From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benny Halevy Subject: Re: [RFC 1/6] bidi support: request dma_data_direction Date: Mon, 22 Jan 2007 08:06:50 +0200 Message-ID: <45B4547A.3020105@panasas.com> References: <45B3F578.7090109@panasas.com> <45B40458.9010107@torque.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from gw-e.panasas.com ([65.194.124.178]:53698 "EHLO cassoulet.panasas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750804AbXAVGIN (ORCPT ); Mon, 22 Jan 2007 01:08:13 -0500 In-Reply-To: <45B40458.9010107@torque.net> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: dougg@torque.net Cc: Boaz Harrosh , Jens Axboe , Christoph Hellwig , Mike Christie , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, open-iscsi@googlegroups.com, Daniel.E.Messinger@seagate.com, Liran Schour Douglas Gilbert wrote: > Boaz Harrosh wrote: >> - Introduce a new enum dma_data_direction data_dir member in struct request. >> and remove the RW bit from request->cmd_flag >> - Add new API to query request direction. >> - Adjust existing API and implementation. >> - Cleanup wrong use of DMA_BIDIRECTIONAL >> - Introduce new blk_rq_init_unqueued_req() and use it in places ad-hoc >> requests were used and bzero'ed. > > With a bi-directional transfer is it always unambiguous > which transfer occurs first (or could they occur at > the same time)? The bidi transfers can occur in any order and in parallel. > > Doug Gilbert > - > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html