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From: Roman Zippel <zippel@linux-m68k.org>
To: john stultz <johnstul@us.ibm.com>
Cc: lkml <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@elte.hu>, Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [PATCH] Remove obsolete CLOCK_TICK_ADJUST
Date: Sun, 2 Mar 2008 05:03:51 +0100 (CET)	[thread overview]
Message-ID: <Pine.LNX.4.64.0803020420120.2723@scrub.home> (raw)
In-Reply-To: <1204326690.6136.15.camel@localhost.localdomain>

Hi,

On Fri, 29 Feb 2008, john stultz wrote:

> I'm still not happy about the granularity issue (or non-issue in your
> mind),

It's an issue, but it's not as big as you seem to think.
The error drift should be small and 150ppm isn't too good, but it isn't an 
error to be too worried about.
As the alpha example shows, in the past we already tried to reduce this 
error anyway, in this case by choosing an appropriate HZ value.

> but both my version and your version of the solution are pretty
> close at this point and I can rework my difference on-top of this patch
> without much trouble.

Practically it should be enough to just check the base drift and print a 
warning message, as it suggest to be more likely a configuration error.

bye, Roman

  reply	other threads:[~2008-03-02  4:04 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-24  2:38 [PATCH] correct inconsistent ntp interval/tick_length usage john stultz
2008-01-24  9:14 ` Valdis.Kletnieks
2008-01-25 14:07 ` Roman Zippel
2008-01-29  2:28   ` john stultz
2008-01-29  4:02     ` Roman Zippel
2008-01-30  2:14       ` john stultz
2008-01-31  1:55         ` Roman Zippel
2008-01-31  2:16           ` john stultz
2008-01-31  5:02             ` Roman Zippel
2008-02-02  1:02               ` John Stultz
2008-02-08 17:33                 ` Roman Zippel
2008-02-09  2:17                   ` john stultz
2008-02-09  4:47                     ` Roman Zippel
2008-02-09  5:04                       ` Andrew Morton
2008-02-09 14:13                         ` Roman Zippel
2008-02-10 18:45                     ` Roman Zippel
2008-02-12  0:09                       ` john stultz
2008-02-12 14:36                         ` Roman Zippel
2008-02-14  4:36                           ` john stultz
2008-02-16  4:24                             ` Roman Zippel
2008-02-19  1:02                               ` john stultz
2008-02-19  4:04                                 ` Roman Zippel
2008-02-20  1:50                                   ` john stultz
2008-02-20 17:08                                     ` Roman Zippel
2008-02-22  2:39                                       ` john stultz
2008-02-25 14:44                                         ` Roman Zippel
2008-02-29  4:49                                         ` [PATCH] Remove obsolete CLOCK_TICK_ADJUST Roman Zippel
2008-02-29  6:25                                           ` Ray Lee
2008-02-29 13:31                                             ` Roman Zippel
2008-02-29 22:08                                           ` Andrew Morton
2008-02-29 22:27                                             ` Roman Zippel
2008-02-29 22:38                                               ` Andrew Morton
2008-02-29 23:11                                               ` john stultz
2008-02-29 23:11                                           ` john stultz
2008-03-02  4:03                                             ` Roman Zippel [this message]
2008-02-29 18:54                                         ` [PATCH] correct inconsistent ntp interval/tick_length usage Jörg-Volker Peetz

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