There's a new mmap option MAP_FIXED_NOREPLACE added in the Linux 4.17 kernel.
This will check if the requested mapping overlaps any existing maps and fail
if so, allowing fixed address mappings to be used more safely. Funny to see
since we already worked around this danger in LMDB a long time ago.
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a4ff8e8620d3f4f50ac4b41e8067b7d395056843
As usual, adding more stuff to the kernel even though userland solutions
already existed.
--
-- Howard Chu
CTO, Symas Corp. http://www.symas.com
Director, Highland Sun http://highlandsun.com/hyc/
Chief Architect, OpenLDAP http://www.openldap.org/project/
