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    SubjectRe: [RFD] Automatic suspend
    On Tue, Feb 17, 2009 at 06:14:34AM -0800, Brian Swetland wrote:
    > [Matthew Garrett <mjg59@srcf.ucam.org>]
    > > https://lists.linux-foundation.org/pipermail/linux-pm/2009-January/019493.html
    > > says that they're the same on their current platform.
    >
    > Well on the Qualcomm MSM72xx SoCs, yeah they're pretty similar -- we can
    > reasonably enter power collapse (full shutdown of the ARM11 and
    > peripherals) from idle. But this is not (to my knowledge) true of *all*
    > SoCs out there. Also, resuming from this state can take 5-30ms
    > (depending on how distracted the baseband processor is by what's going
    > on on the network).

    Mm. Resume from deep idle on x86 is typically in the usec range, but
    this is the kind of constraint that pm_qos exposes nicely.

    --
    Matthew Garrett | mjg59@srcf.ucam.org


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