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    SubjectRe: [PATCH 2.5.43-mm2] New shared page table patch
    Benjamin LaHaise wrote:
    >
    > On Tue, Oct 22, 2002 at 10:36:40AM -0700, Martin J. Bligh wrote:
    > > Bear in mind that large pages are neither swap backed or file backed
    > > (vetoed by Linus), for starters. There are other large app problem scenarios
    > > apart from Oracle ;-)
    >
    > I think the fact that large page support doesn't support mmap for users
    > that need it is utterly appauling; there are numerous places where it is
    > needed. The requirement for root-only access makes it useless for most
    > people, especially in HPC environments where it is most needed as such
    > machines are usually shared and accounts are non-priveledged.
    >

    Have you reviewed the hugetlbfs and hugetlbpage-backed-shm patches?

    That code is still requiring CAP_IPC_LOCK, although I suspect it
    would be better to allow hugetlbfs mmap to be purely administered
    by file permissions.
    -
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