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    SubjectRe: [PATCH] CPU hot swap for 2.4.3 + s390 support
    On Sun, 6 May 2001, Chris Wedgwood wrote:
    > On Sat, May 05, 2001 at 11:19:09PM -0300, Rik van Riel wrote:
    >
    > This only leaves two issues, the first is device drivers and the
    > second is the question whether we'd want the overhead needed to
    > implement the (fairly easy) memory relocation.
    >
    > How do you relocate
    >
    > -- pages which are mlocked without violating RT contraints?

    Fuck RT constraints. Linux doesn't have infinitely small
    scheduling latencies, it's easy to copy a page without
    increasing the scheduling latencies much.

    > -- pages which contain kernel pointers and might be accessed from
    > interrupt context?

    Block interrupts while copying a kernel page?


    Remember that this is an emergency situation, so it's ok
    to use "big hammer" solutions.

    regards,

    Rik
    --
    Virtual memory is like a game you can't win;
    However, without VM there's truly nothing to lose...

    http://www.surriel.com/ http://distro.conectiva.com/

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