Re: [linux-pm] suspend blockers & Android integration

[Matthew Garrett]

On Sun, Jun 06, 2010 at 05:47:10PM +0200, Vitaly Wool wrote:
> 2010/6/6 Matthew Garrett <mjg59@xxxxxxxxxxxxx>:
> > The difference between idle-based suspend and opportunistic suspend is
> > that the former will continue to wake up for timers and will never be
> > entered if something is using CPU, whereas the latter will be entered
> > whenever no suspend blocks are held. The problem with opportunistic
> > suspend is that you might make the decision to suspend simultaneusly
> > with a wakeup event being received. Suspend blocks facilitate
> > synchronisation between the kernel and userspace to ensure that all such
> > events have been consumed and handld appropriately.
> 
> Right, and then you start taking suspend blockers in kernel here and
> there which eventually interferes with runtime PM.

Suspend blocks prevent system suspend, not any per-device suspend.

-- 
Matthew Garrett | mjg59@xxxxxxxxxxxxx
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