On Wed, Dec 06, 2017 at 03:51:44PM +1100, Michael Ellerman wrote: > Cyril Hrubis <chrubis@xxxxxxx> writes: > > > Hi! > >> > MAP_FIXED_UNIQUE > >> > MAP_FIXED_ONCE > >> > MAP_FIXED_FRESH > >> > >> Well, I can open a poll for the best name, but none of those you are > >> proposing sound much better to me. Yeah, naming sucks... > > > > Given that MAP_FIXED replaces the previous mapping MAP_FIXED_NOREPLACE > > would probably be a best fit. > > Yeah that could work. > > I prefer "no clobber" as I just suggested, because the existing > MAP_FIXED doesn't politely "replace" a mapping, it destroys the current > one - which you or another thread may be using - and clobbers it with > the new one. It's longer than MAP_FIXED_WEAK :-P You'd have to be pretty darn strong to clobber an existing mapping.
