From: Michael Ellerman
> Sent: 08 December 2017 11:08
...
> If we had a time machine, the right set of flags would be:
>
> - MAP_FIXED: don't treat addr as a hint, fail if addr is not free
> - MAP_REPLACE: replace an existing mapping (or force or clobber)
>
> But the two were conflated for some reason in the current MAP_FIXED.
Possibly because the original use was loading overlays?
> Given we can't go back and fix it, the closest we can get is to add a
> variant of MAP_FIXED which subtracts the "REPLACE" semantic.
>
> ie: MAP_FIXED_NOREPLACE
Much better than _SAFE - which is always bad because it is usually
one 'safe' for one specific use case.
David
