[Bug 103738] [IGT] igt at gem_exec/igt at gem_reloc/igt at sync some subtests has a dmesg-warn watchdog: BUG: soft lockup - CPU#1 stuck for 23s!

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103738

--- Comment #20 from Octavio <octaviox.hernandez.lopez at intel.com> ---
The below test fails on CFL QA 

igt at gem_exec_reloc@readonly-31

IGT-Version: 1.21-ga2664f8 (x86_64) (Linux:
4.16.0-rc2-drm-intel-qa-ww9-commit-01a067a+ x86_64)
Subtest readonly-31: SUCCESS (61.994s)

[   80.321442] Setting dangerous option reset - tainting kernel
[  104.043998] watchdog: BUG: soft lockup - CPU#10 stuck for 22s!
[gem_exec_reloc:1642]
[  104.044001] Modules linked in: cmac bnep snd_hda_codec_hdmi arc4
snd_hda_codec_realtek snd_hda_codec_generic 8250_dw nls_iso8859_1 iwlmvm
intel_rapl mac80211 x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel
snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep kvm snd_pcm snd_seq_midi
snd_seq_midi_event irqbypass crct10dif_pclmul snd_rawmidi crc32_pclmul
ghash_clmulni_intel pcbc iwlwifi snd_seq snd_seq_device snd_timer btusb
aesni_intel btrtl btbcm aes_x86_64 crypto_simd btintel glue_helper cryptd
input_leds bluetooth snd intel_cstate idma64 wmi_bmof serio_raw cfg80211
ecdh_generic intel_rapl_perf virt_dma soundcore intel_lpss_pci shpchp
intel_lpss intel_pch_thermal acpi_pad mac_hid parport_pc ppdev lp parport
ip_tables x_tables autofs4 i915 e1000e ahci libahci wmi video
[  104.044053] CPU: 10 PID: 1642 Comm: gem_exec_reloc Tainted: G     U         
 4.16.0-rc2-drm-intel-qa-ww9-commit-01a067a+ #1
[  104.044054] Hardware name: Intel Corporation CoffeeLake Client
Platform/CoffeeLake S UDIMM RVP, BIOS CNLSFWR1.R00.X118.B07.1801040709
01/04/2018
[  104.044087] RIP: 0010:i915_exit+0x44/0xc56 [i915]
[  104.044087] RSP: 0018:ffffa3e1c3bdf8d0 EFLAGS: 00050246 ORIG_RAX:
ffffffffffffff12
[  104.044088] RAX: 0000000000000000 RBX: ffffa3e1c3bdfb58 RCX:
0000000000000000
[  104.044089] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
0000000000000ff8
[  104.044089] RBP: ffff90f7d0721340 R08: 0000000000000400 R09:
000000000341d575
[  104.044090] R10: ffff90f7d0721340 R11: 0000000000000001 R12:
00007f4e79c3a010
[  104.044090] R13: 00007f4e79c39eb0 R14: ffffa3e1c3bdf980 R15:
ffff90f7cf513d00
[  104.044091] FS:  00007f4e94c598c0(0000) GS:ffff90f7dd080000(0000)
knlGS:0000000000000000
[  104.044091] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  104.044092] CR2: 00007f4e79c39eb0 CR3: 0000000453078001 CR4:
00000000003606e0
[  104.044092] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[  104.044093] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[  104.044093] Call Trace:
[  104.044107]  i915_gem_do_execbuffer+0x598/0x1060 [i915]
[  104.044110]  ? shmem_getpage_gfp+0x79f/0xcd0
[  104.044111]  ? is_bpf_text_address+0xa/0x20
[  104.044113]  ? __save_stack_trace+0x92/0x100
[  104.044115]  ? create_object+0x24e/0x300
[  104.044126]  i915_gem_execbuffer2_ioctl+0xee/0x360 [i915]
[  104.044135]  ? i915_gem_execbuffer_ioctl+0x2d0/0x2d0 [i915]
[  104.044137]  drm_ioctl_kernel+0x67/0xb0
[  104.044139]  drm_ioctl+0x2f4/0x3f0
[  104.044148]  ? i915_gem_execbuffer_ioctl+0x2d0/0x2d0 [i915]
[  104.044150]  ? vma_merge+0xc8/0x330
[  104.044152]  do_vfs_ioctl+0xa2/0x610
[  104.044153]  SyS_ioctl+0x74/0x80
[  104.044155]  do_syscall_64+0x6e/0x120
[  104.044156]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[  104.044157] RIP: 0033:0x7f4e92e39ef7
[  104.044158] RSP: 002b:00007ffe8c904368 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[  104.044158] RAX: ffffffffffffffda RBX: 0000000000000003 RCX:
00007f4e92e39ef7
[  104.044159] RDX: 00007ffe8c904420 RSI: 0000000040406469 RDI:
0000000000000003
[  104.044159] RBP: 00007ffe8c904420 R08: ffffffffffffffff R09:
0000000000000000
[  104.044160] R10: 000000000000049e R11: 0000000000000246 R12:
0000000040406469
[  104.044160] R13: 0000000000000003 R14: 00007ffe8c904420 R15:
0000000004000000
[  104.044161] Code: ff ff ff e9 84 0c f1 ff b9 f2 ff ff ff e9 8c 0c f1 ff b8
f2 ff ff ff 40 30 f6 e9 72 34 f2 ff b8 f2 ff ff ff 30 d2 e9 7a 34 f2 ff <ba> f2
ff ff ff e9 0a 4f f2 ff b8 f2 ff ff ff e9 bb 53 f2 ff b8

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