From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 28 Aug 2001 08:16:45 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 28 Aug 2001 08:16:35 -0400 Received: from smtpde02.sap-ag.de ([194.39.131.53]:64386 "EHLO smtpde02.sap-ag.de") by vger.kernel.org with ESMTP id ; Tue, 28 Aug 2001 08:16:31 -0400 From: Christoph Rohland To: Jens Axboe Cc: Linux Kernel , "David S. Miller" Subject: Re: [patch] zero-bounce block highmem I/O, #13 In-Reply-To: <20010827123700.B1092@suse.de> <20010828125520.L642@suse.de> <20010828134141.M642@suse.de> Organisation: SAP LinuxLab Date: 28 Aug 2001 14:16:11 +0200 In-Reply-To: <20010828134141.M642@suse.de> Message-ID: User-Agent: Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.1 (Cuyahoga Valley) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-SAP: out X-SAP: out Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi Jens, On Tue, 28 Aug 2001, Jens Axboe wrote: > Ok found the bug -- SCSI was accidentally using blk_seg_merge_ok > when it just wanted to test if we were crossing a 4GB physical > address boundary or not. Doh! Attached incremental patch should fix > the SCSI performance issue. I'm testing right now... Yup, performance is back to 2.4.9 level. But I do not see an improvement. I will now do a database import. Greetings Christoph