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

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Message-ID: <20100116181253.GC1603@ucw.cz>
Date:	Sat, 16 Jan 2010 19:12:53 +0100
From:	Pavel Machek <pavel@....cz>
To:	Stanislav Brabec <utx@...guin.cz>
Cc:	Eric Miao <eric.y.miao@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, 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,
	zaurus-devel@...ts.linuxtogo.org
Subject: Re: [suspend/resume] Re: userspace notification from module

On Sat 2010-01-16 18:00:58, Stanislav Brabec wrote:
> Eric Miao wrote:
> 
> > And the other way we may need to look into what API the current userland
> > apps on zaurus is depending on this 2.4 compatibility and make changes
> > slowly to those apps.
> 
> I guess that 2.4 compatibility is not an issue. Most modern Zaurus
> distributions are even unable to run Sharp ROM compatible binaries.
> 
> Distributions either stay on 2.4 kernel or use modern systems based on
> modern kernel 2.6 API.
> 
> Distributions that decided to migrate to kernel 2.6 are far from
> finished state. Any change that allows to use modern applications using
> standard kernel API is welcome.

There is no API involved. It is just ... if you leave zaurus in
 init=/bin/bash mode, it must not kill the battery. Smart and
 currently implemented way to do that is to suspend.

That's counterexample to rjw, but it does not matter -- reasonable
userland should never ever hit that, in a same way PCs should not hit
emergency power cut...
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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