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    SubjectRe: is killing zombies possible w/o a reboot?
    Russell Miller <> writes:

    > This brings up another question I've had since reading the documentation on
    > later pentium-class chips:
    > why are only rings 0 and 3 used in linux?

    Because the "traditional" Unix privilege model only has two levels,
    and Linux runs on many architectures, most of which have only two
    privilege levels (the 68000 called them "user" and "supervisor").
    Special-casing x86 is possible but probably wouldn't be worth it.

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