linux-kernel - Re: [lm-sensors] [PATCH 0/2] hwmon: Update coretemp to current Intel processors

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Date:	Tue, 18 May 2010 09:13:07 +0200
From:	Carsten Emde <C.Emde@...dl.org>
To:	Dmitry Gromov <gromovd@...il.com>
CC:	"Wan, Huaxu" <huaxu.wan@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	LM Sensors <lm-sensors@...sensors.org>
Subject: Re: [lm-sensors] [PATCH 0/2] hwmon: Update coretemp to current Intel
 	processors

On 05/18/2010 08:45 AM, Dmitry Gromov wrote:
> On Tue, May 18, 2010 at 01:07, Wan, Huaxu<huaxu.wan@...el.com>  wrote:
>> The TjMax of N270 is 90C, according the official documents [1][2].
>> [1] http://ark.intel.com/Product.aspx?id=36331&processor=N270&spec-codes=SLB73
>> [2] http://download.intel.com/design/processor/datashts/319977.pdf
>> Thank you, this is exactly why I'm asking. I think, "guessing" values here
> can be dangerous - who knows what critical apps they will relied upon.
Yes, of course. I never wanted to use a guessed and not documented
value. I only wanted the temperature reading to be plausible.

> And 90C seems to be good for N200 series of Atom CPUs only - I could not
> find TjMax value published for N330 Dual Core  (quite popular one). Intel
> only published Tcase for it:
> http://ark.intel.com/Product.aspx?id=35641
> So, if for N270 Tcase = TjMax = 90C, then, I'd suggest to use Tcase = 85.2C
> for N330 TjMax value.
They have the same CPU model ID:

# grep model /proc/cpuinfo
model		: 28
model name	: Intel(R) Atom(TM) CPU N270   @ 1.60GHz

# grep model /proc/cpuinfo
model		: 28
model name	: Intel(R) Atom(TM) CPU  330   @ 1.60GHz

I would like to propose to use the patch as it is. It's the best
version we ever had.

	Carsten.
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