I haven't been able to read the article either but, from teasing apart the /. comments, it appears that they are extensions to the normal debugging support and

I haven't been able to read the article either but, from teasing apart the /. comments, it appears that they are extensions to the normal debugging support and aren't an immediate cause for concern. (If it's just a way to trigger a breakpoint based on the contents of a write, then that's only a subset of the documented capability.)