From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265356AbTL2TL7 (ORCPT ); Mon, 29 Dec 2003 14:11:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265373AbTL2TL6 (ORCPT ); Mon, 29 Dec 2003 14:11:58 -0500 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:386 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id S265356AbTL2TK6 (ORCPT ); Mon, 29 Dec 2003 14:10:58 -0500 Message-ID: <3FF07C2F.6080408@pobox.com> Date: Mon, 29 Dec 2003 14:10:39 -0500 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030703 X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Sirotkin, Alexander" CC: linux-kernel@vger.kernel.org Subject: Re: network driver that uses skb destructor References: <3FF05C27.5030706@ti.com> In-Reply-To: <3FF05C27.5030706@ti.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Sirotkin, Alexander wrote: > I would like to write a network driver that uses DMA and manages it's > own memory. > > The most common approach (in RX) seem to be to allocate the memory for > DMA transfer using dev_alloc_skb(), get the HW DMA engine to transfer > the packet into this skb buffer and later free it using dev_kfree_skb(). > > For various reasons (mainly to support legacy source code) I would like > to allocate and free the buffer using my own functions. Theoretically, I > could get away by using skb->destructor. This won't work, since you cannot chain skb destructors... Jeff