testcase: piglit
with following parameters: group=igt-basic

on test machine: lkp-skl-d01: 8 threads Skylake with 8G memory

caused below changes:

[  245.257924] gem_exec_parallel: executing
<14>
[  245.265282] gem_exec_parallel: starting subtest basic
<3>[  250.566231] [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer elapsed... render ring idle
<3>[  256.565738] [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer elapsed... blitter ring idle
<14>
[  259.559234] gem_exec_parallel: exiting, ret=0
<14>
[  260.468018] gem_exec_basic: executing
<14>
[  260.475297] gem_exec_basic: starting subtest basic-render
<14>
[  260.482836] gem_exec_basic: exiting, ret=0
<14>
[  261.208392] gem_sync: executing
<14>
[  261.215271] gem_sync: starting subtest basic-all
<3>[  266.564774] [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer elapsed... render ring idle
<3>[  272.564241] [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer elapsed... blitter ring idle
<14>
[  272.820664] gem_sync: exiting, ret=99
<3>[  278.547782] [drm:i915_hangcheck_elapsed [i915]] *ERROR* Hangcheck timer elapsed... render ring idle
<14>
[  279.304155] kms_addfb_basic: executing
<14>
[  279.309952] kms_addfb_basic: starting subtest addfb25-framebuffer-vs-set-tiling



To reproduce:

        git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Xiaolong