From mboxrd@z Thu Jan 1 00:00:00 1970 From: "H. Peter Anvin" Subject: Re: [RFC PATCH 06/14] rtc-efi: register rtc-efi device when EFI enabled Date: Thu, 19 Dec 2013 20:30:48 -0800 Message-ID: <52B3C7F8.3040901@zytor.com> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1387513491.3539.4345.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org> Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: joeyli , Matt Fleming Cc: "Rafael J. Wysocki" , Alessandro Zummo , Matthew Garrett , Elliott-VXdhtT5mjnY@public.gmane.org, samer.el-haj-mahmoud-VXdhtT5mjnY@public.gmane.org, Oliver Neukum , werner-IBi9RG/b67k@public.gmane.org, trenn-l3A5Bk7waGM@public.gmane.org, JBeulich-IBi9RG/b67k@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, rtc-linux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, "linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Matt Fleming , Thomas Gleixner , Ingo Molnar List-Id: linux-acpi@vger.kernel.org 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. Userspace doesn't access the RTC, the kernel does, and if the underlying implementation is broken it doesn't matter if it is accessed one time or a thousand. For the record, in most cases the RTC gets accessed about every 15 minutes to update the time based on network time. -hpa