Re: [linux-pm] [PATCH] - race-free suspend. Was: Re: [PATCH 0/8] Suspend block api (version 8)

mark gross
2010-06-03T13:36:36Z

On Wed, Jun 02, 2010 at 11:12:39PM -0700, Brian Swetland wrote:
> On Wed, Jun 2, 2010 at 11:04 PM, mark gross <640e9920@gmail.com> wrote:
> >>
> >> There are many wakeup events possible in a typical system --
> >> keypresses or other input events, network traffic, telephony events,
> >> media events (fill audio buffer, fill video decoder buffer, etc), and
> >> I think requiring that all wakeup event processing bottleneck through
> >> a single userspace process is non-optimal here.
> >
> > Um doesn't the android framework bottleneck the user mode lock
> > processing through the powermanager and any wake up event processing
> > eventually has to grab a lock through this bottleneck anyway?
>
> For "high level" framework/application level wakelocks, yes, but lower
> level components beneath the java api layer use the kernel interface
> directly.
>
Oh. I thought everything went through
hardware/libhardware_legacy/power/power.c
who else is hitting /sys/power/* in the android user mode then?

I'll have to go hunting for them I guess.

--mgross