From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 18 Mar 2002 20:41:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 18 Mar 2002 20:41:31 -0500 Received: from pizda.ninka.net ([216.101.162.242]:53950 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Mon, 18 Mar 2002 20:41:28 -0500 Date: Mon, 18 Mar 2002 17:38:03 -0800 (PST) Message-Id: <20020318.173803.78092815.davem@redhat.com> To: aferber@techfak.uni-bielefeld.de Cc: torvalds@transmeta.com, Dieter.Nuetzel@hamburg.de, linux-kernel@vger.kernel.org Subject: Re: 7.52 second kernel compile From: "David S. Miller" In-Reply-To: <20020319023755.A28383@devcon.net> X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org From: Andreas Ferber Date: Tue, 19 Mar 2002 02:37:55 +0100 Erm, you forgot COW semantics. The accesses to buffer are actually all going to the same physical address. As CPU caches work on physical addresses AFAIK (everything else would be just stupid ;-), there are no cache misses (disregarding a few produced by IRQs/scheduling etc.). ROFL, ignore that part of my postings then :-)