From: James Bottomley Subject: Re: [PATCH 3/3] mm: slub: Default slub_max_order to 0 Date: Thu, 12 May 2011 14:21:12 -0500 Message-ID: <1305228072.2575.67.camel@mulgrave.site> References: <1305127773-10570-1-git-send-email-mgorman@suse.de> <1305127773-10570-4-git-send-email-mgorman@suse.de> <1305213359.2575.46.camel@mulgrave.site> <1305214993.2575.50.camel@mulgrave.site> <1305215742.27848.40.camel@jaguar> <1305225467.2575.66.camel@mulgrave.site> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Pekka Enberg , Mel Gorman , Andrew Morton , Colin King , Raghavendra D Prabhu , Jan Kara , Chris Mason , Rik van Riel , Johannes Weiner , linux-fsdevel , linux-mm , linux-kernel , linux-ext4 To: Christoph Lameter Return-path: Received: from bedivere.hansenpartnership.com ([66.63.167.143]:50924 "EHLO bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753692Ab1ELTVQ (ORCPT ); Thu, 12 May 2011 15:21:16 -0400 In-Reply-To: Sender: linux-ext4-owner@vger.kernel.org List-ID: On Thu, 2011-05-12 at 13:46 -0500, Christoph Lameter wrote: > On Thu, 12 May 2011, James Bottomley wrote: > > > On Thu, 2011-05-12 at 18:55 +0300, Pekka Enberg wrote: > > > On Thu, 2011-05-12 at 10:43 -0500, James Bottomley wrote: > > > > However, since you admit even you see problems, let's concentrate on > > > > fixing them rather than recriminations? > > > > > > Yes, please. So does dropping max_order to 1 help? > > > PAGE_ALLOC_COSTLY_ORDER is set to 3 in 2.6.39-rc7. > > > > Just booting with max_slab_order=1 (and none of the other patches > > applied) I can still get the machine to go into kswapd at 99%, so it > > doesn't seem to make much of a difference. > > slub_max_order=1 right? Not max_slab_order. Yes. James