linux-kernel - [drm] c3b790ea07: last_state.is_incomplete

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Message-ID: <20200831080213.GA20948@xsang-OptiPlex-9020>
Date:   Mon, 31 Aug 2020 16:02:13 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     Daniel Vetter <daniel.vetter@...ll.ch>
Cc:     Sam Ravnborg <sam@...nborg.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Noralf Trønnes <noralf@...nnes.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Daniel Vetter <daniel.vetter@...el.com>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org,
        lkp@...el.com
Subject: [drm]  c3b790ea07: last_state.is_incomplete_run

Greeting,

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

commit: c3b790ea07a13da0c46816bda6b04abef346af15 ("drm: Manage drm_mode_config_init with drmm_")
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master


in testcase: igt
with following parameters:

	group: group_04
	ucode: 0x7000019



on test machine: 16 threads Intel(R) Xeon(R) CPU D-1541 @ 2.10GHz with 48G memory

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

kern  :info  : [   43.291998] Console: switching to colour dummy device 80x25
user  :info  : [   43.297631] [IGT] core_hotunplug: executing    <----- just stuck here which not observed in parent commit


also attached kmsg-parent.xz as reference.
Though there are "Call Trace" show up, the test can go on. 

user  :info  : [   44.410403] [IGT] core_hotunplug: executing
user  :info  : [   44.425311] [IGT] core_hotunplug: starting subtest unbind-rebind
...
kern  :info  : [   51.462427] Console: switching to colour frame buffer device 128x48
user  :info  : [   51.471683] [IGT] kms_color: exiting, ret=77


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




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 run     job.yaml



Thanks,
Oliver Sang


View attachment "config-5.6.0-rc5-01611-gc3b790ea07a13" of type "text/plain" (155088 bytes)

View attachment "job-script" of type "text/plain" (5426 bytes)

Download attachment "kmsg.xz" of type "application/x-xz" (22108 bytes)

View attachment "job.yaml" of type "text/plain" (4428 bytes)

Download attachment "kmsg-parent.xz" of type "application/x-xz" (27876 bytes)