From: Roman Zippel <zippel@linux-m68k.org>
To: john stultz <johnstul@us.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org
Subject: Re: [RFC] HZ free ntp
Date: Mon, 1 Jan 2007 17:27:45 +0100 [thread overview]
Message-ID: <200701011727.46944.zippel@linux-m68k.org> (raw)
In-Reply-To: <1166578357.5594.3.camel@localhost>
Hi,
On Wednesday 20 December 2006 02:32, john stultz wrote:
> > I know and all you have to change in the ntp and some related code is to
> > replace HZ there with a variable, thus make it changable, so you can
> > increase the update interval (i.e. it becomes 1s/hz instead of 1s/HZ).
>
> Untested patch below. Does this vibe better with you are suggesting?
Yes, thanks.
tick_nsec doesn't require special treatment, in the middle term it's obsolete
anyway, it could be replaced with (current_tick_length() >>
TICK_LENGTH_SHIFT) and current_tick_length() being inlined.
NTP_INTERVAL_FREQ could be a real variable (so it can be initialized at
runtime), it's already gone from all important paths.
In the short term I'd prefered a clock would store its frequency instead of
using NTP_INTERVAL_LENGTH in clocksource_calculate_interval(), so it doesn't
has to be derived there.
bye, Roman
next prev parent reply other threads:[~2007-01-01 19:23 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-05 4:40 -mm merge plans for 2.6.20 Andrew Morton
2006-12-05 4:56 ` Jeff Garzik
2006-12-05 5:41 ` Andrew Morton
2006-12-05 7:04 ` Jens Axboe
2006-12-05 15:00 ` Mark Lord
2006-12-06 19:19 ` Conke Hu
2006-12-06 19:26 ` Randy Dunlap
2006-12-06 19:40 ` Jeff Garzik
2006-12-06 22:36 ` Andrew Morton
2006-12-05 5:14 ` Paul Mackerras
2006-12-05 5:42 ` Andrew Morton
2006-12-05 5:53 ` Nick Piggin
2006-12-05 5:49 ` Nick Piggin
2006-12-05 8:36 ` Gautham R Shenoy
2006-12-05 8:47 ` Peter Zijlstra
2006-12-05 11:06 ` ext2 future [was Re: -mm merge plans for 2.6.20] Pavel Machek
2006-12-05 13:23 ` -mm merge plans for 2.6.20 John W. Linville
2006-12-05 14:27 ` Roman Zippel
2006-12-06 3:46 ` Horst Schirmeier
2006-12-05 16:02 ` Dave Jones
2006-12-12 17:49 ` Dave Jones
2006-12-19 5:20 ` Nick Piggin
2006-12-19 6:44 ` Dave Jones
2006-12-19 7:02 ` Nick Piggin
2007-01-07 17:36 ` page_mapcount(page) went negative Dave Jones
2007-01-10 23:53 ` Nick Piggin
2006-12-05 17:35 ` -mm merge plans for 2.6.20 James Simmons
2006-12-05 18:01 ` Andrew Morton
2006-12-05 18:25 ` James Simmons
2006-12-05 18:37 ` [PATCH] backlight sysfs change to the fbdev drivers James Simmons
2006-12-05 18:37 ` James Simmons
2006-12-05 19:43 ` -mm merge plans for 2.6.20 Andrew Morton
2006-12-05 19:59 ` James Simmons
2006-12-05 20:20 ` Andrew Morton
2006-12-05 21:34 ` James Simmons
2006-12-06 23:40 ` Andrew Morton
2006-12-07 14:31 ` James Simmons
2006-12-05 20:40 ` Miguel Ojeda
2006-12-06 14:42 ` James Simmons
2006-12-05 19:18 ` Josef Sipek
2006-12-05 19:21 ` [PATCH 1/2] fsstack: Make fsstack_copy_attr_all copy inode size Josef Sipek
2006-12-05 19:22 ` [PATCH 2/2] fsstack: Fix up ecryptfs's fsstack usage Josef Sipek
2006-12-05 22:28 ` Andrew Morton
2006-12-05 22:38 ` Josef Sipek
2006-12-05 22:49 ` Andrew Morton
2006-12-05 23:16 ` Josef Sipek
2006-12-05 21:00 ` -mm merge plans for 2.6.20 Ingo Molnar
2006-12-05 21:17 ` -mm merge plans for 2.6.20, scheduler bits Ingo Molnar
2006-12-05 20:59 ` Siddha, Suresh B
2006-12-05 21:47 ` Ingo Molnar
2006-12-05 21:29 ` Miguel Ojeda
2006-12-06 2:59 ` -mm merge plans for 2.6.20 Roman Zippel
2006-12-06 4:30 ` Andrew Morton
2006-12-06 8:32 ` Thomas Gleixner
2006-12-06 12:54 ` Roman Zippel
2006-12-06 13:11 ` Ingo Molnar
2006-12-06 14:33 ` Roman Zippel
2006-12-06 15:22 ` Ingo Molnar
2006-12-06 16:42 ` Roman Zippel
2006-12-06 16:58 ` Ingo Molnar
2006-12-06 16:59 ` Ingo Molnar
2006-12-12 20:40 ` [RFC] HZ free ntp john stultz
2006-12-13 9:51 ` Ingo Molnar
2006-12-13 18:48 ` john stultz
2006-12-13 13:47 ` Roman Zippel
2006-12-13 19:19 ` john stultz
2006-12-13 20:40 ` Roman Zippel
2006-12-20 1:32 ` john stultz
2006-12-20 1:54 ` john stultz
2006-12-21 4:26 ` Andrew Morton
2007-01-01 18:29 ` Roman Zippel
2007-01-02 19:46 ` john stultz
2007-01-02 20:50 ` john stultz
2007-01-06 16:56 ` Roman Zippel
2007-01-22 19:27 ` [patch] HZ-free NTP Ingo Molnar
2007-01-22 19:39 ` Ingo Molnar
2007-01-01 16:27 ` Roman Zippel [this message]
2007-01-02 19:42 ` [RFC] HZ free ntp john stultz
2007-01-06 16:46 ` Roman Zippel
2006-12-06 12:33 ` -mm merge plans for 2.6.20 Roman Zippel
2006-12-08 14:09 ` Stephen Smalley
2006-12-08 20:58 ` Andrew Morton
2006-12-10 15:07 ` Mimi Zohar
2006-12-09 9:30 ` Randy Dunlap
2006-12-09 9:44 ` Andrew Morton
2006-12-10 20:12 ` Randy Dunlap
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