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    SubjectRe: [PATCH 0/8] Suspend block api (version 8)
    On Wed, 26 May 2010 11:45:06 +0200
    Peter Zijlstra <peterz@infradead.org> wrote:

    > On Wed, 2010-05-26 at 02:41 -0700, Arve Hjønnevåg wrote:
    > > On Wed, May 26, 2010 at 1:47 AM, Peter Zijlstra <peterz@infradead.org> wrote:
    > > > On Tue, 2010-05-25 at 01:38 +0200, Rafael J. Wysocki wrote:
    > > >> > This of course will lead to a scattering of suspend blockers into any
    > > >> > drivers/subsystems considered "useful", which by looking through current
    > > >> > Android kernels is many of them.
    > > >>
    > > >> That depends on the maintainers of these subsystems, who still have the power
    > > >> to reject requested changes.
    > > >
    > > > So as a scheduler maintainer I'm going to merge a patch that does a
    > > > suspend_blocker when the runqueue's aren't empty... how about that?
    > > >
    > >
    > > I don't know if you are serious, since the all the runqueues are never
    > > empty while suspending, this would disable opportunistic suspend
    > > altogether.
    >
    > So why again was this such a great scheme? Go fix your userspace to not
    > not run when not needed.

    Hi Peter!

    This was already mentioned in one of these threads.

    The summary is: The device this kernel is running on dosn't want to
    (or can) rely on userspace to save power. This is because it is an open
    system, without an app-store or the like. Everyone can run what he
    wants.

    So anything relying on (all) userspace solves a different problem.

    Cheers,
    Flo




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