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    SubjectRe: TLB entries > 4kb

    On Thu, 12 Feb 1998, Alan Cox wrote:

    > > Has anybody ever looked into implementing that? What architectures besides
    > > MIPS could take advantage of such a feature?
    >
    > On the intel its a huge win to map PCI frame buffers using 4Mbyte pages, but
    > the kernel mmap really can't hack the idea right now. A pity cos if you
    > hack it in and make sure you never unmap it you get 2-3% better X performance

    i tried to hack this half a year ago, but had to find out that 4MB pages
    are only valid for kernel mappings, which means we'd have to make X a ring
    0 process too ...

    -- mingo


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