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List:       moblin-dev
Subject:    Re: [Moblin Dev] Moblin kernel and PAE problem
From:       Arjan van de Ven <arjan () linux ! intel ! com>
Date:       2009-03-26 14:13:46
Message-ID: 49CB8D9A.2000305 () linux ! intel ! com
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Andreas Schildbach wrote:

Hi,

> I haven't found any issue tracker, so I'm reporting the issue here: The
> recent Moblin alpha2 is compiled with a PAE kernel ("physical address
> extension"). This makes it unbootable on at least some Pentium M's,
> which do not support PAE.

these same pentium M's do not have SSSE3 so Moblin is not going to work
on there anyway.
(and yes I have a laptop with such a pM.. and no I can't run Moblin on it)

> 
> Is PAE really needed? Do mobile devices really have more than 4 GB RAM?

PAE is needed for support for the Execute Disable (sometimes called NX) feature,
that gives programs a non-executable stack. This is one of the elements of the defenses
against buffer overflows... quite a relevant feature for devices that are highly
connected to the internet.

Greetings,
     Arjan van de Ven
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