linux-kernel - Re: [update] Re: [PATCH] PM: Make it possible to avoid wakeup events from being lost

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Date:	Wed, 30 Jun 2010 09:10:38 +0200
From:	Florian Mickler <florian@...kler.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	linux-pm@...ts.linux-foundation.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Neil Brown <neilb@...e.de>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	mark gross <640e9920@...il.com>,
	Arve Hjønnevåg <arve@...roid.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-pci@...r.kernel.org, Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: [update] Re: [PATCH] PM: Make it possible to avoid wakeup
 events from being lost

Hi Rafael!

On Mon, 28 Jun 2010 21:01:53 +0200
"Rafael J. Wysocki" <rjw@...k.pl> wrote:

> On Monday, June 28, 2010, Alan Stern wrote:
> > On Mon, 28 Jun 2010, Rafael J. Wysocki wrote:

> From: Rafael J. Wysocki <rjw@...k.pl>
> Subject: PM: Make it possible to avoid wakeup events from being lost

I have nothing substantial to add, but just wanted to let you know that
this approach seems like a good alternative to me. As far as I can see
the userspace suspend-blocker interface could be expressed in terms of
this kernel facility which brings android closer to mainline.

The only thing I haven't thought through yet is the 'maintain a discrete
set of constraints' vs 'just increment a number' thing. Especially if
what we loose in information through that (in comparison to 'the other
approach') is made up for by easier in-kernel-API.  I _think_ if there
is any need for in-kernel-accounting (i don't know that) it could be
retro-fitted by using the trace event infrastructure?

Cheers,
Flo
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