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Date: Tue, 19 Jan 2010 06:15:38 +0100 From: Pavel Machek <pavel@....cz> To: Russell King - ARM Linux <linux@....linux.org.uk> Cc: "Rafael J. Wysocki" <rjw@...k.pl>, Andy Walls <awalls@...ix.net>, Eric Miao <eric.y.miao@...il.com>, omegamoon@...il.com, dbaryshkov@...il.com, Cyril Hrubis <metan@....cz>, arminlitzel@....de, linux-kernel@...r.kernel.org, Dirk@...er-online.de, Stanislav Brabec <utx@...guin.cz>, lenz@...wisc.edu, rpurdie@...ys.net, linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>, Bart?omiej Zimo? <uzi18@...pl>, zaurus-devel@...ts.linuxtogo.org, Daniel Borkmann <danborkmann@...glemail.com>, thommycheck@...il.com Subject: Re: [suspend/resume] Re: userspace notification from module On Sun 2010-01-17 13:26:18, Russell King - ARM Linux wrote: > On Sun, Jan 17, 2010 at 02:07:39PM +0100, Pavel Machek wrote: > > AFAICT following message would be nice. > > > > 1) battery is critical, userspace please do something > > > > On zaurus and similar, you could add > > > > 2) oh and btw we had power failure so we suspended (or maybe -- so > > hardware suspended itself -- rmk's examples and old apm systems); we > > are now back and running > > > > notification... but... ideally those power failures should never > > happen anyway, so... having this notification is in no way neccessary. > > There's another consideration here: the more complex the emergency > procedure, the higher the chance of _something_ causing it to fail, > and if it does fail, the result is data loss. That's why I propose to only send notification after we resume from emergency suspend :-). > In a properly running system, this isn't something that's going to > get a lot of testing, so there's a higher chance that there will be > bugs, so the simpler the solution, the better. Unfortunately, with old battery in zaurus, I tested it rather a lot. I have new one now, but I can still use old one for testing. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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