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

    > On Thu, 2010-05-27 at 18:40 +0100, Matthew Garrett wrote:
    > > On Thu, May 27, 2010 at 07:34:40PM +0200, Peter Zijlstra wrote:
    > > > > we still need to be able to enter suspend while the system isn't idle.
    > > >
    > > > _WHY_!?
    > >
    > > Because if I'm running a kernel build in a tmpfs and I hit the sleep
    > > key, I need to go to sleep. Blocking processes on driver access isn't
    > > sufficient.
    > But that's a whole different issue. I agree that a forced suspend for
    > things like that make sense, just not for power managing a running
    > system.

    Why not? Or rather, why shouldn't it?

    > PC style hardware like that doesn't wake up from suspend for
    > funny things like a keypress either (good thing too).

    Yes it does. If I close the lid of my laptop, wait a few seconds for
    it to suspend, then open the lid (which does not wake it up), and hit a
    key -- it wakes up.

    > Anyway all that already works (more or less), so I don't see the
    > problem.

    The "less" part is the problem. It would be nice to have a forced
    suspend mode that is more dicriminating: Instead of activating
    immediately it would wait until all pending events were handled.

    Alan Stern

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