Re: [patch] remove hugetlb syscalls

David Mosberger-Tang
2002-11-14T21:24:28Z

>>>>> On Thu, 14 Nov 2002 12:34:11 -0800, William Lee Irwin III <wli@holomorphy.com> said:

William> (3) ->f_op->mmap() will hand -EINVAL back to userspace
William> instead of automatically placing the vma, for explicit and
William> 0 start adresses

This sounds like a receipe for creating unportable programs because
the alignment constraints will be different from one platform to
another. (Adding gethugepagesize() in libc would alleviate the
problem but it wouldn't solve it completely.)

Overall, it does sound to me that the hugetlbfs is so specialized that
it would be much cleaner to provide a separate interface at the
user-level. That would leave more flexibility should the
implementation change over time (which it well might).

--david