to me at least, hazard pointers and rcu seems to be the major changes, for library authors anyways. i would actually wager that rcu in and of itself is almost

to me at least, hazard pointers and rcu seems to be the major changes, for library authors anyways. i would actually wager that rcu in and of itself is almost at par with atomics and the memory-model :o) for folks wondering about 'hazard-pointers' this paper https://web.archive.org/web/20171104135736/http://www.research.ibm.com/people/m/michael/ieeetpds-2004.pdf https://web.archive.org/web/20171104135736/http://www.resear... is quite useful as an excellent starting point.