From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 1 Apr 2003 22:07:18 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 1 Apr 2003 22:07:18 -0500 Received: from web20005.mail.yahoo.com ([216.136.225.68]:56651 "HELO web20005.mail.yahoo.com") by vger.kernel.org with SMTP id ; Tue, 1 Apr 2003 22:07:16 -0500 Message-ID: <20030402031840.60077.qmail@web20005.mail.yahoo.com> Date: Tue, 1 Apr 2003 19:18:40 -0800 (PST) From: Kenny Simpson Subject: Re: mmap-related questions To: Benjamin LaHaise Cc: linux-kernel@vger.kernel.org In-Reply-To: <20030401125020.E25225@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --- Benjamin LaHaise wrote: > the act of unmapping them transfers the > dirty bit from the page > tables into the page cache where fsync() acts on > them. > Should this info be included with Mel Gorman's excellent doc: http://www.csn.ul.ie/~mel/projects/vm/guide/html/understand/node31.html#SECTION009411000000000000000 Or is it there, but I missed it? > The > one case this breaks down > on is when the mmap()'d file is on NFS -- the > reordering there can result in > writebacks from mmap()s occuring in unexpected ways. I sometimes wish mmap was not supported on NFS, or at least require a special MAP_NFS flag be used. It has caused lots of pain over the years. Thanks again for this info, it has helped greatly! -Kenny __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - File online, calculators, forms, and more http://tax.yahoo.com