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    SubjectRe: [linux-pm] [suspend/resume] Re: userspace notification from module
    Date
    On Tuesday 05 January 2010, Bartłomiej Zimoń wrote:
    > Dnia 5 stycznia 2010 10:07 Anders Eriksson <aeriksson@fastmail.fm> napisał(a):
    > >
    > > rjw@sisk.pl said:
    > > >> > I don't see a problem with this in principle, although I don't think signals
    > > >> > are very suitable for this particular purpose, because you need two-way
    > > >> > communication between the power manager and the processes it's going to
    > > >> > notify (because it has to wait for the processes to finish their preparations
    > > >> > and to tell it that they are ready).
    > >
    > > Wouldn't there need to be dependecy tracking for the userspace processes? A
    > > process couldn't signal "done" until it know there's no more work to do, which
    > > requires all other processes to finish up first.
    > >
    >
    > Not all processes will need pm notification.
    >
    > Just in case, could this "power manager" be provided as userspace
    > driver for kernel (for example compiled as UIO)?

    I don't really understand why you want to do that in the kernel. Is there
    any particular reason why this cannot be done in the user space?

    Rafael
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