From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Rik van Riel <riel@nl.linux.org>
Cc: alan@lxorguk.ukuu.org.uk, ak@muc.de, ebiederm+eric@ccr.net,
linux-kernel@vger.rutgers.edu, linux-mm@kvack.org
Subject: Re: Q: PAGE_CACHE_SIZE?
Date: Thu, 27 May 1999 23:06:48 +0100 (BST) [thread overview]
Message-ID: <E10n8Ic-0003h9-00@the-village.bc.nu> (raw)
In-Reply-To: <Pine.LNX.4.03.9905252213400.25857-100000@mirkwood.nl.linux.org> from "Rik van Riel" at May 25, 99 10:16:34 pm
> A larger page size is no compensation for the lack of a decent
> read-{ahead,back,anywhere} I/O clustering algorithm in the OS.
It isnt compensating for that. If you have 4Gig of memory and a high performance
I/O controller the constant cost per page for VM management begins to dominate
the equation. Its also a win for other CPU related reasons (reduced tlb
misses and the like), and with 4Gig of RAM the argument is a larger page
size isnt a problem.
Alan
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next prev parent reply other threads:[~1999-05-27 21:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-05-18 14:03 Eric W. Biederman
1999-05-18 15:04 ` Andi Kleen
1999-05-19 23:29 ` Chris Wedgwood
1999-05-20 17:12 ` Andrea Arcangeli
1999-05-25 16:29 ` Alan Cox
1999-05-25 20:16 ` Rik van Riel
1999-05-25 22:17 ` Matti Aarnio
1999-05-27 22:06 ` Alan Cox [this message]
1999-05-28 20:46 ` Stephen C. Tweedie
1999-05-28 21:33 ` Rik van Riel
1999-05-29 1:59 ` Stephen C. Tweedie
1999-05-30 23:12 ` Andrea Arcangeli
1999-06-01 0:01 ` Stephen C. Tweedie
1999-06-01 14:23 ` Andrea Arcangeli
1999-05-29 15:07 ` Ralf Baechle
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