From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 19 Oct 2001 08:31:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 19 Oct 2001 08:31:36 -0400 Received: from [195.246.135.25] ([195.246.135.25]:2308 "EHLO chert.194.133.98.200") by vger.kernel.org with ESMTP id ; Fri, 19 Oct 2001 08:31:18 -0400 Date: Fri, 19 Oct 2001 16:30:58 +0200 From: Andrei Lahun To: linux-kernel@vger.kernel.org Subject: problems with I/O performance with 2.4.12-ac3 Message-Id: <20011019163058.1bb7c6f7.uman@chert> X-Mailer: Sylpheed version 0.6.3 (GTK+ 1.2.10; i386-debian-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org hello. I did a bonnie++ tests with 2.4.13-pre3(+aa vm) and 2.4.12-ac3(+Rick patch). And i found that ac kernel have a big problems here. With linux kernel i got 22 Mb/c for read 19 for write and with ac 12 for read and 11 for write (both with ext2) If i used ext3 with ac kernel results little bit better. What is the reason for such regression in ac kernel ? And yes of course i had udma for both test. Andrei.