Hi List, I was experimenting with the latest version of systemtap's facility for debugging userspace applications, for that the kernel must be compiled with CONFIG_UTRACE=y option. Looks like the original source path (http://people.redhat.com/roland/utrace/) is no longer available. The description about utrace can be found at http://lwn.net/Articles/224772/ Any idea about its current status. Is it discontinued? TIA -- Thanks Sudheer