Huge page size support in for mmap - MAP_HUGE_2MB, MAP_HUGE_1GB

[GuillaumeDIDIER]

Related to nix-rust/nix#1194

Since linux 3.8 there are additional flags to mmap that allow specifying what size of huge page should be used. (MAP_HUGE_2MB, MAP_HUGE_1GB on x86_64, the headers appears to have some generic support for variety of other sizes for other architectures)

http://man7.org/linux/man-pages/man2/mmap.2.html

target triple eight be x86_64-unknown-linux-gnu ?

Can those be added to libc ?

(I'd be willing to help, but I wouldn't mind some guidance on how to best tackle this and whether this is appropriate.)

[GuillaumeDIDIER]

https://github.com/torvalds/linux/blob/master/include/uapi/linux/mman.h this is where those are defined.
They are no arch specific override (unlike MAP_HUGTELB), hence this can probably go at linux_like/linux/mod.rs