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

using IGT-Version: 1.21-g68fb759 (x86_64) (Linux:
4.16.0-rc4-drm-intel-qa-ww10-commit-a994c52+ x86_64)

[   59.150255] Setting dangerous option reset - tainting kernel
[   84.047998] watchdog: BUG: soft lockup - CPU#5 stuck for 23s!
[gem_exec_reloc:1786]
[   84.048001] Modules linked in: snd_hda_codec_hdmi cmac bnep arc4
nls_iso8859_1 8250_dw snd_hda_codec_realtek iwlmvm snd_hda_codec_generic
mac80211 intel_rapl x86_pkg_temp_thermal snd_hda_intel intel_powerclamp
coretemp snd_hda_codec snd_hda_core kvm_intel snd_hwdep snd_pcm kvm
snd_seq_midi snd_seq_midi_event snd_rawmidi irqbypass crct10dif_pclmul
crc32_pclmul ghash_clmulni_intel pcbc snd_seq btusb aesni_intel snd_seq_device
btrtl snd_timer aes_x86_64 crypto_simd glue_helper cryptd btbcm intel_cstate
iwlwifi btintel snd idma64 virt_dma intel_rapl_perf input_leds bluetooth
serio_raw ecdh_generic mei_me wmi_bmof cfg80211 soundcore shpchp
intel_pch_thermal mei intel_lpss_pci intel_lpss acpi_pad mac_hid parport_pc
ppdev lp parport ip_tables x_tables autofs4 i915 e1000e ahci libahci
prime_numbers wmi video
[   84.048053] CPU: 5 PID: 1786 Comm: gem_exec_reloc Tainted: G     U          
4.16.0-rc4-drm-intel-qa-ww10-commit-a994c52+ #1
[   84.048054] Hardware name: Intel Corporation CoffeeLake Client
Platform/CoffeeLake S UDIMM RVP, BIOS CNLSFWR1.R00.X118.B07.1801040709
01/04/2018
[   84.048087] RIP: 0010:i915_exit+0x44/0xe08 [i915]
[   84.048087] RSP: 0018:ffffb42f0263f8d0 EFLAGS: 00050246 ORIG_RAX:
ffffffffffffff12
[   84.048088] RAX: 0000000000000000 RBX: ffffb42f0263fb58 RCX:
0000000000000000
[   84.048089] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
0000000000000ff8
[   84.048089] RBP: ffff950f8bd3aa00 R08: 0000000000000400 R09:
000000000362b653
[   84.048090] R10: ffff950f8bd3aa00 R11: 0000000000000001 R12:
00007f57c2926c10
[   84.048090] R13: 00007f57c2926a70 R14: ffffb42f0263f940 R15:
ffff950f8f529e80
[   84.048091] FS:  00007f57d97848c0(0000) GS:ffff950f9cf40000(0000)
knlGS:0000000000000000
[   84.048091] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   84.048092] CR2: 00007f57c2926a70 CR3: 000000044b436001 CR4:
00000000003606e0
[   84.048092] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[   84.048093] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[   84.048093] Call Trace:
[   84.048106]  i915_gem_do_execbuffer+0x598/0x1060 [i915]
[   84.048110]  ? shmem_getpage_gfp+0x7a1/0xcf0
[   84.048111]  ? is_bpf_text_address+0xa/0x20
[   84.048113]  ? __save_stack_trace+0x92/0x100
[   84.048114]  ? create_object+0x24e/0x300
[   84.048125]  i915_gem_execbuffer2_ioctl+0xee/0x360 [i915]
[   84.048135]  ? i915_gem_execbuffer_ioctl+0x2d0/0x2d0 [i915]
[   84.048137]  drm_ioctl_kernel+0x67/0xb0
[   84.048139]  drm_ioctl+0x2f4/0x3f0
[   84.048148]  ? i915_gem_execbuffer_ioctl+0x2d0/0x2d0 [i915]
[   84.048150]  ? vma_merge+0xc8/0x330
[   84.048152]  do_vfs_ioctl+0xa2/0x610
[   84.048153]  SyS_ioctl+0x74/0x80
[   84.048155]  do_syscall_64+0x6e/0x120
[   84.048156]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   84.048157] RIP: 0033:0x7f57d7964ef7
[   84.048158] RSP: 002b:00007ffebfa762b8 EFLAGS: 00000246 ORIG_RAX:
0000000000000010
[   84.048159] RAX: ffffffffffffffda RBX: 0000000000000003 RCX:
00007f57d7964ef7
[   84.048159] RDX: 00007ffebfa76370 RSI: 0000000040406469 RDI:
0000000000000003
[   84.048159] RBP: 00007ffebfa76370 R08: ffffffffffffffff R09:
0000000000000000
[   84.048160] R10: 000000000000049e R11: 0000000000000246 R12:
0000000040406469
[   84.048160] R13: 0000000000000003 R14: 00007ffebfa76370 R15:
0000000004000000
[   84.048161] Code: ff ff ff e9 d6 08 f1 ff b9 f2 ff ff ff e9 de 08 f1 ff b8
f2 ff ff ff 40 30 f6 e9 94 30 f2 ff b8 f2 ff ff ff 30 d2 e9 9c 30 f2 ff <ba> f2
ff ff ff e9 2c 4b f2 ff b8 f2 ff ff ff e9 dd 4f f2 ff b8

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