Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 1 Feb 2002 15:45:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 1 Feb 2002 15:45:14 -0500 Received: from parcelfarce.linux.theplanet.co.uk ([195.92.249.252]:17156 "EHLO www.linux.org.uk") by vger.kernel.org with ESMTP id ; Fri, 1 Feb 2002 15:45:01 -0500 Message-ID: <3C5AFE2D.95A3C02E@zip.com.au> Date: Fri, 01 Feb 2002 12:44:29 -0800 From: Andrew Morton X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.4.18-pre7 i686) X-Accept-Language: en MIME-Version: 1.0 To: Ricardo Galli CC: linux-kernel@vger.kernel.org Subject: Re: O_DIRECT fails in some kernel and FS In-Reply-To: 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 Ricardo Galli wrote: > > After some comments from Oliver Diedrich (editor of heise.de), which told me > he couldn't make O_DIRECT work on 2.4.17, I tried with different versions and > file systems: > > This is the result: > > 2.4.14 - Ext[23] - redhat7.2 glibs: OK (at least the bytes are written) > 2.4.17 - ReiserFS - Debian Sid : FAILS (0 bytes file, write returns -1) > 2.4.17 - Ext2 - Debian Woody : OK (bytes written) > 2.4.17 - Ext3 - Debian Woody : FAILS (0 bytes file, write returns -1) > > Oliver Diedrich also told he could make work O_DIRECT with ext3 and 2.4.17. > > Is this normal? Does it really work on 2.4.14? Or it doesn't but the kernel > doesn't avoid caching? > ext2 is the only filesystem which has O_DIRECT support. - - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/