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    SubjectRe: RCU question
    George Anzinger wrote:

    >
    > The "normal" idle loop just looks at the need_resched flag and goes
    > right back to the hlt,

    That's the problem: If a the tasklet does a wakeup then the reschedule
    is delayed until the next interrupt. Testing need_resched and executing
    hlt must be atomic, but it isn't - NMIs break the atomicity.
    Not a big deal, except if someone implements a tickless kernel. I think
    we can ignore it for now [or was the thread started by someone who
    want's to disable the hardware timer when the system is really idle?]

    --
    Manfred
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