Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751674Ab0HRW57 (ORCPT ); Wed, 18 Aug 2010 18:57:59 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:42917 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751006Ab0HRW5z (ORCPT ); Wed, 18 Aug 2010 18:57:55 -0400 Date: Wed, 18 Aug 2010 15:57:02 -0700 From: Andrew Morton To: Alexander Shishkin Cc: lkml@vger.kernel.org, "Kirill A. Shutemov" , Thomas Gleixner , John Stultz , Martin Schwidefsky , Jon Hunter , Ingo Molnar , Peter Zijlstra , "Paul E. McKenney" , David Howells , Avi Kivity , "H. Peter Anvin" , John Kacur , Chris Friesen , Kay Sievers , Greg KH , linux-kernel@vger.kernel.org Subject: Re: [PATCH] [RFCv2] notify userspace about time changes Message-Id: <20100818155702.bc62b2a6.akpm@linux-foundation.org> In-Reply-To: <1282139739-23832-1-git-send-email-virtuoso@slind.org> References: <1282139739-23832-1-git-send-email-virtuoso@slind.org> X-Mailer: Sylpheed 2.4.8 (GTK+ 2.12.9; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1054 Lines: 26 On Wed, 18 Aug 2010 16:55:39 +0300 Alexander Shishkin wrote: > Certain userspace applications (like "clock" desktop applets or cron) might > want to be notified when some other application changes the system time. The requirements sound a bit fluffy to me. Any time-displaying application will find out the new time next time it reads the time. So afaict this is only really useful for clock applets which display once per minute, so they will show the new time promptly after the time was altered, yes? Is that really worth adding new code for? > It > might also be important for an application to be able to distinguish between > its own and somebody else's time changes. hm. Why? What are you thinking of here, specifically? Also... what's the story with kernel-NTP updates? -- 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/