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CONFIG_PRINTK_INDEX: Printk indexing debugfs interface

General informations

The Linux kernel configuration item CONFIG_PRINTK_INDEX:

Help text

Add support for indexing of all printk formats known at compile time at <debugfs>/printk/index/<module>.

This can be used as part of maintaining daemons which monitor /dev/kmsg, as it permits auditing the printk formats present in a kernel, allowing detection of cases where monitored printks are changed or no longer present.

There is no additional runtime cost to printk with this enabled.

Hardware

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