Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265248AbTFMIPx (ORCPT ); Fri, 13 Jun 2003 04:15:53 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265251AbTFMIPx (ORCPT ); Fri, 13 Jun 2003 04:15:53 -0400 Received: from nat-pool-rdu.redhat.com ([66.187.233.200]:343 "EHLO devserv.devel.redhat.com") by vger.kernel.org with ESMTP id S265248AbTFMIPN (ORCPT ); Fri, 13 Jun 2003 04:15:13 -0400 Date: Fri, 13 Jun 2003 08:28:57 +0000 From: Arjan van de Ven To: Rob van Nieuwkerk Cc: Arjan van de Ven , Andries Brouwer , Alan Cox , linux-kernel@vger.kernel.org Subject: Re: open(.. O_DIRECT ..) difference in between Linux and FreeBSD .. Message-ID: <20030613082857.G30329@devserv.devel.redhat.com> References: <200306130827.h5D8RrJ5004185@verdi.et.tudelft.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i In-Reply-To: <200306130827.h5D8RrJ5004185@verdi.et.tudelft.nl>; from robn@verdi.et.tudelft.nl on Fri, Jun 13, 2003 at 10:27:52AM +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 970 Lines: 24 On Fri, Jun 13, 2003 at 10:27:52AM +0200, Rob van Nieuwkerk wrote: > > Arjan van de Ven wrote: > > On Fri, Jun 13, 2003 at 01:12:57AM +0200, Rob van Nieuwkerk wrote: > > > FYI: > > > It appears that somewhere between RH kernels 2.4.18-27.7.x and 2.4.20-18.9 > > > something has changed so that my application needs a O_SYNC too besides > > > the O_DIRECT to make sure that writes will be synchronous. If I leave > > > the O_SYNC out with 2.4.20-18.9 the write will happen physically 35 > > > seconds after the write() was done. > > > > O_DIRECT is nothing but a hint and the 2.4.20-18.9 kernel decides to not > > honor it > > Hi Arjan, > > Do you mean that the 2.4.20-18.9 kernel always ignores the O_DIRECT flag ? yes. - 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/