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    SubjectRe: don't let mmap allocate down to zero
    On Wed, Jan 26, 2005 at 09:09:27PM -0800, William Lee Irwin III wrote:
    >> There's a long discussion here, in which no one appears to have noticed
    >> that SHLIB_BASE does not exist in mainline. Is anyone else awake here?

    On Thu, Jan 27, 2005 at 12:18:56AM -0500, Dave Jones wrote:
    > It's an exec-shield'ism. Rik likely was working off a Red Hat/Fedora
    > kernel tree.

    It does change things in a substantial way. Namely, the lower address
    space boundary doesn't exist in mainline at all, and so its enforcement
    requires introduction. Furthermore, mainline must concern itself with
    all Linux-supported architectures (not distro-supported architectures),
    not just ia32/x86-64, so there is also FIRST_USER_PGD_NR to take into
    account as opposed to pulling magic ia32/x86-64 -specific numbers out
    of a hat and splattering them all over core code. Not that you had
    anything to do with any of this.

    -- wli
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