What does the STICKY_TIMEOUTS flag for personality(2) do?

Is there a good description of exactly what each of the flags you can pass to personality(2) does? I'm particularly interested in STICKY_TIMEOUTS, but a general detailed description of all of them would be nice. I've googled a bunch for this and can't find it. And I like knowing these things. This is a very specific programming question, but it's also very Unix/Linux specific. I wasn't sure if it should go here or on StackOverflow.