From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756892Ab3LTQtm (ORCPT ); Fri, 20 Dec 2013 11:49:42 -0500 Received: from terminus.zytor.com ([198.137.202.10]:45755 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756797Ab3LTQtd (ORCPT ); Fri, 20 Dec 2013 11:49:33 -0500 User-Agent: K-9 Mail for Android In-Reply-To: <20131220103755.GA14784@pd.tnic> References: <1387439515-8926-1-git-send-email-jlee@suse.com> <1387439515-8926-7-git-send-email-jlee@suse.com> <20131219140918.GF3145@console-pimps.org> <1387513491.3539.4345.camel@linux-s257.site> <52B3C7F8.3040901@zytor.com> <20131220103755.GA14784@pd.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: Re: [RFC PATCH 06/14] rtc-efi: register rtc-efi device when EFI enabled From: "H. Peter Anvin" Date: Fri, 20 Dec 2013 08:48:04 -0800 To: Borislav Petkov CC: joeyli , Matt Fleming , "Rafael J. Wysocki" , Alessandro Zummo , Matthew Garrett , Elliott@hp.com, samer.el-haj-mahmoud@hp.com, Oliver Neukum , werner@suse.com, trenn@suse.de, JBeulich@suse.com, linux-kernel@vger.kernel.org, rtc-linux@googlegroups.com, x86@kernel.org, "linux-efi@vger.kernel.org" , linux-acpi@vger.kernel.org, Matt Fleming , Thomas Gleixner , Ingo Molnar Message-ID: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The only real use case for the RTC TZ is compatibility with other operating systems that don't keep the time in UTC, at least as far as I can tell. However, that is a fairly big one, especially in VM deployments. Borislav Petkov wrote: >On Thu, Dec 19, 2013 at 08:30:48PM -0800, H. Peter Anvin wrote: >> On 12/19/2013 08:24 PM, joeyli wrote: >> > I agreed, but userspace application should not be too often to >access >> > RTC. Maybe only when system boot and set timezone. >> >> This is, quite frankly, an idiotic argument. > >TBH, I've been struggling with the question too - and it might even be >a >stupid question - but what is that absolute need to be able to get the >TZ in userspace? Why should I care? > >Can we get some use cases for stupid people like me please? > >Thanks. -- Sent from my mobile phone. Please pardon brevity and lack of formatting.