Messages in this thread | | | Date | Wed, 24 Jan 2007 14:01:06 +0000 | From | Pavel Machek <> | Subject | Re: [ANNOUNCE] System Inactivity Monitor v1.0 |
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Hi! > > > >> But I still believe it can be out. > >> > >> Do you believe it could be a user-space daemon or > >what? > > > >Yes, what prevents userspace daemon watching > >/dev/input/event* to > >provide this functionality? > > Pavel > --- > > One possible argument is to allow integrating > "input-like" user events > with other kinds of system-level events that you might > want to have > treated like user activity. For instance, our definition > of user > activity includes: button presses, opening-closing the > cover (on a > phone), and plugging in or removing memory cards, > accessories, or > cables. We actually use a mix of kernel and user-space > monitoring,
Well... input already has 'pseudokey' for lid, and yes, you probably can monitor cover, memory cards and cables from userspace, already... as you do. Cover, and maybe even cards/cables could be integrated with input infrastructure, too.
(Still waiting for you to start selling those cool phones in czech republic :-).
> A user-space monitor also has more opportunity for races > - for > instance, deciding that the inactivity timeout has > occurred between > the time that the user does something and the time that > the kernel > gets a notification up to user space.
Same races are inside kernel, too.
> My own hot button is making sure that the definition of > what > constitutes user activity is managed in exactly one > place, whether in > the kernel or not. My naive model would be to put the > response at user > level, but to provide a single point of definition in > the kernel (say, > /dev/useractivity or the equivalent) that the user-level > daemon could > listen to.
Actually, I believe right solution is to provide one, unified, monitoring daemon, using whatever interfaces are available. (+ add missing functionality to the kernel, if neccessary).
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@vger.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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