[haiku-development] [Re] 64 bit physical addresses
- From: Romain <romain.haiku@xxxxxxxxxxx>
- To: Haiku development <haiku-development@xxxxxxxxxxxxx>
- Date: Tue, 22 Jun 2010 17:53:24 +0200
>Finally I want to ask what everyone thinks about enabling PAE support.
> IMO it would be nice, but it's not really a must-have feature, as the
>additional memory beyond the 3.x GB that should always be accessible
>(mostly depending on the gfx memory) probably won't be used for
>anything but caching, anyway. An advantage would be that our drivers
>would already get a bit of 64 bit exposure.
A benefit of PAE on 32bit systems is that it make the XD (eXecution
Disable) bit available.
This would allow to protect from stack overflows, and add a B_EXECUTE_AREA
flag to the area protection flags.
Romain.
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