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SubjectRe: [linux-pm] [PATCH 0/8] Suspend block api (version 6)
On Thu, May 13, 2010 at 01:23:20PM -0700, Tony Lindgren wrote:
> * Matthew Garrett <mjg@redhat.com> [100513 13:03]:
> > On Thu, May 13, 2010 at 01:00:04PM -0700, Tony Lindgren wrote:
> >
> > > The system stays running because there's something to do. The system
> > > won't suspend until all the processors hit the kernel idle loop and
> > > the next_timer_interrupt_critical() returns nothing.
> >
> > At which point an application in a busy loop cripples you.
>
> Maybe you could deal with the misbehaving untrusted apps in the userspace
> by sending kill -STOP to them when the screen blanks? Then continue
> when some event wakes up the system again.

And if that's the application that's listening to the network socket
that you want to get a wakeup event from? This problem is hard. I'd love
there to be an elegant solution based on using the scheduler, but I
really don't know what it is.

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

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