CONFIGDEBUGFS

CONFIGDEBUGFS is a configuration option in the Linux kernel that enables the debug filesystem (debugfs). Debugfs is a virtual filesystem that provides an interface to kernel-internal data structures and debugging information. It is primarily used by developers and system administrators for debugging and performance tuning purposes. When CONFIGDEBUGFS is enabled, the debugfs filesystem is mounted at /sys/kernel/debug, allowing access to various debug files and directories. These files and directories can provide insights into kernel internals, such as memory usage, CPU usage, and other system metrics. However, enabling debugfs can expose sensitive information and may have a performance impact, so it is typically used in development and testing environments rather than in production systems. The option is found in the kernel configuration menu under "Filesystems" and can be enabled or disabled as needed.