linux-kernel - RE: [Patch v2] Implement thermal limiting in the generic thermal class

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Date:	Wed, 18 Jun 2008 17:28:01 +0800
From:	"Zhang, Rui" <rui.zhang@...el.com>
To:	"Pavel Machek" <pavel@...e.cz>,
	"Matthew Garrett" <mjg59@...f.ucam.org>
Cc:	<linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<trenn@...e.de>
Subject: RE: [Patch v2] Implement thermal limiting in the generic thermal class

One thing I'm concerning is that if we could enable polling in Linux.
Bug #8842 shows that polling may break some laptops.
And we have known that windows never enable polling.
Although this patch will not break the laptop in #8842, it still may
bring some potential risks if we enable polling in Linux.
IMO, a dmi entry would be much more acceptable...

Thanks,
rui

>-----Original Message-----
>From: Pavel Machek [mailto:pavel@...e.cz]
>Sent: Wednesday, June 18, 2008 2:54 AM
>To: Matthew Garrett
>Cc: Zhang, Rui; linux-acpi@...r.kernel.org;
linux-kernel@...r.kernel.org
>Subject: Re: [Patch v2] Implement thermal limiting in the generic
thermal class
>
>Hi!
>
>> In the absence of an explicitly defined passive cooling zone any
>> machine unable to manage its thermal profile through active cooling
will
>> reach its critical shutdown temperature and power off, resulting in
>> potential data loss. Add support to the generic thermal class for
>> initiating passive cooling at a temperature defaulting to just below
the
>> critical temperature, with this value being overridable by the admin
via
>> sysfs.
>
>This means we get two copies of passive cooling code: one generic, and
>one in acpi. Can we make sure we have just one of them?
>
>--
>(english) http://www.livejournal.com/~pavelmachek
>(cesky, pictures)
>http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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