> >>  If you don't get the question you are not an OS person, > >> if you are, of course you get it. > > Hmm. Am I expected to understand this? Seriously, I don't know how > many people really wrote anything like swtch (). You'd be amazed at how many people did their own user level threads. Gotta write swtch() for that. And it's not swtch() so much as do you understand the stack frames? If you could look at the stack frames and give me a stack trace that's more or less the same thing. -- --- Larry McVoy lm at bitmover.com http://www.bitkeeper.com