linux-kernel - Re: Linux 2.6.29-rc6

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Message-ID: <49BD5CB6.1030700@krogh.cc>
Date:	Sun, 15 Mar 2009 20:53:26 +0100
From:	Jesper Krogh <jesper@...gh.cc>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	john stultz <johnstul@...ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Len Brown <len.brown@...el.com>, Ingo Molnar <mingo@...e.hu>
Subject: Re: Linux 2.6.29-rc6

Thomas Gleixner wrote:

> slow calibration path on every boot on your machine.
> 
>     (tscmax - tscmin) / avg = 0.064 (result from third run)
> 
> On my test machines I get values below 0.02
> 
> While it's statistically not really correct we still can use that info
> to catch cases like we see on your machines.
> 
>> While booting up I saw this one on the serial console..
>> root@...d12:~# hwclock --systohc
>> Cannot access the Hardware Clock via any known method.
>> Use the --debug option to see the details of our search for an access method.
>> root@...d12:~# hwclock --systohc --debug
>> hwclock from util-linux-ng 2.13.1
>> hwclock: Open of /dev/rtc failed, errno=2: No such file or directory.
>> No usable clock interface found.
>> Cannot access the Hardware Clock via any known method.
> 
> Can you provide your .config file please ?

http://krogh.cc/~jesper/config-2.6.29-rc8.txt

I testet the attached patch.. and after 1.5 hours it seems to work. I'll 
remain on this one at least a day to see how it works. I'll keep it on 
for now and report back in 24 hours or so.

Its still using tsc as clock-source.

Jesper

-- 
Jesper
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