Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756753AbWKVTwM (ORCPT ); Wed, 22 Nov 2006 14:52:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756756AbWKVTwM (ORCPT ); Wed, 22 Nov 2006 14:52:12 -0500 Received: from caramon.arm.linux.org.uk ([217.147.92.249]:5133 "EHLO caramon.arm.linux.org.uk") by vger.kernel.org with ESMTP id S1756753AbWKVTwK (ORCPT ); Wed, 22 Nov 2006 14:52:10 -0500 Date: Wed, 22 Nov 2006 19:51:53 +0000 From: Russell King To: Alessandro Zummo Cc: Linux Kernel Mailing List , David Brownell , linuxppc-dev@ozlabs.org, Kumar Gala , Kim Phillips , Benjamin Herrenschmidt , Andi Kleen , akpm@osdl.org, davem@davemloft.net, kkojima@rr.iij4u.or.jp, lethal@linux-sh.org, paulus@samba.org, ralf@linux-mips.org Subject: Re: NTP time sync Message-ID: <20061122195153.GC22601@flint.arm.linux.org.uk> Mail-Followup-To: Alessandro Zummo , Linux Kernel Mailing List , David Brownell , linuxppc-dev@ozlabs.org, Kumar Gala , Kim Phillips , Benjamin Herrenschmidt , Andi Kleen , akpm@osdl.org, davem@davemloft.net, kkojima@rr.iij4u.or.jp, lethal@linux-sh.org, paulus@samba.org, ralf@linux-mips.org References: <20061122203633.611acaa8@inspiron> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061122203633.611acaa8@inspiron> User-Agent: Mutt/1.4.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1152 Lines: 33 On Wed, Nov 22, 2006 at 08:36:33PM +0100, Alessandro Zummo wrote: > > > wrto the in-kernel NTP synchronization, > as discussed before [1], my opinion > is that it should be done in userland. > > Keeping it in kernel implies subtle code > in each of the supported architectures. > > So, if the arch maintainers agree, > I would suggest to schedule it for removal. > > [1] http://lkml.org/lkml/2006/3/28/358 Fine, provided there's also a shell tool that can enquire whether the kernel is sync'd or not. (Currently the 11-minute update does not occur when the kernel is desynced from a time source - the RTC itself might be more accurate in this case.) Throwing hwclock commands into crontab such that they do not take note of the kernel's sync status is probably a very bad move in that respect. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: - 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/