Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 1 Feb 2002 15:37:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 1 Feb 2002 15:37:18 -0500 Received: from atlante.atlas-iap.es ([194.224.1.3]:25865 "EHLO atlante.atlas-iap.es") by vger.kernel.org with ESMTP id ; Fri, 1 Feb 2002 15:37:08 -0500 Content-Type: text/plain; charset=US-ASCII From: Ricardo Galli Organization: UIB To: linux-kernel@vger.kernel.org Subject: O_DIRECT fails in some kernel and FS Date: Fri, 1 Feb 2002 21:37:05 +0100 X-Mailer: KMail [version 1.3.2] MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 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? Funny behaviour... Regards, -- ricardo "I just stopped using Windows and now you tell me to use Mirrors?" - said Aunt Tillie, just before downloading 2.5.3 kernel. - 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/