FYI, we noticed the following commit: commit: 5a4c6f1b1b2d91c5252cedf1c7b68a894c3f117e ("drm/i915: The return of i915_gpu_info to debugfs") git://anongit.freedesktop.org/drm-intel drm-intel-next-queued in testcase: piglit with following parameters: group: igt-basic test-description: Piglit is a collection of automated tests for OpenGL implementations. test-url: https://people.freedesktop.org/~nh/piglit/ on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 8G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): user :notice: [ 28.580274] 2017-02-18 20:11:49 piglit run igt -t igt/drv_hangman/error-state-basic /tmp/lkp/piglit-results -x igt/drv_hangman/error-state-basic. user :info : [ 29.887103] [IGT] drv_hangman: executing user :info : [ 29.891468] [IGT] drv_hangman: starting subtest error-state-basic user :info : [ 29.898419] [IGT] drv_hangman: exiting, ret=99 user :notice: [ 29.908582] [1/1] fail: 1 | user :notice: [ 29.979716] [1/1] fail: 1 user :notice: [ 29.986934] user :notice: [ 29.992095] Thank you for running Piglit! user :notice: [ 29.998897] Results have been written to /tmp/lkp/piglit-results user :notice: [ 30.007823] igt/drv_hangman/error-state-basic.seconds: 1.515051095 user :notice: [ 30.017154] 2017-02-18 20:11:51 piglit summary console /tmp/lkp/piglit-results/results.json.bz2 user :notice: [ 30.094068] igt/drv_hangman/error-state-basic: fail 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