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    SubjectRe: [linux-pm] [PATCH 0/8] Suspend block api (version 8)
    On Wed, 2 Jun 2010, Arve Hjønnevåg wrote:
    > 2010/6/2 Thomas Gleixner <tglx@linutronix.de>:
    > > On Tue, 1 Jun 2010, Arve Hjønnevåg wrote:
    > >>
    > >> Because suspend itself causes you to not be idle you cannot abort
    > >> suspend just because you are not idle anymore.
    > >
    > > You still are addicted to the current suspend mechanism. :)
    > >
    >
    > No I want you to stop confusing low power idle modes with suspend. I
    > know how to enter low power modes from idle if that low power mode is
    > not too disruptive.

    What prevents us from going into a disruptive mode from idle ? I don't
    see a reason - except crappy ACPI stuff, which I'm happy to ignore.

    > > If I understood you correctly then you can shutdown the CPU in idle
    > > completelty already, but that's not enough due to:
    > >
    > >    1) crappy applications keeping the cpu away from idle
    > >    2) timers firing
    > >
    > > Would solving those two issues be sufficient for you or am I missing
    > > something ?
    >
    > Solving those two is enough for current android phones, but it may not
    > be enough for other android devices.

    In which way ? May not be enough is a pretty vague statement.

    > 1 is not solvable (meaning we cannot fix all apps),

    We can mitigate it with cgroups and confine crap there, i.e. force
    idle them.

    > and 2 is difficult to fix since the periodic
    > work is useful while the device is actually in use. One possible way
    > to solve 2 is to allow timers on a not-idle clock.

    That's what I had in mind.

    > Unrelated to Android, I also want to use opportunistic suspend on my
    > desktop.

    I expect that intel/amd fixing their stuff is going to happen way
    before we sprinkled suspend blockers over a full featured desktop
    distro.

    Thanks,

    tglx
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