Purpose
It is a simple to use RAM-based file system specially designed for debugging purposes. debugfs exists as a simple way for kernel developers to make information available to user space.
Unlike /proc, which is only meant for information about a process, or sysfs, which has strict one-value-per-file rules, debugfs has no rules at all. Developers can put any information they want there.
Read more about this topic: Debugfs
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