From: john stultz <johnstul-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
To: "Kuwahara,T."
<6vvetjsrt26xsrzlh1z0zn4d2grdah-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Richard Cochran
<richardcochran-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Alan Cox <alan-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Christoph Lameter <cl-vYTEC60ixJUAvxtiuMwx3w@public.gmane.org>,
David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
Krzysztof Halasa <khc-9GfyWEdoJtJmR6Xm/wNWPw@public.gmane.org>,
Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Rodolfo Giometti <giometti-k2GhghHVRtY@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
Subject: Re: [PATCH V9 02/13] ntp: add ADJ_SETOFFSET mode bit
Date: Thu, 13 Jan 2011 12:57:08 -0800 [thread overview]
Message-ID: <1294952228.5617.20.camel@work-vm> (raw)
In-Reply-To: <AANLkTimHP1OsWauj6O566WgnxVTjMbNg2PK644QcT9Lq-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On Fri, 2011-01-14 at 05:39 +0900, Kuwahara,T. wrote:
> My proposal: Limit the adjustable range of the offset so that leap
> seconds will never occur more than once. (2147.5 seconds would be the
> best choice. :-)
2147.5? That's ~36 minutes.
While I think a limit could be a sensible compromise here. Leap seconds
are limited to every six months. So surely a limit of 86400 (one day),
or 2592000 (30 days) would be more reasonable.
thanks
-john
WARNING: multiple messages have this Message-ID (diff)
From: john stultz <johnstul@us.ibm.com>
To: "Kuwahara,T." <6vvetjsrt26xsrzlh1z0zn4d2grdah@gmail.com>
Cc: Richard Cochran <richardcochran@gmail.com>,
linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
netdev@vger.kernel.org, Alan Cox <alan@lxorguk.ukuu.org.uk>,
Arnd Bergmann <arnd@arndb.de>, Christoph Lameter <cl@linux.com>,
David Miller <davem@davemloft.net>,
Krzysztof Halasa <khc@pm.waw.pl>,
Peter Zijlstra <peterz@infradead.org>,
Rodolfo Giometti <giometti@linux.it>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH V9 02/13] ntp: add ADJ_SETOFFSET mode bit
Date: Thu, 13 Jan 2011 12:57:08 -0800 [thread overview]
Message-ID: <1294952228.5617.20.camel@work-vm> (raw)
In-Reply-To: <AANLkTimHP1OsWauj6O566WgnxVTjMbNg2PK644QcT9Lq@mail.gmail.com>
On Fri, 2011-01-14 at 05:39 +0900, Kuwahara,T. wrote:
> My proposal: Limit the adjustable range of the offset so that leap
> seconds will never occur more than once. (2147.5 seconds would be the
> best choice. :-)
2147.5? That's ~36 minutes.
While I think a limit could be a sensible compromise here. Leap seconds
are limited to every six months. So surely a limit of 86400 (one day),
or 2592000 (30 days) would be more reasonable.
thanks
-john
next prev parent reply other threads:[~2011-01-13 20:57 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-13 11:31 [PATCH V9 00/13] ptp: IEEE 1588 hardware clock support Richard Cochran
2011-01-13 11:31 ` Richard Cochran
[not found] ` <cover.1294917347.git.richard.cochran-3mrvs1K0uXizZXS1Dc/lvw@public.gmane.org>
2011-01-13 11:31 ` [PATCH V9 01/13] time: Introduce timekeeping_inject_offset Richard Cochran
2011-01-13 11:31 ` Richard Cochran
2011-01-13 11:32 ` [PATCH V9 02/13] ntp: add ADJ_SETOFFSET mode bit Richard Cochran
2011-01-13 11:32 ` Richard Cochran
[not found] ` <60566a54842bcf5974d55ed39f387c32ff9cf5cb.1294917348.git.richard.cochran-3mrvs1K0uXizZXS1Dc/lvw@public.gmane.org>
2011-01-13 20:39 ` Kuwahara,T.
2011-01-13 20:39 ` Kuwahara,T.
[not found] ` <AANLkTimHP1OsWauj6O566WgnxVTjMbNg2PK644QcT9Lq-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-01-13 20:57 ` john stultz [this message]
2011-01-13 20:57 ` john stultz
2011-01-13 21:52 ` john stultz
2011-01-13 21:52 ` john stultz
2011-01-13 11:32 ` [PATCH V9 03/13] posix clocks: introduce a syscall for clock tuning Richard Cochran
2011-01-13 11:32 ` Richard Cochran
2011-01-13 11:32 ` [PATCH V9 04/13] posix_clocks: add clock_adjtime for arm Richard Cochran
2011-01-13 11:33 ` [PATCH V9 05/13] posix_clocks: add clock_adjtime for blackfin Richard Cochran
2011-01-13 11:33 ` [PATCH V9 06/13] posix_clocks: add clock_adjtime for powerpc Richard Cochran
2011-01-13 11:33 ` [PATCH V9 07/13] posix_clocks: add clock_adjtime for x86 Richard Cochran
2011-01-13 11:35 ` [PATCH V9 08/13] posix clocks: cleanup the CLOCK_DISPTACH macro Richard Cochran
[not found] ` <90b2beef441615d01c93fcad029c44af4e505c5f.1294917348.git.richard.cochran-3mrvs1K0uXizZXS1Dc/lvw@public.gmane.org>
2011-01-13 17:03 ` Thomas Gleixner
2011-01-13 17:03 ` Thomas Gleixner
[not found] ` <alpine.LFD.2.00.1101131745400.2678-bi+AKbBUZKagILUCTcTcHdKyNwTtLsGr@public.gmane.org>
2011-01-14 7:48 ` Richard Cochran
2011-01-14 7:48 ` Richard Cochran
[not found] ` <20110114074837.GA8077-7KxsofuKt4IfAd9E5cN8NEzG7cXyKsk/@public.gmane.org>
2011-01-14 9:31 ` Thomas Gleixner
2011-01-14 9:31 ` Thomas Gleixner
2011-01-22 12:38 ` Richard Cochran
[not found] ` <20110122123840.GA30830-7KxsofuKt4IfAd9E5cN8NEzG7cXyKsk/@public.gmane.org>
2011-01-22 12:42 ` Thomas Gleixner
2011-01-22 12:42 ` Thomas Gleixner
2011-01-13 11:35 ` [PATCH V9 09/13] posix clocks: introduce dynamic clocks Richard Cochran
2011-01-13 11:35 ` [PATCH V9 10/13] ptp: Added a brand new class driver for ptp clocks Richard Cochran
2011-01-13 11:35 ` [PATCH V9 11/13] ptp: Added a clock that uses the eTSEC found on the MPC85xx Richard Cochran
2011-01-13 11:36 ` [PATCH V9 12/13] ptp: Added a clock driver for the IXP46x Richard Cochran
2011-01-13 11:36 ` [PATCH V9 13/13] ptp: Added a clock driver for the National Semiconductor PHYTER Richard Cochran
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