Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756461Ab0HDStc (ORCPT ); Wed, 4 Aug 2010 14:49:32 -0400 Received: from exprod7og111.obsmtp.com ([64.18.2.175]:54339 "EHLO exprod7og111.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752491Ab0HDStb (ORCPT ); Wed, 4 Aug 2010 14:49:31 -0400 Message-ID: <4C59B5E1.9040707@genband.com> Date: Wed, 04 Aug 2010 12:48:01 -0600 From: Chris Friesen User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100430 Fedora/3.0.4-2.fc11 Thunderbird/3.0.4 MIME-Version: 1.0 To: john stultz CC: Alexander Shishkin , gregkh@suse.de, lkml@vger.kernel.org, "Kirill A. Shutemov" , Thomas Gleixner , Martin Schwidefsky , Andrew Morton , Jon Hunter , Ingo Molnar , Peter Zijlstra , "Paul E. McKenney" , David Howells , Avi Kivity , "H. Peter Anvin" , John Kacur , linux-kernel@vger.kernel.org Subject: Re: [PATCH] [RFC] notify userspace about time changes References: <1280926108-24668-1-git-send-email-virtuoso@slind.org> <1280937526.28884.21.camel@work-vm> In-Reply-To: <1280937526.28884.21.camel@work-vm> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 04 Aug 2010 18:48:04.0668 (UTC) FILETIME=[9272F7C0:01CB3405] X-TM-AS-Product-Ver: SMEX-8.0.0.4160-6.500.1024-17550.001 X-TM-AS-Result: No--14.454900-5.000000-31 X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1007 Lines: 27 On 08/04/2010 09:58 AM, john stultz wrote: > Is there a actual use case that you need this for? I don't really have > an issue with the code I just really want to make sure the feature would > be useful enough to justify the API and code maintenance going forward. We actually added a time-change-notification mechanism internally a long time ago but never saw demand for it and so never bothered trying to push it upstream. Ours is signal-based. Among other things we use it to pass on time-change notifications to an emulator running a proprietary OS that really cares about having an accurate time-of-day but can't afford a syscall to retrieve it every time. Chris -- Chris Friesen Software Developer GENBAND chris.friesen@genband.com www.genband.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/