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

[Felipe Contreras]

2010/6/6 Matthew Garrett <mjg59@xxxxxxxxxxxxx>:
> On Sun, Jun 06, 2010 at 07:21:49PM +0200, Vitaly Wool wrote:
>> 2010/6/6 Matthew Garrett <mjg59@xxxxxxxxxxxxx>:
>>
>> > Suspend blocks prevent system suspend, not any per-device suspend.
>>
>> Can you suspend a device which is holding a wake lock?
>
> Yes. Suspend blocks are orthogonal to runtime PM.

In that sense yes, but as it has been stated before; if Android
user-space concentrates on getting suspend blockers right, then the
timers in user-space will not be aligned correctly, and runtime PM
wouldn't work that great. Moreover, opportunistic suspend takes the
device out of idle. So, as runtime PM gets better, there's a point
where opportunistic suspend makes the situation worst.

So they are _mostly_ orthogonal, but not completely, at least for the
analysis of suspend blockers' usefulness.

-- 
Felipe Contreras
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/