Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261896AbTIEBIS (ORCPT ); Thu, 4 Sep 2003 21:08:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261909AbTIEBIS (ORCPT ); Thu, 4 Sep 2003 21:08:18 -0400 Received: from pc1-cwma1-5-cust4.swan.cable.ntl.com ([80.5.120.4]:33499 "EHLO dhcp23.swansea.linux.org.uk") by vger.kernel.org with ESMTP id S261896AbTIEBIR (ORCPT ); Thu, 4 Sep 2003 21:08:17 -0400 Subject: Re: [PATCH] fix remap of shared read only mappings From: Alan Cox To: Linus Torvalds Cc: Daniel Phillips , James Bottomley , Jamie Lokier , Linux Kernel Mailing List In-Reply-To: References: Content-Type: text/plain Content-Transfer-Encoding: 7bit Message-Id: <1062724028.23305.14.camel@dhcp23.swansea.linux.org.uk> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.4.4 (1.4.4-4) Date: Fri, 05 Sep 2003 02:07:09 +0100 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 780 Lines: 18 On Gwe, 2003-09-05 at 01:49, Linus Torvalds wrote: > What really matters is that mmap() under Linux is 100% coherent, as far as > the hardware just allows. We haven't taken the easy way out. We shouldn't > start now. NFS ? The problem with OpenGFS is that it is a network file system so implementing "perfect" shared mmap semantics might actually reduce it from handy to useless. Right now the worst we have to do is mark pages uncached in some weird shared map cases, with pages being bounced across firewire its a bit different. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/