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Re: [PATCH] 64K page size

To: Jonathan Day <imipak@yahoo.com>
Subject: Re: [PATCH] 64K page size
From: Ralf Baechle <ralf@linux-mips.org>
Date: Fri, 25 Aug 2006 01:28:11 +0100
Cc: Thiemo Seufer <ths@networkno.de>, Peter Watkins <treestem@gmail.com>, linux-mips@linux-mips.org
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On Wed, Aug 23, 2006 at 09:23:24AM -0700, Jonathan Day wrote:

> I am extremely interested in big pages (64K, etc), and
> the sooner the better. If there is anything not
> considered OK for immediate inclusion in the Linux
> MIPS git tree, I would love to have a copy anyway.
> Large pages will be necessary for some high-priority
> work I'm doing, although stability at this point seems
> to be an optional extra. (Hence why the patches are
> much more important than whether they're actually
> finished yet.)

64K pages are not the universal solution to world hunger.  They're a
tradeoff and usually one that is considered apropriate for full blown
supercomputers.  On smaller systems the memory overhead is likely to be
prohibitive.  The memory overhead problem is being worked on but it's
likely to be quite some time before this is finished and integrated.

Do we want to get them to work?  Of course, Linux/MIPS supports some
extremly large systems.  But aside of those 64K pagesize is rarely useful.

  Ralf

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