Re: [PATCH 0/2] mm: introduce MAP_FIXED_SAFE

[Michael Ellerman]

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.

cheers