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SubjectRe: INFO: task systemd-udevd:94 blocked for more than 120 seconds.
On Fri, Sep 23, 2022 at 08:59:07PM +0200, Borislav Petkov wrote:
> Hi folks,
>
> I'm seeing the below on linux-next-20220923 and thermal_zone is in the
> stacktrace so I thought I should Cc relevant folks in case you have an
> idea...
>
> [ 155.065997] radeon 0000:00:01.0: [drm] fb0: radeondrmfb frame buffer device
> [ 155.152551] [drm] Initialized radeon 2.50.0 20080528 for 0000:00:01.0 on minor 0
> [ 242.946675] INFO: task systemd-udevd:94 blocked for more than 120 seconds.
> [ 242.946820] Not tainted 6.0.0-rc6-next-20220923 #1
> [ 242.946902] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 242.946995] task:systemd-udevd state:D stack:13344 pid:94 ppid:88 flags:0x00004004
> [ 242.947118] Call Trace:
> [ 242.947166] <TASK>
> [ 242.947216] __schedule+0x2af/0x830
> [ 242.947297] schedule+0x5d/0xc0
> [ 242.947360] schedule_preempt_disabled+0x14/0x30
> [ 242.947442] __mutex_lock.constprop.0+0x2d0/0x7b0
> [ 242.947524] thermal_zone_device_update.part.0+0xf8/0x2f0
> [ 242.947607] ? acpi_system_write_wakeup_device+0x170/0x170
> [ 242.947700] thermal_zone_device_set_mode+0x75/0xb0
> [ 242.947781] acpi_thermal_add+0x3c2/0x400 [thermal]
> [ 242.947881] acpi_device_probe+0x56/0x110
> [ 242.947953] really_probe+0xc7/0x280
> [ 242.948022] ? pm_runtime_barrier+0x61/0xb0
> [ 242.948098] __driver_probe_device+0x71/0xd0
> [ 242.948175] driver_probe_device+0x2d/0x100
> [ 242.948245] __driver_attach+0xa6/0x1a0
> [ 242.950659] ? __device_attach_driver+0x110/0x110
> [ 242.953030] bus_for_each_dev+0x69/0xa0
> [ 242.955433] bus_add_driver+0x1b0/0x200
> [ 242.957806] ? _raw_spin_unlock+0x12/0x40
> [ 242.959211] driver_register+0x89/0xe0
> [ 242.960589] ? 0xffffffffa0006000
> [ 242.961957] acpi_thermal_init+0x5c/0x1000 [thermal]
> [ 242.963375] do_one_initcall+0x4d/0x210
> [ 242.964756] ? kmalloc_trace+0x38/0xc0
> [ 242.966130] do_init_module+0x4a/0x1e0
> [ 242.967503] __do_sys_finit_module+0xa7/0x100
> [ 242.968858] do_syscall_64+0x42/0x90
> [ 242.970202] entry_SYSCALL_64_after_hwframe+0x63/0xcd
> [ 242.971561] RIP: 0033:0x7fd31c8189b9
> [ 242.972910] RSP: 002b:00007ffd203a81b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
> [ 242.974318] RAX: ffffffffffffffda RBX: 00005571cdddfb30 RCX: 00007fd31c8189b9
> [ 242.975720] RDX: 0000000000000000 RSI: 00007fd31c9a3e2d RDI: 0000000000000005
> [ 242.977089] RBP: 0000000000020000 R08: 0000000000000000 R09: 00005571cddc6f50
> [ 242.978449] R10: 0000000000000005 R11: 0000000000000246 R12: 00007fd31c9a3e2d
> [ 242.979792] R13: 0000000000000000 R14: 00005571cddd8170 R15: 00005571cdddfb30
> [ 242.981143] </TASK>

I have not seen a stacktrace like this on my machines (although I
suspect that is because I don't have CONFIG_DETECT_HUNG_TASK enabled in
my configs) but my Honeycomb LX2 hangs while booting after commit
78ffa3e58d93 ("thermal/core: Add a generic thermal_zone_get_trip()
function") according to my bisect, which certainly seems like it could
be related to the trace you are seeing.

Cheers,
Nathan

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