From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763392AbXGPOXj (ORCPT ); Mon, 16 Jul 2007 10:23:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1765939AbXGPOXV (ORCPT ); Mon, 16 Jul 2007 10:23:21 -0400 Received: from agminet01.oracle.com ([141.146.126.228]:12551 "EHLO agminet01.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758126AbXGPOXT (ORCPT ); Mon, 16 Jul 2007 10:23:19 -0400 To: "John Stoffel" Cc: Jens Axboe , linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org Subject: Re: [PATCH 00/33] SG table chaining support From: "Martin K. Petersen" Organization: Oracle References: <11845792671245-git-send-email-jens.axboe@oracle.com> <18075.31515.974905.507754@stoffel.org> Date: Mon, 16 Jul 2007 10:23:10 -0400 In-Reply-To: <18075.31515.974905.507754@stoffel.org> (John Stoffel's message of "Mon, 16 Jul 2007 10:05:15 -0400") Message-ID: User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Brightmail-Tracker: AAAAAQAAAAI= X-Brightmail-Tracker: AAAAAQAAAAI= X-Whitelist: TRUE X-Whitelist: TRUE Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org >>>>> "John" == John Stoffel writes: John> Will this help out tape drive performance at all? I looked John> through the patches quickly, esp the AIC7xxx stuff since that's John> what I use, but nothing jumped out at me... Yes. Most modern tape drives want a block size of 1MB or higher. With the old stack we'd be stuck at 512KB because the sg limitations caused us to come just short of 1MB... -- Martin K. Petersen Oracle Linux Engineering