> the advisory locks were owned by individual threads. Eventually (probably after the change to NPTL and improved kernel support for threads) Isn't that becaus

> the advisory locks were owned by individual threads. Eventually (probably after the change to NPTL and improved kernel support for threads) Isn't that because, in the time prior to that "improved kernel support", threads were really processes, and it was once they became full-fledge (i.e. fully lightweight) threads that they lost the ability to own the advisory locks? Or am I misremembering?