ON CI_DRM_3126 igt@gem_busy@close-race incompletes

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_3126/shard-hsw6/igt@gem_busy@close-race.html

<7>[  313.752576] [drm:intelfb_create [i915]] no BIOS fb, allocating a new one
<3>[  314.725474] Failed to start request b
<0>[  348.422049] watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [swapper/4:0]
<4>[  348.422074] Modules linked in: i915(+) snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp coretemp crct10dif_pclmul snd_hda_codec_realtek crc32_pclmul snd_hda_codec_generic ghash_clmulni_intel snd_hda_codec snd_hwdep snd_hda_core r8169 snd_pcm mei_me mii lpc_ich mei prime_numbers [last unloaded: i915]
<4>[  348.422146] irq event stamp: 15454047
<4>[  348.422152] hardirqs last  enabled at (15454046): [<ffffffff819107bd>] restore_regs_and_iret+0x0/0x1d
<4>[  348.422156] hardirqs last disabled at (15454047): [<ffffffff819117e5>] apic_timer_interrupt+0x95/0xa0
<4>[  348.422161] softirqs last  enabled at (12679772): [<ffffffff81085251>] _local_bh_enable+0x21/0x40
<4>[  348.422165] softirqs last disabled at (12679773): [<ffffffff81085645>] irq_exit+0xb5/0xd0
<4>[  348.422169] CPU: 4 PID: 0 Comm: swapper/4 Tainted: G     U          4.14.0-rc1-CI-CI_DRM_3126+ #1
<4>[  348.422173] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12 02/15/2016
<4>[  348.422176] task: ffff88040d5a8040 task.stack: ffffc900000ac000
<4>[  348.422180] RIP: 0010:__do_softirq+0xa3/0x4e2
<4>[  348.422183] RSP: 0018:ffff88041fb03f58 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
<4>[  348.422190] RAX: 00000000ffffffff RBX: ffff88040d5a8040 RCX: 0000000000000000
<4>[  348.422194] RDX: 0000000000000000 RSI: ffffffff81d0ddbc RDI: ffffffff81cc1bee
<4>[  348.422197] RBP: ffff88041fb03fb8 R08: 0000000000000000 R09: 0000000000000000
<4>[  348.422200] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
<4>[  348.422203] R13: ffff88040d5a8040 R14: 0000000000000000 R15: 0000000000000000
<4>[  348.422207] FS:  0000000000000000(0000) GS:ffff88041fb00000(0000) knlGS:0000000000000000
<4>[  348.422211] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[  348.422214] CR2: 00007fc893427000 CR3: 0000000402329002 CR4: 00000000001606e0
<4>[  348.422217] Call Trace:
<4>[  348.422221]  <IRQ>
<4>[  348.422228]  irq_exit+0xb5/0xd0
<4>[  348.422232]  smp_apic_timer_interrupt+0x9e/0x2e0
<4>[  348.422236]  apic_timer_interrupt+0x9a/0xa0
<4>[  348.422239]  </IRQ>
<4>[  348.422244] RIP: 0010:tick_nohz_idle_exit+0x114/0x180
<4>[  348.422248] RSP: 0018:ffffc900000afed0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
<4>[  348.422254] RAX: ffff88040d5a8040 RBX: ffff88040d5a8040 RCX: 0000000000000001
<4>[  348.422258] RDX: 0000000000000000 RSI: ffffffff81d0ddbc RDI: ffffffff81cc1bee
<4>[  348.422261] RBP: ffffc900000afed8 R08: 0000000000000000 R09: 0000000000000001
<4>[  348.422264] R10: 0000000000000000 R11: 0000000000000000 R12: 0000004b38d4ed68
<4>[  348.422268] R13: ffff88040d5a8040 R14: 0000000000000000 R15: 0000000000000000
<4>[  348.422277]  do_idle+0x13d/0x1e0
<4>[  348.422282]  cpu_startup_entry+0x1d/0x20
<4>[  348.422286]  start_secondary+0x11c/0x140
<4>[  348.422291]  secondary_startup_64+0xa5/0xa5
<4>[  348.422299] Code: 00 00 e8 11 ac 7c ff c7 45 c8 0a 00 00 00 48 89 5d a8 48 c7 c0 40 86 01 00 65 c7 00 00 00 00 00 e8 23 76 7c ff fb b8 ff ff ff ff <48> c7 45 c0 00 51 e0 81 0f bc 45 d4 83 c0 01 89 45 d0 75 6a e9 
<0>[  348.422498] Kernel panic - not syncing: softlockup: hung tasks
<4>[  348.422517] CPU: 4 PID: 0 Comm: swapper/4 Tainted: G     U       L  4.14.0-rc1-CI-CI_DRM_3126+ #1
<4>[  348.422542] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12 02/15/2016
<4>[  348.422564] Call Trace:
<4>[  348.422574]  <IRQ>
<4>[  348.422585]  dump_stack+0x68/0x9f
<4>[  348.422599]  panic+0xd4/0x21d
<4>[  348.422614]  watchdog_timer_fn+0x289/0x290
<4>[  348.422631]  __hrtimer_run_queues+0xed/0x4d0
<4>[  348.422646]  ? __touch_watchdog+0x30/0x30
<4>[  348.422662]  hrtimer_interrupt+0xc1/0x220
<4>[  348.422679]  smp_apic_timer_interrupt+0x7d/0x2e0
<4>[  348.422695]  apic_timer_interrupt+0x9a/0xa0
<4>[  348.422710] RIP: 0010:__do_softirq+0xa3/0x4e2
<4>[  348.422724] RSP: 0018:ffff88041fb03f58 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
<4>[  348.422750] RAX: 00000000ffffffff RBX: ffff88040d5a8040 RCX: 0000000000000000
<4>[  348.422771] RDX: 0000000000000000 RSI: ffffffff81d0ddbc RDI: ffffffff81cc1bee
<4>[  348.422793] RBP: ffff88041fb03fb8 R08: 0000000000000000 R09: 0000000000000000
<4>[  348.422814] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
<4>[  348.422835] R13: ffff88040d5a8040 R14: 0000000000000000 R15: 0000000000000000
<4>[  348.422861]  ? __do_softirq+0x9d/0x4e2
<4>[  348.422878]  irq_exit+0xb5/0xd0
<4>[  348.422890]  smp_apic_timer_interrupt+0x9e/0x2e0
<4>[  348.422906]  apic_timer_interrupt+0x9a/0xa0
<4>[  348.422920]  </IRQ>
<4>[  348.422931] RIP: 0010:tick_nohz_idle_exit+0x114/0x180
<4>[  348.422947] RSP: 0018:ffffc900000afed0 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10
<4>[  348.422973] RAX: ffff88040d5a8040 RBX: ffff88040d5a8040 RCX: 0000000000000001
<4>[  348.422994] RDX: 0000000000000000 RSI: ffffffff81d0ddbc RDI: ffffffff81cc1bee
<4>[  348.423015] RBP: ffffc900000afed8 R08: 0000000000000000 R09: 0000000000000001
<4>[  348.423036] R10: 0000000000000000 R11: 0000000000000000 R12: 0000004b38d4ed68
<4>[  348.423058] R13: ffff88040d5a8040 R14: 0000000000000000 R15: 0000000000000000
<4>[  348.423084]  do_idle+0x13d/0x1e0
<4>[  348.423099]  cpu_startup_entry+0x1d/0x20
<4>[  348.423113]  start_secondary+0x11c/0x140
<4>[  348.423128]  secondary_startup_64+0xa5/0xa5
<0>[  348.423382] Kernel Offset: disabled