From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762830AbYD3NQj (ORCPT ); Wed, 30 Apr 2008 09:16:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761583AbYD3NQ1 (ORCPT ); Wed, 30 Apr 2008 09:16:27 -0400 Received: from smtp-out.google.com ([216.239.33.17]:56317 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760998AbYD3NQ0 (ORCPT ); Wed, 30 Apr 2008 09:16:26 -0400 DomainKey-Signature: a=rsa-sha1; s=beta; d=google.com; c=nofws; q=dns; h=received:message-id:date:from:to:subject:cc:in-reply-to: mime-version:content-type:content-transfer-encoding: content-disposition:references; b=tjTronzFa/DvmXWa7mhSQFVe6ugQfkAlyhea4+ljrGaFcXnOVrQUqvtk2a6Kmrij5 j5v2nw7Tui2BWBf9jdxbg== Message-ID: Date: Wed, 30 Apr 2008 09:16:15 -0400 From: "Ross Biro" To: balbir@linux.vnet.ibm.com Subject: Re: Page Faults slower in 2.6.25-rc9 than 2.6.23 Cc: "Hugh Dickins" , linux-mm@kvack.org, lkml , "Kamalesh Babulal" In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <661de9470804290752w1dc0cfb3k72e81d828a45765e@mail.gmail.com> <48175005.90400@linux.vnet.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Apr 29, 2008 at 1:00 PM, Ross Biro wrote: > > Aah.. Yes... but I am definitely interested in figuring out the root cause for > > the regression. > > I can't reproduce the 2.6.23 results. I'm going to run the benchmarks > a few more times, but I'm suspecting something changed with the > hardware. The 2.6.23 results have been consistant with 2.6.24 results and lmbench has crashed my test machine at least once. I'm guessing some sort of memory error causing a lot of ECC and slowing things down. Ross