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    SubjectRe: Problem with 1G RAM

    On Fri, 4 Dec 1998, David S. Miller wrote:

    > From: Perry Harrington <>
    > Date: Fri, 4 Dec 1998 14:58:51 -0800 (PST)
    > Does any of this make sense? Or am I just off my rocker? I thought
    > of dynamicising PAGE_OFFSET for x86, but I figured that Linus, et
    > al, would have a fit over performance.
    > Look at the BTFIXUP stuff we do on sparc32 to see another idea of how
    > to taper off most of the performance problems assosciated with a
    > dynamic PAGE_OFFSET. (TASK_UNMAPPED_BASE was a real killer before we
    > added the BTFIXUP stuff, it put a divide into a critical path).

    the problem with this is that x86 CISC instructions are inherently more
    difficult to fix up runtime :(

    -- mingo

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