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    SubjectRe: [patch] jiffies wraparound [Re: 2.1.125 Show stopper list: Draft]


    On Tue, 27 Oct 1998, MOLNAR Ingo wrote:

    > But it would be a neat feature nevertheless, unfortunately exporting 4MB
    > pages to ring 3 user-space doesnt seem to work (i've tried), only ring 0
    > is supposed to see those mappings.

    The VM layer currently gets confused if it sees a 4MB page.

    I actually had 4MB pages working at one point (with magic hackery to the
    pmd_xxx macros - no generic VM changes necessary), but it became fairly
    ugly, and the generated code was nasty for the normal case of 4kB pages.

    Linus


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