Exactly. I was referring to that bit at the end of the article:

"In the case of Java volatiles, part of the solution is to force all reads/writes to bypass the local registers, and immediately trigger cache reads/writes instead. As soon as the data is read/written to the L1 cache, the hardware-coherency protocol takes over and provides guaranteed coherency across all global threads. Thus ensuring that if multiple threads are reading/writing to the same variable, they are all kept in sync with one another. And this is how you can achieve inter-thread coordination in as little as 1ns."