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    SubjectRe: [linux-pm] [PATCH 0/8] Suspend block api (version 6)
    On Thu, 13 May 2010, Tony Lindgren wrote:

    > > > And that's why
    > > > it should be handled by runtime power management instead.
    > >
    > > Runtime PM is not capable of freezing userspace and shutting down CPUs.
    > > More or less by definition -- if it could then it wouldn't be "runtime"
    > > any more, since the processor wouldn't be running.
    > Not true. We are already powering off CPUs and rebooting them for
    > at least omaps in every idle loop using cpuidle. The memory stays on.

    Okay, that's a valid point. But is that approach usable in general
    (i.e., on non-OMAP systems)?

    How do you handle situations where the CPU is currently idle but an
    event (such as I/O completion) is expected to occur in the near future?
    You don't want to power-off and reboot then, do you?

    Alan Stern

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