https://intel-gfx-ci.01.org/tree/drm-tip/IGT_4235/shard-hsw4/igt@gem_eio@suspend.html

pstore:
<0>[16871.728822] watchdog: BUG: soft lockup - CPU#3 stuck for 23s! [systemd-udevd:249]
<4>[16871.728834] Modules linked in: snd_hda_intel i915 vgem snd_hda_codec_hdmi x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_realtek snd_hda_codec_generic coretemp crct10dif_pclmul crc32_pclmul snd_hda_codec ghash_clmulni_intel snd_hwdep snd_hda_core snd_pcm mei_me mei r8169 prime_numbers mii lpc_ich [last unloaded: i915]
<4>[16871.728855] irq event stamp: 7097191
<4>[16871.728858] hardirqs last  enabled at (7097190): [<00000000eaa6a570>] restore_regs_and_return_to_kernel+0x0/0x1f
<4>[16871.728860] hardirqs last disabled at (7097191): [<000000007c552e58>] apic_timer_interrupt+0x9a/0xb0
<4>[16871.728862] softirqs last  enabled at (1667214): [<00000000acb7ae14>] __do_softirq+0x3a1/0x4aa
<4>[16871.728865] softirqs last disabled at (1667911): [<00000000f98a9254>] irq_exit+0xa4/0xb0
<4>[16871.728867] CPU: 3 PID: 249 Comm: systemd-udevd Tainted: G     U  W        4.15.0-CI-CI_DRM_3751+ #1
<4>[16871.728868] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12 02/15/2016
<4>[16871.728870] RIP: 0010:__do_softirq+0x9f/0x4aa
<4>[16871.728871] RSP: 0018:ffff88041fac3f70 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff11
<4>[16871.728872] RAX: 00000000ffffffff RBX: ffff88040a710040 RCX: 0000000000000000
<4>[16871.728873] RDX: 0000000000000000 RSI: ffffffff821087a9 RDI: ffffffff820b9a76
<4>[16871.728874] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
<4>[16871.728875] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88040a710040
<4>[16871.728876] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
<4>[16871.728877] FS:  00007f180bc908c0(0000) GS:ffff88041fac0000(0000) knlGS:0000000000000000
<4>[16871.728878] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[16871.728879] CR2: 00005557e5399ea8 CR3: 0000000409b0a005 CR4: 00000000001606e0
<4>[16871.728880] Call Trace:
<4>[16871.728881]  <IRQ>
<4>[16871.728885]  irq_exit+0xa4/0xb0
<4>[16871.728886]  smp_apic_timer_interrupt+0x90/0x2d0
<4>[16871.728888]  apic_timer_interrupt+0x9f/0xb0
<4>[16871.728889]  </IRQ>
<4>[16871.728891] RIP: 0010:put_timespec64+0x4/0x40
<4>[16871.728892] RSP: 0018:ffffc90000353f00 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11
<4>[16871.728894] RAX: 0000000000000000 RBX: 00007ffe4cc91120 RCX: 00000f93b0c04600
<4>[16871.728895] RDX: 00000000388e552b RSI: 00007ffe4cc91120 RDI: ffffc90000353f18
<4>[16871.728895] RBP: 00000000000000e4 R08: 0000000000000001 R09: 0000000000000001
<4>[16871.728896] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88040a710040
<4>[16871.728897] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
<4>[16871.728903]  SyS_clock_gettime+0x46/0x80
<4>[16871.728905]  do_syscall_64+0x59/0x1a0
<4>[16871.728907]  entry_SYSCALL64_slow_path+0x25/0x25
<4>[16871.728908] RIP: 0033:0x7ffe4cd07a20
<4>[16871.728909] RSP: 002b:00007ffe4cc910f0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e4
<4>[16871.728910] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007ffe4cd07a20
<4>[16871.728911] RDX: 0000000000000000 RSI: 00007ffe4cc91120 RDI: 0000000000000007
