Re: 4MB pages and framebuffer access, x11perf results, 2.1.125

Alan Cox (alan@lxorguk.ukuu.org.uk)
Thu, 29 Oct 1998 18:44:43 +0000 (GMT)

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> the new 36-bit physical extensions. The only way to access the high memory
> is through a 4MB mapping (unless you want to go to the three-level page
> tables that slow everything else down), and it's really only useful for
> database caches.

There are quite a few applications of 8Gig of RAM beyond database caches.
Has anyone (intel or otherwise) actually quantified the impact of 3 level
page tables. The xeon document extensions don't seem to provide much
information on this, or on the impact of using 2 or 3 layer tables according
to process type

Alan

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