Re: [X86] Re: x86 SIG / Dropping PAE support

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On 19 September 2017 at 01:08, Florian Weimer <fweimer@xxxxxxxxxx> wrote:
> On 09/19/2017 12:41 AM, Jeff Backus wrote:
>>
>> On Mon, Sep 18, 2017 at 8:54 AM, Florian Weimer <fweimer@xxxxxxxxxx>
>> wrote:
>>>
>>> On 09/17/2017 06:30 PM, Jeff Backus wrote:
>>>
>>>> Also, I wanted to let you know that we have decided to drop PAE support.
>>>
>>>
>>>
>>> Does this disable direct NX support, too?
>>>
>>> Thanks,
>>> Florian
>>
>>
>> Hmm.... Good question. Looks like it. I'm not very familiar with the
>> no-execute stuff, but yes, I do believe it requires PAE.
>
>
> Isn't this a rather significant feature regression?
>

Argh. This is an oversight on my part when bringing this as an option
from the kernel team. I was not aware that the NX was dependent on
PAE. The primary hardware that people were wanting all seemed to be
below 4 GB so having PAE didn't seem to be worth the overhead. I am
not sure if the OLPC desktops even have support for either NX or PAE.
The people with P-III or no SSE2 definitely don't have PAE.


-- 
Stephen J Smoogen.

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