Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755679Ab0DNO1T (ORCPT ); Wed, 14 Apr 2010 10:27:19 -0400 Received: from acsinet12.oracle.com ([141.146.126.234]:48836 "EHLO acsinet12.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755323Ab0DNO1R (ORCPT ); Wed, 14 Apr 2010 10:27:17 -0400 To: Andrew Morton Cc: "Frank Ren" , "mingo" , "a.p.zijlstra" , "jens.axboe" , linux-kernel@vger.kernel.org, stable@kernel.org, dm-devel@redhat.com, Alasdair G Kergon , "Martin K. Petersen" Subject: Re: high iowait problem(Bug 12309 on bugzilla.kernel.org) From: "Martin K. Petersen" Organization: Oracle References: <20100331124834.192500@gmx.com> <20100413135416.b537eee8.akpm@linux-foundation.org> Date: Wed, 14 Apr 2010 10:25:08 -0400 In-Reply-To: <20100413135416.b537eee8.akpm@linux-foundation.org> (Andrew Morton's message of "Tue, 13 Apr 2010 13:54:16 -0700") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Source-IP: acsmt353.oracle.com [141.146.40.153] X-Auth-Type: Internal IP X-CT-RefId: str=0001.0A090201.4BC5D056.00E5:SCFMA4539814,ss=1,fgs=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 972 Lines: 23 >>>>> "Andrew" == Andrew Morton writes: Andrew> I'm seeing just one device-mapper change whcih went in over that Andrew> timeframe: Andrew> : commit e0f5cfa7c18b411634e73923841eccd3a4c0ce7f Andrew> : Author: Martin K. Petersen Andrew> : Date: Mon Jan 11 03:21:50 2010 -0500 Andrew> : Andrew> : DM: Fix device mapper topology stacking The topology changes do not modify anything in our runtime I/O path. They only come into play during filesystem or logical volume creation on top of devices that support reporting alignment/physical block size. And you need recent dm and filesystem utilities for that to work. -- Martin K. Petersen Oracle Linux Engineering -- 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/