linux-kernel - Re: [PATCH] Remove Barcelona Thermal Throttling

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Date:	Sun, 3 Feb 2008 22:39:03 -0800
From:	"Russell Leidich" <rml@...gle.com>
To:	"Andi Kleen" <andi@...stfloor.org>,
	"Torsten Kaiser" <just.for.lkml@...glemail.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	"Thomas Gleixner" <tglx@...utronix.de>,
	"Ingo Molnar" <mingo@...e.hu>, valdis.kletnieks@...edu
Subject: Re: [PATCH] Remove Barcelona Thermal Throttling

P.S. This patch also moves the responsibility for enabling hardware
thermal control from the OS to the BIOS.

On Feb 3, 2008 10:13 PM, Russell Leidich <rml@...gle.com> wrote:
> All,
>
> You can imagine my dismay when I recently learned that, after all our
> collective effort, hardware thermal throttling does not work reliably
> on Barcelona, according to AMD.  Due to NDA restrictions, I am unable
> to provide further details.
>
> But the effort has not been a waste; whenever AMD manages to make a
> reliable hardware thermal sensor, this code should "just work" along
> with all the other northbridge initialization associated with the
> device IDs in k8_northbridges[].
>
> This patch Blacklists Barcelona as non-hardware-thermal-throttlable
> (in addition to RevF, which was already blacklisted).  On the
> recommendation of my colleagues, it also contains these politeness
> enhancements: (1) warns the user if the CPU is _not_ blacklisted, but
> the BIOS neglected to enable thermal throttling (as a safety measure)
> and (2) uses the PCI_SLOT macro instead of the more obnoxious
> shift-right-by-3 to compute PCI device numbers.
>
> This patch assumes that it is being applied _after_ my previous patch
> has already been integrated.  I mailed out that patch on 1/17/2008
> with subject "Re: [PATCH] AMD Thermal Interrupt Support".
> --
> Russell Leidich
>



-- 
Russell Leidich
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