From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 30 May 2001 11:38:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 30 May 2001 11:38:38 -0400 Received: from t2.redhat.com ([199.183.24.243]:4084 "EHLO passion.cambridge.redhat.com") by vger.kernel.org with ESMTP id ; Wed, 30 May 2001 11:38:26 -0400 X-Mailer: exmh version 2.3 01/15/2001 with nmh-1.0.4 From: David Woodhouse X-Accept-Language: en_GB In-Reply-To: <593aht81ed3p199mr0l1m896d32bgr6qnv@4ax.com> In-Reply-To: <593aht81ed3p199mr0l1m896d32bgr6qnv@4ax.com> To: William Waddington Cc: linux-kernel@vger.kernel.org Subject: Re: query regarding 'map_user_kiobuf' Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 30 May 2001 16:37:50 +0100 Message-ID: <14179.991237070@redhat.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org csbwaddington@att.net said: > I have a couple of user DMA drivers up and running, but in light of > your comment, I am not so sure. I'm sorry, it seems I lied. Although map_user_kiobuf in 2.2 used to lock the pages, apparently that's no longer necessary. You just need to make sure they're marked dirty before you unmap the kiobuf. -- dwmw2