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    SubjectRe: [linux-pm] [PATCH 0/8] Suspend block api (version 8)
    On Thu, 27 May 2010, Matthew Garrett wrote:

    > On Thu, May 27, 2010 at 06:49:18PM +0100, Alan Cox wrote:
    > > > ACPI provides no guarantees about what level of hardware functionality
    > > > remains during S3. You don't have any useful ability to determine which
    > > > events will generate wakeups. And from a purely practical point of view,
    > > > since the latency is in the range of seconds, you'll never have a low
    > > > enough wakeup rate to hit it.
    > >
    > > So PCs with current ACPI don't get opportunistic suspend capability. It
    > > probably won't be supported on the Commodore Amiga either - your point ?
    >
    > Actually, the reverse - there's no terribly good way to make PCs work
    > with scheduler-based suspend, but there's no reason why they wouldn't
    > work with the current opportunistic suspend implementation.

    How does that solve the problems you mentioned above ? Wakeup
    guarantees, latencies ...

    It's not a prove of the technical correctness of the approach if it
    can provide a useless functionality.

    Thanks,

    tglx


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