[Bug 103514] [BAT] [GLK-DSI only] igt at gem_* - Failed assertion: !"GPU hung" - and its aftermath

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103514

--- Comment #36 from Marta Löfstedt <marta.lofstedt at intel.com> ---
ON CI_DRM_3606:
First test with dmesg warn:
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3606/fi-glk-dsi/igt@gem_exec_flush@basic-batch-kernel-default-uc.html
then a lot of the following following igt at gem_exec_* tests are hit with
dmesg-warn. 

It started here:

<4>[  120.453872] WARNING: CPU: 3 PID: 0 at kernel/sched/core.c:3459
schedule_idle+0x2c/0x30
<4>[  120.453878] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek
snd_hda_codec_generic x86_pkg_temp_thermal intel_powerclamp coretemp i915
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_intel snd_hda_codec
snd_hwdep snd_hda_core snd_pcm mei_me r8169 mii mei prime_numbers i2c_hid
pinctrl_geminilake pinctrl_intel
<4>[  120.453969] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G     U          
4.15.0-rc7-CI-CI_DRM_3606+ #1
<4>[  120.453973] Hardware name: Intel Corp. Geminilake/GLK RVP2 LP4SD (07),
BIOS GELKRVPA.X64.0062.B30.1708222146 08/22/2017
<4>[  120.453979] RIP: 0010:schedule_idle+0x2c/0x30
<4>[  120.453983] RSP: 0018:ffffc900000d3ee8 EFLAGS: 00010286
<4>[  120.453991] RAX: ee000000fe000000 RBX: 0000000000000003 RCX:
0000000000000001
<4>[  120.453995] RDX: 0000000000000000 RSI: ffffffff820ab24f RDI:
ffffffff820b8d9d
<4>[  120.453998] RBP: ffff88017a942740 R08: 0000000000000000 R09:
0000000000000001
<4>[  120.454002] R10: 0000000000000000 R11: 0000000000000000 R12:
ffffffff8233caf0
<4>[  120.454006] R13: ffff88017a942740 R14: ffff88017fdab550 R15:
ffffffff82293980
<4>[  120.454010] FS:  0000000000000000(0000) GS:ffff88017fd80000(0000)
knlGS:0000000000000000
<4>[  120.454014] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[  120.454018] CR2: 00007f8fab777000 CR3: 000000016f6fc000 CR4:
0000000000340ee0
<4>[  120.454022] Call Trace:
<4>[  120.454031]  do_idle+0x14b/0x1d0
<4>[  120.454042]  cpu_startup_entry+0x14/0x20
<4>[  120.454049]  start_secondary+0x129/0x160
<4>[  120.454057]  secondary_startup_64+0xa5/0xb0
<4>[  120.454076] Code: 48 8b 04 25 80 4e 01 00 53 48 8b 40 08 48 85 c0 75 19
65 48 8b 1c 25 80 4e 01 00 31 ff e8 cd f0 ff ff 48 8b 03 a8 08 75 f2 5b c3 <0f>
ff eb e3 bf 01 00 00 00 e8 e6 e8 7e ff e8 a1 fb ff ff bf 01 

Then there is ~170Mb of various WARNs from: kernel/locking/lockdep.c

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