[namibj]

Nah, usually can't have huge pages. Almost certainly can't have giant pages. Can't even fit all L3$ capacity into the L2 TLB if done via 4k pages...

[nixon_why69]

I hadn't thought of that but apparently Linux at least has had support for a while, according to manpage? https://man7.org/linux/man-pages/man2/mmap.2.html

[namibj]

mmap is also for non-disk-backed memory:

Your link refers to https://www.kernel.org/doc/Documentation/admin-guide/mm/huge... ,

which contains this tidbit:

> If the user applications are going to request huge pages using mmap system call, then it is required that system administrator mount a file system of type hugetlbfs::

Note this otherwise has semantics similar to tmpfs; notably, it's usage is mutually exclusive with being able to supply a disk file fd to mmap!