linux-kernel - Re: lsusd - The Linux SUSpend Daemon

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Message-ID: <20111022090937.7c0d8e8e@notabene.brown>
Date:	Sat, 22 Oct 2011 09:09:37 +1100
From:	NeilBrown <neilb@...e.de>
To:	david@...g.hm
Cc:	Alan Stern <stern@...land.harvard.edu>,
	John Stultz <john.stultz@...aro.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	mark gross <markgross@...gnar.org>,
	Linux PM list <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: lsusd - The Linux SUSpend Daemon

On Fri, 21 Oct 2011 13:10:10 -0700 (PDT) david@...g.hm wrote:

> On Fri, 21 Oct 2011, NeilBrown wrote:
> 
> > Hi,
> >
> > I wasn't going to do this... but then I did.  I think that sometimes coding is
> > a bit like chocolate.
> >
> > At:
> >    git://neil.brown.name/lsusd
> > or
> >    http://neil.brown.name/git/lsusd
> >
> > you can find a bunch of proof-of-concept sample code that implements a
> > "Linux SUSpend Daemon" with client support library and test programs.
> >
> > I haven't actually tested it as root and had it actually suspend and resume
> > and definitely haven't had it even close to a race condition, but the
> > various bits seem to work with each other properly when I run them under
> > strace and watch.
> >
> > It didn't turn out quite the way I imagined, but then cold harsh reality has
> > a way of destroying our dreams, doesn't it :-)
> >
> >
> > Below is the README file.  Comment welcome as always.
> > I'm happy for patches too, but I'm equally happy for someone to re-write it
> > completely and make something really useful and maintainable.
> 
> have you put any thought into the idea of extending this slightly to 
> handle the userspace wakelock interface to potentially allow this to run 
> android userspace on a stock kernel?
> 
> I realize that there are other things that would be needed as well, but 
> the wakelock interface is a biggie.
> 
> David Lang

I have certainly thought of someone else doing it :-)
I only have a high-level understanding of Android interfaces and don't really
want to go any deeper than that.

Thanks,
NeilBrown

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