These files show up in /proc/sys/debug/, depending on the
kernel configuration:
This flag controls whether the kernel prints information about unhandled
signals (like segmentation faults) to the kernel log (dmesg).
0: Unhandled signals are not traced.1: Information about unhandled signals is printed.
The default value is 1 on most architectures (like x86, MIPS, RISC-V),
but it is 0 on arm64.
The actual information printed and the context provided varies significantly depending on the CPU architecture. For example:
- On x86, it typically prints the instruction pointer (IP), error code, and address that caused a page fault.
- On PowerPC, it may print the next instruction pointer (NIP), link register (LR), and other relevant registers.
When enabled, this feature is often rate-limited to prevent the kernel log from being flooded during a crash loop.
This flag enables or disables the optimization of Kprobes on certain architectures (like x86).
0: Kprobes optimization is turned off.1: Kprobes optimization is turned on (default).
For more details on Kprobes and its optimization, please refer to Documentation/trace/kprobes.rst.
Copyright (c) 2026, Shubham Chakraborty <chakrabortyshubham66@gmail.com>
For general info and legal blurb, please look in Documentation/admin-guide/sysctl/index.rst.