Greeting,

FYI, we noticed the following commit (built with gcc-9):

commit: d9d29c747df844e946ecd6089893be80c5d32403 ("drm/i915/gem: Don't allow changing the engine set on running contexts (v3)") git://anongit.freedesktop.org/drm-intel drm-intel-gt-next

in testcase: igt version: igt-x86_64-098d0b82-1_20210701 with following parameters:

group: group-09 ucode: 0xe2

on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 28G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):

If you fix the issue, kindly add following tag Reported-by: kernel test robot oliver.sang@intel.com

[ 61.793502] [ 61.799687] - With timeslicing enabled [ 61.799689] [ 61.805694] Starting subtest: default-virtual [ 61.805696] [ 61.813914] (gem_watchdog:1648) CRITICAL: Test assertion failure function set_load_balancer, file ../tests/i915/gem_watchdog.c:244: [ 61.813917] [ 61.827334] Console: switching to colour dummy device 80x25 [ 61.829275] (gem_watchdog:1648) CRITICAL: Failed assertion: __set_load_balancer(i915, ctx, ci, count, ext) == 0 [ 61.832911] [ 61.833008] [IGT] kms_cdclk: executing

To reproduce:

git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run bin/lkp run generated-yaml-file

--- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation

Thanks, Oliver Sang