From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756904AbYIRTkG (ORCPT ); Thu, 18 Sep 2008 15:40:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754906AbYIRTj4 (ORCPT ); Thu, 18 Sep 2008 15:39:56 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:34383 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754293AbYIRTjz (ORCPT ); Thu, 18 Sep 2008 15:39:55 -0400 Message-ID: <48D2AE6C.7060507@linux-foundation.org> Date: Thu, 18 Sep 2008 14:39:24 -0500 From: Christoph Lameter User-Agent: Thunderbird 2.0.0.16 (Windows/20080708) MIME-Version: 1.0 To: Jeremy Fitzhardinge CC: Chris Snook , Nick Piggin , Hugh Dickens , Linux Memory Management List , Linux Kernel Mailing List , Avi Kivity , Andrew Morton , Rik van Riel , "Martin J. Bligh" Subject: Re: Populating multiple ptes at fault time References: <48D142B2.3040607@goop.org> <48D1625C.7000309@redhat.com> <48D17A93.4000803@goop.org> <48D29AFB.5070409@linux-foundation.org> <48D2A392.6010308@goop.org> In-Reply-To: <48D2A392.6010308@goop.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Jeremy Fitzhardinge wrote: > Thanks, that was exactly what I was hoping to see. I didn't see any > definitive statements against the patch set, other than a concern that > it could make things worse. Was the upshot that no consensus was > reached about how to detect when its beneficial to preallocate anonymous > pages? There were multiple discussions on the subject. The consensus was that it was difficult to generalize this and it would only work on special loads. Plus it would add some overhead to the general case. > Christoph (and others): do you think vm changes in the last 4 years > would have changed the outcome of these results? Seems that the code today is similar. So it would still work.