Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261623AbTISQ4b (ORCPT ); Fri, 19 Sep 2003 12:56:31 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261624AbTISQ4b (ORCPT ); Fri, 19 Sep 2003 12:56:31 -0400 Received: from fw.osdl.org ([65.172.181.6]:10132 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S261623AbTISQ4a (ORCPT ); Fri, 19 Sep 2003 12:56:30 -0400 Date: Fri, 19 Sep 2003 09:57:36 -0700 From: Andrew Morton To: Badari Pulavarty Cc: linux-kernel@vger.kernel.org, suparna@in.ibm.com Subject: Re: use O_DIRECT open file, when read will hang. Message-Id: <20030919095736.284aaa9f.akpm@osdl.org> In-Reply-To: <200309190939.18796.pbadari@us.ibm.com> References: <20030919124631.3b4e6301.hugang@soulinfo.com> <20030918225450.3d6bb72c.akpm@osdl.org> <200309190939.18796.pbadari@us.ibm.com> X-Mailer: Sylpheed version 0.9.4 (GTK+ 1.2.10; i686-pc-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 Content-Length: 869 Lines: 27 Badari Pulavarty wrote: > > I am also seeing some kind of regression on raw in 2.6.0-test5-mm2. What is "some kind of regression"? > Unfortunately, this happens only with huge database benchmarks. > I still haven't narrowed it down. Use mm3 - it has fixes. Daniel McNeil reports that mm3 fixes the dbt2 problems he was seeing. > > - can I do fsx, rawiobench on NFS files to test DIO on NFS ? Probably, but it will deadlock immediately. All the i_sem and i_alloc_sem rework needs to be pushed down to the blockdev_direct_IO level. That means reverting O_DIRECT-race-fixes-fixes-2.patch first. - 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/