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hung_task_all_cpu_backtrace

file: /proc/sys/kernel/hung_task_all_cpu_backtrace
variable: kernel.hung_task_all_cpu_backtrace
Official reference

If this option is set, the kernel will send an NMI to all CPUs to dump their backtraces when a hung task is detected. This file shows up if CONFIG_DETECT_HUNG_TASK and CONFIG_SMP are enabled.

0: Won’t show all CPUs backtraces when a hung task is detected. This is the default behavior.

1: Will non-maskably interrupt all CPUs and dump their backtraces when a hung task is detected.

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Last update: 2026-03-30 12:00:00 UTC
Parsed kernel version 6.18 from git

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Updated by Ilya Vasilyev aka Nadz Goldman from Arviol ( vStack dep. ), ITG