From: "H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
To: joeyli <jlee-IBi9RG/b67k@public.gmane.org>,
Matt Fleming
<matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
Cc: "Rafael J. Wysocki" <rjw-LthD3rsA81gm4RdzfppkhA@public.gmane.org>,
Alessandro Zummo
<a.zummo-BfzFCNDTiLLj+vYz1yj4TQ@public.gmane.org>,
Matthew Garrett
<matthew.garrett-05XSO3Yj/JvQT0dZR+AlfA@public.gmane.org>,
Elliott-VXdhtT5mjnY@public.gmane.org,
samer.el-haj-mahmoud-VXdhtT5mjnY@public.gmane.org,
Oliver Neukum <oneukum-l3A5Bk7waGM@public.gmane.org>,
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-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Matt Fleming
<matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: Re: [RFC PATCH 06/14] rtc-efi: register rtc-efi device when EFI enabled
Date: Thu, 19 Dec 2013 20:30:48 -0800 [thread overview]
Message-ID: <52B3C7F8.3040901@zytor.com> (raw)
In-Reply-To: <1387513491.3539.4345.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.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
next prev parent reply other threads:[~2013-12-20 4:30 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-19 7:51 [RFC PATCH 00/14] Support timezone of ACPI TAD and EFI TIME Lee, Chun-Yi
2013-12-19 7:51 ` [PATCH 01/14] rtc-efi: fix decrease day twice when computing year days Lee, Chun-Yi
[not found] ` <1387439515-8926-1-git-send-email-jlee-IBi9RG/b67k@public.gmane.org>
2013-12-19 7:51 ` [PATCH 03/14] rtc: block registration of rtc-cmos when CMOS RTC Not Present Lee, Chun-Yi
2013-12-19 7:51 ` [RFC PATCH 04/14] ACPI: Add ACPI 5.0 Time and Alarm Device driver Lee, Chun-Yi
[not found] ` <1387439515-8926-5-git-send-email-jlee-IBi9RG/b67k@public.gmane.org>
2013-12-19 15:22 ` H. Peter Anvin
[not found] ` <52B30F43.1060306-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-12-20 5:41 ` joeyli
[not found] ` <1387518099.3539.4453.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2014-01-01 0:42 ` H. Peter Anvin
[not found] ` <52C3647B.7000708-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2014-01-06 8:58 ` joeyli
2014-01-07 5:37 ` H. Peter Anvin
2014-01-07 10:40 ` joeyli
2014-01-07 16:35 ` H. Peter Anvin
2014-01-08 14:59 ` joeyli
[not found] ` <1389193142.3539.6123.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2014-01-08 17:56 ` H. Peter Anvin
[not found] ` <52CD9139.2070302-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2014-01-09 3:47 ` joeyli
[not found] ` <1389239259.24105.2.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2014-01-09 4:00 ` H. Peter Anvin
2014-01-09 12:16 ` Rafael J. Wysocki
2014-01-02 8:09 ` Lan Tianyu
2014-01-06 9:20 ` joeyli
2013-12-19 7:51 ` [RFC PATCH 05/14] rtc: Add RTC driver of ACPI Time and Alarm Device Lee, Chun-Yi
2013-12-19 7:51 ` [RFC PATCH 06/14] rtc-efi: register rtc-efi device when EFI enabled Lee, Chun-Yi
2013-12-19 14:09 ` Matt Fleming
2013-12-20 4:24 ` joeyli
[not found] ` <1387513491.3539.4345.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2013-12-20 4:30 ` H. Peter Anvin [this message]
2013-12-20 10:37 ` Borislav Petkov
[not found] ` <20131220103755.GA14784-fF5Pk5pvG8Y@public.gmane.org>
2013-12-20 15:14 ` Matthew Garrett
2013-12-20 21:04 ` H. Peter Anvin
[not found] ` <52B4B0ED.7030600-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-12-21 1:24 ` joeyli
2013-12-21 1:51 ` H. Peter Anvin
2013-12-21 15:34 ` joeyli
2013-12-20 16:48 ` H. Peter Anvin
2013-12-19 7:51 ` [RFC PATCH 07/14] rtc-efi: add GMTOFF support to rtc_efi Lee, Chun-Yi
[not found] ` <1387439515-8926-8-git-send-email-jlee-IBi9RG/b67k@public.gmane.org>
2013-12-20 15:11 ` Matthew Garrett
2013-12-21 3:56 ` joeyli
2013-12-19 7:51 ` [RFC PATCH 08/14] rtc-efi: set uie_unsupported for indicate rtc-efi doesn't support UIE mode Lee, Chun-Yi
2013-12-19 7:51 ` [RFC PATCH 09/14] efi: move functions of access efi time to header file for sharing Lee, Chun-Yi
2013-12-19 7:51 ` [RFC PATCH 10/14] rtc: improve and move week day computing function to rtc header Lee, Chun-Yi
2013-12-19 7:51 ` [RFC PATCH 11/14] rtc: switch to get/set rtc time to efi functions if CMOS RTC Not Present git set Lee, Chun-Yi
2013-12-19 7:51 ` [RFC PATCH 12/14] efi: adjust system time base on timezone from EFI time services Lee, Chun-Yi
2013-12-19 7:51 ` [RFC PATCH 13/14] Documentation/RTC: add document of ACPI TAD and EFI TIME driver Lee, Chun-Yi
2013-12-19 7:51 ` [TEST PATCH 14/14] acpi: add early parameter to set CMOS RTC Not Present bit for testing Lee, Chun-Yi
[not found] ` <1387448416-11672-1-git-send-email-jlee@suse.com>
[not found] ` <1387448416-11672-1-git-send-email-jlee-IBi9RG/b67k@public.gmane.org>
2013-12-19 10:49 ` [PATCH 02/14] x86-64/efi: Use EFI to deal with platform wall clock (again) Matt Fleming
[not found] ` <20131219104908.GE3145-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org>
2013-12-19 13:32 ` joeyli
[not found] ` <1387459939.3539.4092.camel-ONCj+Eqt86TasUa73XJKwA@public.gmane.org>
2013-12-20 11:29 ` One Thousand Gnomes
2013-12-23 23:25 ` H. Peter Anvin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=52B3C7F8.3040901@zytor.com \
--to=hpa-ymnouzjc4hwavxtiumwx3w@public.gmane.org \
--cc=Elliott-VXdhtT5mjnY@public.gmane.org \
--cc=JBeulich-IBi9RG/b67k@public.gmane.org \
--cc=a.zummo-BfzFCNDTiLLj+vYz1yj4TQ@public.gmane.org \
--cc=jlee-IBi9RG/b67k@public.gmane.org \
--cc=linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org \
--cc=matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org \
--cc=matthew.garrett-05XSO3Yj/JvQT0dZR+AlfA@public.gmane.org \
--cc=mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org \
--cc=oneukum-l3A5Bk7waGM@public.gmane.org \
--cc=rjw-LthD3rsA81gm4RdzfppkhA@public.gmane.org \
--cc=rtc-linux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org \
--cc=samer.el-haj-mahmoud-VXdhtT5mjnY@public.gmane.org \
--cc=tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org \
--cc=trenn-l3A5Bk7waGM@public.gmane.org \
--cc=werner-IBi9RG/b67k@public.gmane.org \
--cc=x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).