linux-kernel - Re: [RFC][PATCH 4/4] time: Do leapsecond adjustment in gettime fastpaths

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Message-ID: <55718A00.5010208@redhat.com>
Date:	Fri, 05 Jun 2015 07:37:36 -0400
From:	Prarit Bhargava <prarit@...hat.com>
To:	Richard Cochran <richardcochran@...il.com>
CC:	Peter Zijlstra <peterz@...radead.org>,
	John Stultz <john.stultz@...aro.org>,
	Ingo Molnar <mingo@...nel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Daniel Bristot de Oliveira <bristot@...hat.com>,
	Jan Kara <jack@...e.cz>, Jiri Bohac <jbohac@...e.cz>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Shuah Khan <shuahkh@....samsung.com>
Subject: Re: [RFC][PATCH 4/4] time: Do leapsecond adjustment in gettime fastpaths



On 06/05/2015 05:04 AM, Richard Cochran wrote:
> On Fri, Jun 05, 2015 at 09:29:13AM +0200, Peter Zijlstra wrote:
>> That leaves the question; for who is this exact second edge important?
> 
> Distributed applications using the UTC time scale.
> 
> Many control applications are done with a 1 millisecond period.
> Having the time wrong by a second for 10 or 100 loops is bad news.
> 

Anything starting @ UTC midnight (I think that would be Beijing, China?) ...
being one second off is not good.

P.

> Thanks,
> Richard
> 
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