linux-kernel - Re: [PATCH V8 02/13] ntp: add ADJ

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Message-ID: <AANLkTikigXGSACF6R6kfNHyKZ7GFWrUrCMxygvL3fUC6@mail.gmail.com>
Date:	Mon, 10 Jan 2011 06:07:26 +0900
From:	"Kuwahara,T." <6vvetjsrt26xsrzlh1z0zn4d2grdah@...il.com>
To:	Richard Cochran <richardcochran@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
	netdev@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	Christoph Lameter <cl@...ux.com>,
	David Miller <davem@...emloft.net>,
	John Stultz <johnstul@...ibm.com>,
	Krzysztof Halasa <khc@...waw.pl>,
	Peter Zijlstra <peterz@...radead.org>,
	Rodolfo Giometti <giometti@...ux.it>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH V8 02/13] ntp: add ADJ_SETOFFSET mode bit

On Sun, Jan 9, 2011 at 2:50 AM, Richard Cochran
<richardcochran@...il.com> wrote:
> we want to be able to jump the clock arbitrarily.

Another problem remains:  How do you deal with leap seconds?  I mean,
given that 1 minute is not always 60 seconds, then what time was it
XXXXX seconds ago?   Maybe some kind of lookup table is necessary, but
in such case, isn't it a better choice just to use the
clock_settime/settimeofday syscall?
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