From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751989AbaG2RuC (ORCPT ); Tue, 29 Jul 2014 13:50:02 -0400 Received: from mga09.intel.com ([134.134.136.24]:17745 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750980AbaG2RuA (ORCPT ); Tue, 29 Jul 2014 13:50:00 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.01,758,1400050800"; d="scan'208";a="550821454" Subject: Re: [Regression 3.16-rc kernel] -55% reduction in throughput for OLTP benchmark From: Tim Chen To: Christoph Hellwig Cc: Al Viro , suruchi , ak , Dave Hansen , Matthew Wilcox , "hubert.nueckel" , beth.marsh-prime@intel.com, "doug.nelson" , linux-kernel , linux-fsdevel In-Reply-To: <20140729164951.GA23863@infradead.org> References: <1406584299.2970.924.camel@schen9-DESK> <20140729141908.GA4464@infradead.org> <1406651702.2970.927.camel@schen9-DESK> <20140729164951.GA23863@infradead.org> Content-Type: text/plain; charset="UTF-8" Date: Tue, 29 Jul 2014 10:41:57 -0700 Message-ID: <1406655717.2970.928.camel@schen9-DESK> Mime-Version: 1.0 X-Mailer: Evolution 2.32.3 (2.32.3-1.fc14) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2014-07-29 at 09:49 -0700, Christoph Hellwig wrote: > On Tue, Jul 29, 2014 at 09:35:02AM -0700, Tim Chen wrote: > > On Tue, 2014-07-29 at 07:19 -0700, Christoph Hellwig wrote: > > > Hi Tim, > > > > > > I think the problem is that sdio.size doesn't get set set with > > > the new dio code. Please try the patch below to fix this by not > > > relying on that field: > > > > Thanks for your quick response. We'll test this patch and let you > > know the results. > > There actually was a little bug in it, please try the version below > instead: > Thanks. Will do. Tim