From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kanoj Sarcar Message-Id: <200102270547.VAA94414@google.engr.sgi.com> Subject: Re: 2.5 page cache improvement idea Date: Mon, 26 Feb 2001 21:47:25 -0800 (PST) In-Reply-To: <200102270326.f1R3QII16835@eng1.sequent.com> from "Gerrit Huizenga" at Feb 26, 2001 07:26:18 PM MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: gerrit@us.ibm.com Cc: Ben LaHaise , Chuck Lever , linux-mm@kvack.org List-ID: > node traffic is relatively expensive. As a result, wasting a small > number of physical pages on duplicate read-only pages cuts down node > to node traffic in most cases. Many NUMA systems have a cache for > remote memory (some cache only remote pages, some cache local and remote > pages in the same cache - icky but cheaper). As that cache cycles, > it is cheaper to replace read-only text pages from the local node > rather than the remote. So, for things like kernel text (e.g. one of > the SGI patches) and for glibc's text, as well as the text of other The mips64 port onto SGI o2000 uses kernel text replication, that has been part of 2.3/2.4 for a long time now. Is there another patch you are talking about here? Kanoj -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux.eu.org/Linux-MM/