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, 28 Oct 2002 09:52:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 28 Oct 2002 09:52:06 -0500 Received: from ns.virtualhost.dk ([195.184.98.160]:25496 "EHLO virtualhost.dk") by vger.kernel.org with ESMTP id ; Mon, 28 Oct 2002 09:52:05 -0500 Date: Mon, 28 Oct 2002 15:55:33 +0100 From: Jens Axboe To: "David S. Miller" Cc: linux-kernel@vger.kernel.org, akpm@digeo.com Subject: Re: [patch][cft] zero-copy dma cd writing and ripping Message-ID: <20021028145533.GD2937@suse.de> References: <20021018155650.GJ15494@suse.de> <20021028.043507.104714061.davem@redhat.com> <20021028124240.GC872@suse.de> <1035816048.8970.1.camel@rth.ninka.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1035816048.8970.1.camel@rth.ninka.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 28 2002, David S. Miller wrote: > On Mon, 2002-10-28 at 04:42, Jens Axboe wrote: > > > This work reminds me that get_user_pages() (or it's callers) > > > need to be doing some flush_dcache_page() > > > > Was wondering about that. Can you tell me what it needs? And what about > > bio_unmap_user(), surely that needs to flush cache as well for reads? > > Documentation/cachetlb.txt describes where flush_dcache_page is needed. > If that doesn't describe it enough for you, that is a bug and please > tell me what part is confusing so I may make the document better. Didn't know about that document, will read it first. -- Jens Axboe