From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from the-village.bc.nu (lightning.swansea.uk.linux.org [194.168.151.1]) by kvack.org (8.8.7/8.8.7) with ESMTP id RAA03077 for ; Thu, 27 May 1999 17:17:02 -0400 Subject: Re: Q: PAGE_CACHE_SIZE? Date: Thu, 27 May 1999 23:06:48 +0100 (BST) In-Reply-To: from "Rik van Riel" at May 25, 99 10:16:34 pm Content-Type: text Message-Id: From: Alan Cox Sender: owner-linux-mm@kvack.org To: Rik van Riel Cc: alan@lxorguk.ukuu.org.uk, ak@muc.de, ebiederm+eric@ccr.net, linux-kernel@vger.rutgers.edu, linux-mm@kvack.org List-ID: > 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm my@address' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://humbolt.geo.uu.nl/Linux-MM/