Re: large page patch (fwd) (fwd)

From: Hubertus Franke (frankeh@watson.ibm.com)
Date: Tue Aug 06 2002 - 16:03:24 EST

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On Tuesday 06 August 2002 04:38 pm, Luck, Tony wrote:
> > > 4GB TLB entry size ???
> >
> > I assume you mean 4MB TLB entry size or did I fall
> > into a coma for 10 years
>
> That wasn't a typo ... Itanium2 supports page sizes up
> to 4 Gigabytes. Databases (well, Oracle for sure) want
> to use those huge TLB entries to map their multi-gigabyte
> shared memory areas.
>
> -Tony

Whooooowww... Power4 I believe opted out at 16MB.
So the story about sleeping beauty is true :-).

Wouldn't want to manage the 8-32 physical pages of memory through the VM.
Paging not an option, file access irrelevant.

In that case I agree that it should be handled by a special purpose
extension like Seth's patch to cover a 4GB page.

Upto 4MB or so I still believe going the other way is proper.
More later... thanks for the info.

-- 
-- Hubertus Franke  (frankeh@watson.ibm.com)
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