linux-kernel - Re: [RFC PATCH 06/14] rtc-efi: register rtc-efi device when EFI enabled

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Date:	Thu, 19 Dec 2013 20:30:48 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	joeyli <jlee@...e.com>, Matt Fleming <matt@...sole-pimps.org>
CC:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Matthew Garrett <matthew.garrett@...ula.com>, Elliott@...com,
	samer.el-haj-mahmoud@...com, Oliver Neukum <oneukum@...e.de>,
	werner@...e.com, trenn@...e.de, JBeulich@...e.com,
	linux-kernel@...r.kernel.org, rtc-linux@...glegroups.com,
	x86@...nel.org,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	linux-acpi@...r.kernel.org, Matt Fleming <matt.fleming@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [RFC PATCH 06/14] rtc-efi: register rtc-efi device when EFI enabled

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


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