Re: Is there anyway to use 4M pages on x86 linux in user level?

[Brian Gerst]

DervishD wrote:
> 
>     Hi Brian :)
> 
> >The large page size is 4MB, except in PAE mode where they are 2MB.
> >Normal pages are always 4KB.  Noting in the GDT affects the page
> >size.
> 
>     The entries in the GDT, do not set the page size for that
> descriptor? I'm certainly rusted on the i386 O:)))
> 
>     Raúl

No, there is a bit in the page directory that determines if the entry
points to a page table (with 4KB pages) or to a 4MB page.  The GDT is
only used for segmentation, which is totally seperate from paging.

--

				Brian Gerst