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    SubjectRe: 'global' rq->clock

    On Sat, 2008-05-03 at 12:27 -0700, David Miller wrote:
    > > ( although please note that the growing generalization that goes on
    > > _did_ find a subtle nohz problem on sparc64 early in the merge
    > window,
    > > so it's not like these changes are totally useless to you. )
    > Note that this bug theoretically exists on every platform,
    > even x86, and only sparc64 is fixed at the moment by adding
    > the irq_{entry,exit}() guards around all of it's IPI handlers.

    What is the bug ?

    IPIs on power are normal interrupts, so they do happen in irq_entry/exit
    blocks but I'm curious to know what the root bug is :-)


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