linux-kernel - Re: [suspend/resume] Re: userspace notification from module

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Message-ID: <20100116221454.GA8425@elf.ucw.cz>
Date:	Sat, 16 Jan 2010 23:14:54 +0100
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Bart?omiej Zimo? <uzi18@...pl>, Andy Walls <awalls@...ix.net>,
	Daniel Borkmann <danborkmann@...glemail.com>,
	linux-kernel@...r.kernel.org, rpurdie@...ys.net, lenz@...wisc.edu,
	Dirk@...er-online.de, arminlitzel@....de,
	Cyril Hrubis <metan@....cz>, thommycheck@...il.com,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	dbaryshkov@...il.com, omegamoon@...il.com, eric.y.miao@...il.com,
	utx@...guin.cz, zaurus-devel@...ts.linuxtogo.org
Subject: Re: [suspend/resume] Re: userspace notification from module

Hi!

> > Agreed, but so what? On PC, machine would power off at that
> > point. That would surprise the apps, too.
> > 
> > Basically new enough userland should not make battery run low enough
> > for either emergency power off or emergency suspend.
> 
> I wonder how it is supposed to achieve that without knowing the current battery
> status.  Do you mean it should poll the battery driver?

That's besides point, is it?

Usual kernel<->user interfaces should apply here. Zaurus provides
/proc/apm emulation, and I'm writing drivers/power/ driver. Not sure
it has event interface...
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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