<4>[16871.728912] RBP: 00007ffe4cc910f0 R08: 0013a31497345980 R09: 00007ffe4cd04080
<4>[16871.728913] R10: 00000000006bd85e R11: 0000000000000202 R12: 00007ffe4cc91150
<4>[16871.728914] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
<4>[16871.728918] Code: 9c 08 00 00 01 c7 44 24 24 0a 00 00 00 48 89 44 24 18 48 c7 c0 80 0a 02 00 65 c7 00 00 00 00 00 e8 57 6d 4d ff fb b8 ff ff ff ff <48> c7 44 24 08 00 51 20 82 0f bc 04 24 83 c0 01 89 44 24 04 75 
<0>[16871.728965] Kernel panic - not syncing: softlockup: hung tasks
<4>[16871.728974] CPU: 3 PID: 249 Comm: systemd-udevd Tainted: G     U  W    L   4.15.0-CI-CI_DRM_3751+ #1
<4>[16871.728985] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12 02/15/2016
<4>[16871.728995] Call Trace:
<4>[16871.728999]  <IRQ>
<4>[16871.729003]  dump_stack+0x5f/0x86
<4>[16871.729009]  panic+0xcf/0x20d
<4>[16871.729017]  watchdog_timer_fn+0x278/0x280
<4>[16871.729024]  ? watchdog+0x30/0x30
<4>[16871.729030]  __hrtimer_run_queues+0xdf/0x4d0
<4>[16871.729038]  hrtimer_interrupt+0xb6/0x220
<4>[16871.729047]  smp_apic_timer_interrupt+0x6f/0x2d0
<4>[16871.729054]  apic_timer_interrupt+0x9f/0xb0
<4>[16871.729060] RIP: 0010:__do_softirq+0x9f/0x4aa
<4>[16871.729066] RSP: 0018:ffff88041fac3f70 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff11
<4>[16871.729077] RAX: 00000000ffffffff RBX: ffff88040a710040 RCX: 0000000000000000
<4>[16871.729087] RDX: 0000000000000000 RSI: ffffffff821087a9 RDI: ffffffff820b9a76
<4>[16871.729096] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
<4>[16871.729105] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88040a710040
<4>[16871.729114] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
<4>[16871.729129]  irq_exit+0xa4/0xb0
<4>[16871.729135]  smp_apic_timer_interrupt+0x90/0x2d0
<4>[16871.729142]  apic_timer_interrupt+0x9f/0xb0
<4>[16871.729148]  </IRQ>
<4>[16871.729152] RIP: 0010:put_timespec64+0x4/0x40
<4>[16871.729158] RSP: 0018:ffffc90000353f00 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11
<4>[16871.729169] RAX: 0000000000000000 RBX: 00007ffe4cc91120 RCX: 00000f93b0c04600
<4>[16871.729178] RDX: 00000000388e552b RSI: 00007ffe4cc91120 RDI: ffffc90000353f18
<4>[16871.729187] RBP: 00000000000000e4 R08: 0000000000000001 R09: 0000000000000001
<4>[16871.729196] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88040a710040
<4>[16871.729205] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
<4>[16871.729218]  SyS_clock_gettime+0x46/0x80
<4>[16871.729225]  do_syscall_64+0x59/0x1a0
<4>[16871.729231]  entry_SYSCALL64_slow_path+0x25/0x25
<4>[16871.729237] RIP: 0033:0x7ffe4cd07a20
<4>[16871.729243] RSP: 002b:00007ffe4cc910f0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e4
<4>[16871.729253] RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007ffe4cd07a20
<4>[16871.729263] RDX: 0000000000000000 RSI: 00007ffe4cc91120 RDI: 0000000000000007
<4>[16871.729272] RBP: 00007ffe4cc910f0 R08: 0013a31497345980 R09: 00007ffe4cd04080
<4>[16871.729281] R10: 00000000006bd85e R11: 0000000000000202 R12: 00007ffe4cc91150
<4>[16871.729290] R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000000
<0>[16871.729332] Dumping ftrace buffer:
<0>[16871.729391]    (ftrace buffer empty)
<0>[16871.729398] Kernel Offset: disabled