From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263769AbTDITtB (for ); Wed, 9 Apr 2003 15:49:01 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263742AbTDITtB (for ); Wed, 9 Apr 2003 15:49:01 -0400 Received: from inet-mail3.oracle.com ([148.87.2.203]:47803 "EHLO inet-mail3.oracle.com") by vger.kernel.org with ESMTP id S263769AbTDITtA (for ); Wed, 9 Apr 2003 15:49:00 -0400 Date: Wed, 9 Apr 2003 10:59:14 -0700 From: Joel Becker To: Rob van Nieuwkerk Cc: linux-kernel@vger.kernel.org Subject: Re: O_DIRECT alignment requirements ? Message-ID: <20030409175908.GB31739@ca-server1.us.oracle.com> References: <20030409154836.GA31739@ca-server1.us.oracle.com> <200304091653.h39GrHR05341@verdi.et.tudelft.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200304091653.h39GrHR05341@verdi.et.tudelft.nl> X-Burt-Line: Trees are cool. User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 09, 2003 at 06:53:17PM +0200, Rob van Nieuwkerk wrote: > I get 4096 with BLKBSZGET on several unmounted partitions on my system > (RH 2.4.18-27.7.x kernel). Some give 1024 .. Maybe it is because I > had them mounted first and unmounted them for the test ? That would be the most likely answer. When you unmount, I don't believe the filesystem bothers to set_blocksize(get_hardsect_size(dev)). Joel -- Life's Little Instruction Book #94 "Make it a habit to do nice things for people who will never find out." Joel Becker Senior Member of Technical Staff Oracle Corporation E-mail: joel.becker@oracle.com Phone: (650) 506-8127