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

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Date:	Fri, 20 Dec 2013 08:48:04 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...en8.de>
CC:	joeyli <jlee@...e.com>, Matt Fleming <matt@...sole-pimps.org>,
	"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

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 <bp@...en8.de> 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.
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