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
