Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964861AbWC2AG0 (ORCPT ); Tue, 28 Mar 2006 19:06:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964863AbWC2AGZ (ORCPT ); Tue, 28 Mar 2006 19:06:25 -0500 Received: from waste.org ([64.81.244.121]:54438 "EHLO waste.org") by vger.kernel.org with ESMTP id S964861AbWC2AGY (ORCPT ); Tue, 28 Mar 2006 19:06:24 -0500 Date: Tue, 28 Mar 2006 18:03:45 -0600 From: Matt Mackall To: Alessandro Zummo Cc: Benjamin Herrenschmidt , Andi Kleen , akpm@osdl.org, torvalds@osdl.org, davem@davemloft.net, kkojima@rr.iij4u.or.jp, lethal@linux-sh.org, paulus@samba.org, ralf@linux-mips.org, rmk@arm.linux.org.uk, linux-kernel@vger.kernel.org Subject: 11 minute RTC update (was Re: Remove RTC UIP) Message-ID: <20060329000345.GZ3642@waste.org> References: <200603270920.k2R9KYYx007214@shell0.pdx.osdl.net> <20060327111836.GA79131@muc.de> <20060327163218.GD3642@waste.org> <20060327190037.GB27030@muc.de> <20060327211143.55ef7c4e@inspiron> <1143512075.2284.2.camel@localhost.localdomain> <20060329000215.683eb2d5@inspiron> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20060329000215.683eb2d5@inspiron> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1146 Lines: 31 [linux-kernel cc:ed] On Wed, Mar 29, 2006 at 12:02:15AM +0200, Alessandro Zummo wrote: > On Tue, 28 Mar 2006 13:14:34 +1100 > Benjamin Herrenschmidt wrote: > > > > While we are on the topic, I would like to ask everyone about > > > the 11 min ntp/rtc update feature of the kernel. > > > > > > It is something that makes sense to move to > > > userland? > > > > YES !!! :) > > great! given that it is not implemented in the new RTC subsystem > and nobody objected, I will not add it :) I agree that this should be migrated to userspace, but I'm more worried about the functionality impact here than for the UIP case. With existing NTP setups, and the kernel no longer writing to the RTC, you might have the RTC drift far enough that NTP failed to sync on the next boot. (Correct me if I'm wrong, of course.) -- Mathematics is the supreme nostalgia of our time. - 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/