[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 #25 from Octavio <octaviox.hernandez.lopez at intel.com> ---
The below test has dmesg-warn on CFL QA

igt at gem_exec_reloc@readonly-31

IGT-Version: 1.22-g94e8862 (x86_64) (Linux:
4.16.0-rc6-drm-intel-qa-ww12-commit-9d737ce+ x86_64)
Subtest readonly-31: SUCCESS (65.823s)

[   61.528380] Setting dangerous option reset - tainting kernel
[   88.043998] watchdog: BUG: soft lockup - CPU#1 stuck for 22s!
[gem_exec_reloc:1819]
[   88.044001] Modules linked in: snd_hda_codec_hdmi cmac bnep arc4
nls_iso8859_1 8250_dw iwlmvm snd_hda_codec_realtek snd_hda_codec_generic
intel_rapl mac80211 x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel
snd_hda_intel kvm snd_hda_codec irqbypass snd_hda_core crct10dif_pclmul
crc32_pclmul snd_hwdep ghash_clmulni_intel snd_pcm pcbc snd_seq_midi
snd_seq_midi_event snd_rawmidi aesni_intel btusb aes_x86_64 crypto_simd btrtl
glue_helper cryptd snd_seq btbcm asix btintel iwlwifi usbnet intel_cstate
snd_seq_device mii bluetooth intel_rapl_perf input_leds snd_timer idma64
ecdh_generic serio_raw wmi_bmof virt_dma snd mei_me cfg80211 intel_lpss_pci mei
intel_pch_thermal intel_lpss soundcore acpi_pad mac_hid parport_pc ppdev lp
parport ip_tables x_tables autofs4 i915 e1000e ahci libahci prime_numbers
[   88.044051]  wmi video
[   88.044053] CPU: 1 PID: 1819 Comm: gem_exec_reloc Tainted: G     U          
4.16.0-rc6-drm-intel-qa-ww12-commit-9d737ce+ #1
[   88.044053] Hardware name: Intel Corporation CoffeeLake Client
Platform/CoffeeLake S UDIMM RVP, BIOS CNLSFWR1.R00.X118.B09.1801120459
01/12/2018
[   88.044100] RIP: 0010:i915_exit+0x44/0xa01 [i915]
[   88.044100] RSP: 0018:ffffbe46c3e278d0 EFLAGS: 00050246 ORIG_RAX:
ffffffffffffff12
[   88.044101] RAX: 0000000000000000 RBX: ffffbe46c3e27b58 RCX:
ffff98a3d6933004
[   88.044102] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
0000000000000000
[   88.044102] RBP: ffff98a3d60f2400 R08: 0000000000001000 R09:
0000000003637064
[   88.044103] R10: ffff98a3d60f2400 R11: 0000000000000001 R12:
00007f59831fde10
[   88.044103] R13: 00007f59831fdc90 R14: ffffbe46c3e27960 R15:
ffff98a3cf35bd00
[   88.044104] FS:  00007f5999ee78c0(0000) GS:ffff98a3dd240000(0000)
knlGS:0000000000000000
[   88.044104] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   88.044105] CR2: 00007f59831fdc90 CR3: 000000044b738002 CR4:
00000000003606e0
[   88.044105] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[   88.044106] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[   88.044106] Call Trace:
[   88.044120]  i915_gem_do_execbuffer+0x591/0x1020 [i915]
[   88.044123]  ? shmem_getpage_gfp+0x7a1/0xcf0
[   88.044125]  ? is_bpf_text_address+0xa/0x20
[   88.044126]  ? __save_stack_trace+0x92/0x100
[   88.044128]  ? create_object+0x24e/0x300
[   88.044139]  i915_gem_execbuffer2_ioctl+0xe7/0x340 [i915]
[   88.044149]  ? i915_gem_execbuffer_ioctl+0x2b0/0x2b0 [i915]
[   88.044151]  drm_ioctl_kernel+0x67/0xb0
[   88.044152]  drm_ioctl+0x2d4/0x3c0
[   88.044161]  ? i915_gem_execbuffer_ioctl+0x2b0/0x2b0 [i915]
[   88.044163]  ? vma_merge+0xc8/0x330
[   88.044165]  do_vfs_ioctl+0xa2/0x610
[   88.044166]  SyS_ioctl+0x74/0x80
[   88.044168]  do_syscall_64+0x6e/0x120
[   88.044170]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   88.044171] RIP: 0033:0x7f59980c7ef7
[   88.044171] RSP: 002b:00007ffc5bb6a6d8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[   88.044172] RAX: ffffffffffffffda RBX: 0000000000000003 RCX:
00007f59980c7ef7
[   88.044172] RDX: 00007ffc5bb6a790 RSI: 0000000040406469 RDI:
0000000000000003
[   88.044173] RBP: 00007ffc5bb6a790 R08: ffffffffffffffff R09:
0000000000000000
[   88.044173] R10: 000000000000049e R11: 0000000000000246 R12:
0000000040406469
[   88.044174] R13: 0000000000000003 R14: 00007ffc5bb6a790 R15:
0000000004000000
[   88.044174] Code: ff ff ff e9 ef 15 f1 ff b9 f2 ff ff ff e9 f7 15 f1 ff b8
f2 ff ff ff 40 30 f6 e9 7d 3f f2 ff b8 f2 ff ff ff 30 d2 e9 85 3f f2 ff <ba> f2
ff ff ff e9 15 5a f2 ff b8 f2 ff ff ff e9 c6 5e f2 ff b8

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