linux-kernel - Re: Linux 2.6.25

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Date:	Fri, 18 Apr 2008 22:24:53 +0200
From:	Jiri Slaby <jirislaby@...il.com>
To:	Bart Van Assche <bart.vanassche@...il.com>
CC:	Matthew <jackdachef@...il.com>, torvalds@...ux-foundation.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Rudolf Marek <r.marek@...embler.cz>,
	Gene Heskett <gene.heskett@...il.com>
Subject: Re: Linux 2.6.25

On 04/18/2008 09:18 PM, Bart Van Assche wrote:
> On Fri, Apr 18, 2008 at 5:37 PM, Matthew <jackdachef@...il.com> wrote:
>>  I've another "regression" to report for 2.6.25:
>>
>>  it's concerning much higher temperatures being read out by the
>>  "coretemp" kernel-module in comparison to 2.6.24* series
>>
>>  e.g. where temperatures were around 40-47°C they are now constantly
>>  jumping around 55-70°C (even in idle !)
> 
> The coretemp kernel module reports 25°C on my PC when idle, and 34°C
> after having performed some computations (lmbench2). This looks
> normal. This test has been performed with a vanilla 2.6.25 kernel and
> a Core 2 Duo E6750 CPU (Asus motherboard). The 2.6.22 and 2.6.24
> kernels report an incorrect temperature on the same system however
> (10°C). So there is either an issue with the patches that have been
> applied to your kernel or the behavior of the coretemp module for the
> 6600 and E6750 CPU's is different. Can you repeat the test with a
> vanilla 2.6.25 kernel ?
> 
> (Added Rudolf Marek in CC, the coretemp author.)

I see a change on my rrd graphs on Mar 5th 11:30 AM (from 25 to 40 average 
centigrades). This is when I booted 2.6.25-rc3-mm1 instead of 2.6.25-rc2-mm1, 
according to logs. [I have no idea whether the values were correct before or are 
correct now.]

I might bisect it, if needed.
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