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    SubjectRe: linux interrupt handling problem

    On Tue, 9 Nov 1999, Linus Torvalds wrote:

    > That is in fact what Linux/SMP does in various situations: a "sti()" in an
    > interrupt handler on SMP/i386 will be just a "local" sti(), while ir in
    > normal situations will be a "global" sti().

    That's the software version of priorities, on m68k this can be realized in
    hardware with 7 levels, but we can't use it if everyone is allowed to play
    with the interrupt mask.

    bye, Roman

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