linux-kernel - Re: patch disabling use of PSE on Atom CPUs with a certain erratum

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Message-ID: <4CADE2F3.8000908@zytor.com>
Date:	Thu, 07 Oct 2010 08:10:43 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jan Beulich <JBeulich@...ell.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: patch disabling use of PSE on Atom CPUs with a certain	 erratum

On 10/07/2010 07:52 AM, Jan Beulich wrote:
>>>> On 07.10.10 at 16:08, "H. Peter Anvin" <hpa@...or.com> wrote:
>> On 10/07/2010 07:01 AM, Jan Beulich wrote:
>>>>
>>>> Those Atoms don't have 64-bit support.
>>>
>>> That's different from what I found looking around on the web.
>>>
>>
>> Do tell...
> 
> E.g.
> 
> http://en.wikipedia.org/wiki/List_of_Intel_Atom_microprocessors
> 
> in particular the Atom 230 and Atom 330 (which to my reading match
> the spec updates for the 200 and 300 series, which in turn exhibit
> the erratum in question).
> 

You're right... I misremembered.  The question is what to do at this
point, since we're already in trouble.  A possible failure on startup
seems better than a state in which we could get data corruption at
almost any time.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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