From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750905AbWGYSnu (ORCPT ); Tue, 25 Jul 2006 14:43:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750872AbWGYSns (ORCPT ); Tue, 25 Jul 2006 14:43:48 -0400 Received: from ra.tuxdriver.com ([70.61.120.52]:40199 "EHLO ra.tuxdriver.com") by vger.kernel.org with ESMTP id S1750842AbWGYSnr (ORCPT ); Tue, 25 Jul 2006 14:43:47 -0400 Date: Tue, 25 Jul 2006 14:43:28 -0400 From: Neil Horman To: Arjan van de Ven Cc: linux-kernel@vger.kernel.org, a.zummo@towertech.it, jg@freedesktop.org Subject: Re: [PATCH] RTC: Add mmap method to rtc character driver Message-ID: <20060725184328.GF4608@hmsreliant.homelinux.net> References: <20060725174100.GA4608@hmsreliant.homelinux.net> <1153850139.8932.40.camel@laptopd505.fenrus.org> <20060725182208.GD4608@hmsreliant.homelinux.net> <1153852375.8932.41.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1153852375.8932.41.camel@laptopd505.fenrus.org> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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 > > -- > if you want to mail me at work (you don't), use arjan (at) linux.intel.com > > - > 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/ -- /*************************************************** *Neil Horman *Software Engineer *gpg keyid: 1024D / 0x92A74FA1 - http://pgp.mit.edu ***************************************************/