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From: Gabriel Paubert <paubert@iram.es>
To: Roger Leigh <rleigh@whinlatter.ukfsn.org>
Cc: Linux Kernel ML <linux-kernel@vger.kernel.org>,
	Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	debian-powerpc@lists.debian.org
Subject: Re: 2.6.16-rc2 powerpc timestamp skew
Date: Sun, 12 Feb 2006 18:39:26 +0100	[thread overview]
Message-ID: <20060212173926.GA6254@iram.es> (raw)
In-Reply-To: <87pslspkj5.fsf@hardknott.home.whinlatter.ukfsn.org>

On Sun, Feb 12, 2006 at 05:13:50PM +0000, Roger Leigh wrote:
> Hi folks,
> 
> When running a 2.6.16-rc2 kernel on a powerpc system (Mac Mini;
> Freescale 7447A):
> 
> $ date && touch f && ls -l f && rm -f f && date
> Sun Feb 12 12:20:14 GMT 2006
> -rw-r--r-- 1 rleigh rleigh 0 2006-02-12 12:23
> Sun Feb 12 12:20:14 GMT 2006
> 
> Notice the timestamp is 3 minutes in the future compared with the
> system time.  "make" is not a very happy bunny running on this kernel
> due to every touched file being 3 minutes in the future.
> 
> When the same command is run on 2.6.15.3:
> 
> $ date && touch f && ls -l f && rm -f f && date
> Sun Feb 12 14:27:27 GMT 2006
> -rw-r--r-- 1 rleigh rleigh 0 2006-02-12 14:27
> Sun Feb 12 14:27:27 GMT 2006
> 
> In this case the times are identical, as you would expect.
> 
> In both these cases, the chrony NTP daemon is running, if that might
> be a problem.

I don't know whether it is reloated, but since I installed
a 2.6.16-rc2 kernel on my G4/466, I have log messages
that claim that the clock error rate is too large for NTP
to correct (larger than 512ppm).

	Gabriel

  reply	other threads:[~2006-02-12 17:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-02-12 17:13 2.6.16-rc2 powerpc timestamp skew Roger Leigh
2006-02-12 17:39 ` Gabriel Paubert [this message]
2006-02-12 17:58 ` Roger Leigh
2006-02-12 20:15   ` Bin Zhang
2006-02-12 19:55 ` Olaf Hering
2006-02-13 10:57   ` Olaf Hering
2006-02-13 12:51     ` Olaf Hering
2006-02-12 21:33 ` Benjamin Herrenschmidt
2006-02-13 18:34   ` Roger Leigh
2006-02-13 22:34     ` Benjamin Herrenschmidt
2006-02-15  5:27       ` Paul Mackerras
2006-02-15 10:30         ` Olaf Hering
2006-02-15 11:53         ` Mikael Pettersson
2006-02-16 11:30         ` Roger Leigh
2006-02-13  0:13 ` Andrew Morton
2006-02-13  0:41   ` Roger Leigh
2006-02-13  4:00   ` [PATCH] powerpc: dont allow old RTC to be selected Anton Blanchard

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