linux-kernel - Re: Linux 2.6.29-rc6

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Date:	Thu, 26 Feb 2009 20:55:11 +0100
From:	Jesper Krogh <jesper@...gh.cc>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Linux 2.6.29-rc6

2.6.29-rc6 seems to have trouble running ntpd reliable under load. My 
nagios system has just alerted me of drifting time on the machine upgraded.

Feb 26 19:09:25 quad12 ntpd[4901]: synchronized to LOCAL(0), stratum 13
Feb 26 19:10:31 quad12 ntpd[4901]: synchronized to 10.194.133.12, stratum 4
Feb 26 19:25:21 quad12 ntpd[4901]: time reset -0.915488 s
Feb 26 19:29:11 quad12 ntpd[4901]: synchronized to LOCAL(0), stratum 13
Feb 26 19:31:21 quad12 ntpd[4901]: synchronized to 10.194.133.13, stratum 4
Feb 26 19:34:37 quad12 ntpd[4901]: synchronized to 10.194.133.12, stratum 4
Feb 26 19:37:53 quad12 ntpd[4901]: synchronized to 10.194.133.13, stratum 4
Feb 26 19:46:27 quad12 ntpd[4901]: synchronized to 10.194.133.12, stratum 4
Feb 26 19:46:27 quad12 ntpd[4901]: time reset -0.961386 s
Feb 26 19:50:30 quad12 ntpd[4901]: synchronized to LOCAL(0), stratum 13
Feb 26 19:51:34 quad12 ntpd[4901]: synchronized to 10.194.133.12, stratum 4
Feb 26 20:01:55 quad12 ntpd[4901]: synchronized to 10.194.133.13, stratum 4
Feb 26 20:06:18 quad12 ntpd[4901]: time reset -0.979177 s
Feb 26 20:10:15 quad12 ntpd[4901]: synchronized to LOCAL(0), stratum 13
Feb 26 20:11:21 quad12 ntpd[4901]: synchronized to 10.194.133.13, stratum 4
Feb 26 20:14:52 quad12 ntpd[4901]: synchronized to 10.194.133.12, stratum 4
Feb 26 20:19:10 quad12 ntpd[4901]: synchronized to 10.194.133.13, stratum 4
Feb 26 20:26:00 quad12 ntpd[4901]: time reset -0.923268 s
Feb 26 20:30:01 quad12 ntpd[4901]: synchronized to LOCAL(0), stratum 13
Feb 26 20:30:30 quad12 ntpd[4901]: synchronized to 10.194.133.13, stratum 4
Feb 26 20:45:36 quad12 ntpd[4901]: time reset -0.919609 s
Feb 26 20:49:49 quad12 ntpd[4901]: synchronized to LOCAL(0), stratum 13

2.6.26.8 doesnt have this problem.

The "current_clocsource" is the same on both systems.

$ cat /sys/devices/system/clocksource/clocksource0/current_clocksource
tsc


-- 
Jesper
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