[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 #13 from Hector Velazquez <hector.franciscox.velazquez.suriano at intel.com> ---
igt at gem_sync@vebox

This test has a dmesg-warn on CFL QA 

Tests List:

igt at gem_exec_reloc@readonly-32
igt at gem_reloc_overflow@wrapped-overflow

Note: kernel log has been attached...

IGT-Version: 1.21-g098a401 (x86_64) (Linux: 4.15.0-drm-tip-ww5-commit-d0eb027+
x86_64)

======================================
        dmesg-warn sample
======================================
. . .
[  580.165105] Setting dangerous option reset - tainting kernel
[  604.056004] watchdog: BUG: soft lockup - CPU#11 stuck for 22s!
[gem_exec_reloc:1857]
[  604.056038] Modules linked in: snd_hda_codec_hdmi asix usbnet mii bnep arc4
binfmt_misc nls_iso8859_1 iwlmvm snd_hda_codec_realtek snd_hda_codec_generic
mac80211 8250_dw snd_hda_intel snd_hda_codec intel_rapl x86_pkg_temp_thermal
snd_hda_core intel_powerclamp snd_hwdep coretemp snd_pcm kvm_intel snd_seq_midi
kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc
snd_seq_midi_event snd_rawmidi btusb btrtl aesni_intel btbcm aes_x86_64
crypto_simd btintel glue_helper cryptd snd_seq iwlwifi intel_cstate
intel_rapl_perf bluetooth snd_seq_device input_leds snd_timer snd serio_raw
idma64 wmi_bmof ecdh_generic virt_dma cfg80211 soundcore intel_lpss_pci
intel_pch_thermal intel_lpss tpm_crb acpi_pad mac_hid parport_pc ppdev lp
parport autofs4 hid_generic usbhid uas hid usb_storage i915 e1000e
[  604.056063]  ptp ahci pps_core libahci wmi video
[  604.056079] CPU: 11 PID: 1857 Comm: gem_exec_reloc Tainted: G     U         
 4.15.0-drm-tip-ww5-commit-d0eb027+ #1
[  604.056080] Hardware name: Intel Corporation CoffeeLake Client
Platform/CoffeeLake H DDR4 RVP, BIOS CNLSFWR1.R00.X118.B07.1801040709
01/04/2018
[  604.056114] RIP: 0010:i915_exit+0x44/0x5f4 [i915]
[  604.056114] RSP: 0018:ffffb15004f678e8 EFLAGS: 00050246 ORIG_RAX:
ffffffffffffff11
[  604.056115] RAX: 0000000000000000 RBX: ffffb15004f67b70 RCX:
0000000000000000
[  604.056115] RDX: 0000000000000000 RSI: 0000000000000000 RDI:
0000000000000ff8
[  604.056116] RBP: ffff9c333bbc1340 R08: 0000000000000400 R09:
0000000004b9dc13
[  604.056116] R10: ffff9c333bbc1340 R11: 0000000000000001 R12:
00007fb9976a8410
[  604.056116] R13: 00007fb9976a8270 R14: ffffb15004f67958 R15:
ffff9c3341206ac0
[  604.056117] FS:  00007fba02eac8c0(0000) GS:ffff9c334b4c0000(0000)
knlGS:0000000000000000
[  604.056117] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  604.056118] CR2: 00007fb9976a8270 CR3: 00000008398bc004 CR4:
00000000003606e0
[  604.056119] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[  604.056119] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[  604.056119] Call Trace:
[  604.056133]  i915_gem_do_execbuffer+0x599/0x1060 [i915]
[  604.056136]  ? shmem_getpage_gfp+0x79a/0xcb0
[  604.056137]  ? is_bpf_text_address+0xa/0x20
[  604.056139]  ? __save_stack_trace+0x92/0x100
[  604.056140]  ? create_object+0x24e/0x300
[  604.056151]  i915_gem_execbuffer2+0xee/0x360 [i915]
[  604.056162]  ? i915_gem_execbuffer+0x2d0/0x2d0 [i915]
[  604.056164]  drm_ioctl_kernel+0x65/0xb0
[  604.056165]  drm_ioctl+0x2e5/0x3e0
[  604.056174]  ? i915_gem_execbuffer+0x2d0/0x2d0 [i915]
[  604.056176]  do_vfs_ioctl+0x9f/0x5f0
[  604.056177]  SyS_ioctl+0x74/0x80
[  604.056179]  entry_SYSCALL_64_fastpath+0x24/0x87
[  604.056180] RIP: 0033:0x7fba013b3f47
[  604.056180] RSP: 002b:00007ffe0475bb38 EFLAGS: 00000246
[  604.056181] Code: ff ff ff e9 02 65 f1 ff b9 f2 ff ff ff e9 0a 65 f1 ff b8
f2 ff ff ff 40 30 f6 e9 5d 83 f2 ff b8 f2 ff ff ff 30 d2 e9 62 83 f2 ff <ba> f2
ff ff ff e9 18 9e f2 ff b8 f2 ff ff ff e9 c9 a2 f2 ff b8
. . .

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