Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753319AbXFVG3f (ORCPT ); Fri, 22 Jun 2007 02:29:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751111AbXFVG3Z (ORCPT ); Fri, 22 Jun 2007 02:29:25 -0400 Received: from pythia.bakeyournoodle.com ([203.82.209.197]:54707 "EHLO pythia.bakeyournoodle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750769AbXFVG3Y (ORCPT ); Fri, 22 Jun 2007 02:29:24 -0400 Date: Fri, 22 Jun 2007 16:28:42 +1000 To: john stultz Cc: Daniel Walker , Thomas Gleixner , LKML , Andrew Morton , Ingo Molnar , LinuxPPC-dev Subject: Re: [RFC] clocksouce implementation for powerpc Message-ID: <20070622062842.GY9768@bakeyournoodle.com> References: <20070616101126.296384219@inhelltoy.tec.linutronix.de> <20070616101637.107940593@inhelltoy.tec.linutronix.de> <1182009083.11539.369.camel@imap.mvista.com> <20070620065710.GR9768@bakeyournoodle.com> <1182373561.6559.39.camel@localhost.localdomain> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <1182373561.6559.39.camel@localhost.localdomain> User-Agent: Mutt/1.5.13 (2006-08-11) From: tony@bakeyournoodle.com (Tony Breeds) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2013 Lines: 48 On Wed, Jun 20, 2007 at 02:06:01PM -0700, john stultz wrote: Hi John. > Hey Tony, > Thanks for sending this out! I really appreciate this work, as its been > on my todo forever, and I've just not been able to focus on it. > Currently it seems a bit minimal of a conversion (ideally there should > be very little time code left), but It looks like a great start! Thanks. > I might be missing a subtlety in the ppc code, but I'm still not sure if > I see the need for the clocksource settimeofday hook. > > update_vsyscall() is intended to provide a hook that allows the generic > time code to provide all the needed timekeeping state to the arch > specific vsyscall implementation. It is called any time the base > timekeeping variables are changed. Well as I just said the Daniel, I was under the impression I needed a hook that was only called from settimeofday(). The comments I've recieved from everyone has given me good cause to re-evaluate. I think I can make it work without the hook, that started this discussion. Thomas, I think it's probably best to axe it now. If I /really/ need it then I'll start the discussion again :) Thanks. > I think it would be enlightening to flatten this out a bit. Putting both > the timer_recalc_offset and clocksource_settime code in the same > function. It might illustrate where some optimizations could be done and > where it might make more sense to split things up. > > Also I'd leave timer_check_rtc() in the timer_interrupt for now (later > moving it to tglx's generic rtc update). Yes you're rigth I don't need to move the timer_check_rtc() call. Yours Tony linux.conf.au http://linux.conf.au/ || http://lca2008.linux.org.au/ Jan 28 - Feb 02 2008 The Australian Linux Technical Conference! - 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/