igt@perf_pmu@cpu-hotplug - INFO: task systemd-udevd:\d+ blocked for more than 61 seconds.
https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_7547/shard-apl8/igt@perf_pmu@cpu-hotplug.html
<6> [432.308256] [IGT] perf_pmu: starting subtest cpu-hotplug
<6> [432.386142] smpboot: CPU 0 is now offline
<6> [433.399368] smpboot: Booting Node 0 Processor 0 APIC 0x0
<6> [433.455026] smpboot: CPU 1 is now offline
<6> [434.465200] x86: Booting SMP configuration:
<6> [434.465220] smpboot: Booting Node 0 Processor 1 APIC 0x2
<6> [434.498227] smpboot: CPU 2 is now offline
<6> [435.509088] smpboot: Booting Node 0 Processor 2 APIC 0x4
<6> [435.542720] smpboot: CPU 3 is now offline
<6> [436.551084] smpboot: Booting Node 0 Processor 3 APIC 0x6
<6> [436.852644] [IGT] perf_pmu: exiting, ret=0
<5> [436.853549] Setting dangerous option reset - tainting kernel
<5> [436.854829] Setting dangerous option reset - tainting kernel
<6> [436.862140] Console: switching to colour frame buffer device 240x67
<3> [494.332540] INFO: task systemd-udevd:307 blocked for more than 61 seconds.
<3> [494.334330] Tainted: G U W 5.5.0-rc1-CI-CI_DRM_7547+ #1
<3> [494.334652] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
<6> [494.334892] systemd-udevd D12600 307 1 0x00004100
<4> [494.334917] Call Trace:
<4> [494.334951] ? __schedule+0x2e5/0x810
<4> [494.334979] ? bit_wait+0x50/0x50
<4> [494.334994] schedule+0x37/0xe0
<4> [494.335008] io_schedule+0xd/0x30
<4> [494.335022] bit_wait_io+0x8/0x50
<4> [494.335036] __wait_on_bit+0x27/0x90
<4> [494.335058] out_of_line_wait_on_bit+0x8c/0xb0
<4> [494.335079] ? init_wait_var_entry+0x40/0x40
<4> [494.335099] __ext4_find_entry+0x164/0x400
<4> [494.335132] ? d_alloc_parallel+0x38f/0xa00
<4> [494.335158] ext4_lookup+0x74/0x1f0
<4> [494.335192] __lookup_slow+0xfc/0x1d0
<4> [494.335247] lookup_slow+0x30/0x50
<4> [494.335266] walk_component+0x1bf/0x2f0
<4> [494.335278] ? generic_permission+0x18/0x1c0
<4> [494.335307] link_path_walk.part.56+0x2ee/0x540
<4> [494.335322] ? path_init+0x3d5/0x4f0
<4> [494.335349] path_lookupat+0x90/0x200
<4> [494.335363] ? getname_flags+0x2d/0x170
<4> [494.335458] filename_lookup+0xb1/0x140
<4> [494.335494] ? getname_flags+0x2d/0x170
<4> [494.335513] ? rcu_read_lock_sched_held+0x4d/0x80
<4> [494.335527] ? getname_flags+0x2d/0x170
<4> [494.335544] ? kmem_cache_alloc+0x27b/0x2a0
<4> [494.335569] ? getname_flags+0x49/0x170
<4> [494.335598] ? vfs_statx+0x6e/0xd0
<4> [494.335612] vfs_statx+0x6e/0xd0
<4> [494.335642] __do_sys_newstat+0x39/0x70
<4> [494.335663] ? syscall_trace_enter+0xbc/0x300
<4> [494.335695] do_syscall_64+0x4f/0x220
<4> [494.335711] entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [494.335723] RIP: 0033:0x7f17dac2c775
<4> [494.335744] Code: Bad RIP value.
<4> [494.335755] RSP: 002b:00007ffda5f2f0e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000004
<4> [494.335768] RAX: ffffffffffffffda RBX: 00005593b3023d60 RCX: 00007f17dac2c775
<4> [494.335780] RDX: 00007ffda5f2f0f0 RSI: 00007ffda5f2f0f0 RDI: 00005593b3023d60
<4> [494.335791] RBP: 00007ffda5f2f0f0 R08: 0005886fa083f33e R09: 0000000000000000
<4> [494.335802] R10: 0000000000000000 R11: 0000000000000246 R12: 00005593b5207f70
<4> [494.335813] R13: 00000000fffffffe R14: 0000000000000000 R15: 00005593b5207e90
<3> [494.335881] INFO: task igt_runner:1050 blocked for more than 61 seconds.
<3> [494.336092] Tainted: G U W 5.5.0-rc1-CI-CI_DRM_7547+ #1
<3> [494.336300] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
<6> [494.336616] igt_runner D12600 1050 1046 0x00004000
````