From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751371AbZHSJIm (ORCPT ); Wed, 19 Aug 2009 05:08:42 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750900AbZHSJIl (ORCPT ); Wed, 19 Aug 2009 05:08:41 -0400 Received: from gir.skynet.ie ([193.1.99.77]:52821 "EHLO gir.skynet.ie" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750800AbZHSJIl (ORCPT ); Wed, 19 Aug 2009 05:08:41 -0400 Date: Wed, 19 Aug 2009 10:08:44 +0100 From: Mel Gorman To: Christoph Lameter Cc: Linux Memory Management List , Nick Piggin , Linux Kernel Mailing List Subject: Re: [RFC PATCH 0/3] Reduce searching in the page allocator fast-path Message-ID: <20090819090843.GB24809@csn.ul.ie> References: <1250594162-17322-1-git-send-email-mel@csn.ul.ie> <20090818165340.GB13435@csn.ul.ie> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.17+20080114 (2008-01-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 18, 2009 at 03:05:25PM -0400, Christoph Lameter wrote: > On Tue, 18 Aug 2009, Mel Gorman wrote: > > > Can you point me to which patchset you are talking about specifically that > > uses per-cpu atomics in the hot path? There are a lot of per-cpu patches > > related to you that have been posted in the last few months and I'm not sure > > what any of their merge status' is. > > The following patch just moved the page allocator to use the new per cpu > allocator. It does not use per cpu atomic yet but its possible then. > > http://marc.info/?l=linux-mm&m=124527414206546&w=2 > Ok, I don't see this particular patch merged, is it in a merge queue somewhere? After glancing through, I can see how it might help. I'm going to drop patch 3 of this set that shuffles data from the PCP to the zone and take a closer look at those patches. Patch 1 and 2 of this set should still go ahead. Do you agree? -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab