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Re: [PATCH] 64K page size

To: Jonathan Day <imipak@yahoo.com>
Subject: Re: [PATCH] 64K page size
From: Thiemo Seufer <ths@networkno.de>
Date: Wed, 23 Aug 2006 18:53:55 +0100
Cc: Peter Watkins <treestem@gmail.com>, linux-mips@linux-mips.org, Ralf Baechle <ralf@linux-mips.org>
In-reply-to: <20060823162324.43027.qmail@web31507.mail.mud.yahoo.com>
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References: <20060823160011.GE20395@networkno.de> <20060823162324.43027.qmail@web31507.mail.mud.yahoo.com>
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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.)

Biggest drawback (besides stability concerns and some broken userspace
programs) is the insane amount of memory it can take. Every tiny file
would currently take 64k in the page cache. There's some work going on
to collate such partially used pages into single ones, but that may
take a while to become usable.


Thiemo

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