I read about this sleeping spin lock: http://lwn.net/Articles/271817/ What is that? I don't quite understand. Normal spin lock is poll-based, but sleeping spin lock is not, then how does it differed from mutex then? Thank you for the answer :-). -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