debugfs is a special file system available in the Linux kernel since version 2.6.10-rc3.Linux: DebugFS , by Jeremy, December 11, 2004, KernelTrap. (Announcement of debugfs by Greg KH.) It was written by Greg Kroah-Hartman.
debugfs is a simple-to-use RAM-based file system specially designed for debugging purposes. It exists as a simple way for kernel developers to make information available to user space.Linux Kernel Documentation :: filesystems : debugfs.txt documentation from the source code (Based on kernel version 2.6.35.4. Page generated on 2010-09-02 21:39 EST.) Unlike , 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.An updated guide to debugfs, By Jonathan Corbet, May 25, 2009, LWN
Use To compile a Linux kernel with the debugfs facility, the option must be set to yes. It is typically mounted at with a command such as:2.5 Debugfs A guide to using debugfs, Ariane Keller, Version 0.8, July 2008, Kernel Space - User Space Interfaces
mount -t debugfs none /sys/kernel/debug
It can be manipulated using several calls from the C header file , which include: for creating a file in the debug filesystem. for creating a directory inside the debug filesystem. for creating a symbolic link inside the debug filesystem. for removing a debugfs entry from the debug filesystem.
References
External links An updated guide to debugfs at LWN