Re: [PATCH] hugetlb: unshare some PMDs when splitting VMAs

[James Houghton]

> I think I've come up with one... :) It only took many many hours of
> staring at code to come up with:
>
> 1. Fault in PUD_SIZE-aligned hugetlb mapping
> 2. fork() (to actually share the PMDs)

Erm, I mean: mmap(), then fork(), then fault in both processes.