Re: [PATCH] RTC: Add mmap method to rtc character driver

Neil Horman
2006-07-25T18:43:50Z

On Tue, Jul 25, 2006 at 08:32:55PM +0200, Arjan van de Ven wrote:
>
> > > 3) this will negate the power gain you get for tickless kernels, since
> > > now they need to start ticking again ;( )
> > >
> > That is true, but only in the case where someone opens up /dev/rtc, and if they
> > open that driver and send it a UIE or PIE ioctl, it will start ticking
> > regardless of this patch (or that is at least my impression).
>
> but.. if that's X like you said.. then it's basically "always"...
>
Well, not always (considering the number of non-X embedded systems out there),
but I take your point. So it really boils down to not having a tickless kernel,
or an X server that calls gettimeofday 1 million times per second (I think thats
the number that Dave threw out there). Unless of course, you have a third
alternative, which, as I mentioned before I would be happy to take a crack at,
if you would elaborate on your idea a little more.

Thanks & Regards
Neil

>
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*Neil Horman
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