Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932537Ab1ELSQX (ORCPT ); Thu, 12 May 2011 14:16:23 -0400 Received: from smtp102.prem.mail.ac4.yahoo.com ([76.13.13.41]:34193 "HELO smtp102.prem.mail.ac4.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S932370Ab1ELSQV (ORCPT ); Thu, 12 May 2011 14:16:21 -0400 X-Yahoo-SMTP: _Dag8S.swBC1p4FJKLCXbs8NQzyse1SYSgnAbY0- X-YMail-OSG: MbwqVQEVM1mceR9RBrgScgjUXiQIK7RlYVyyg1FctvvgoK0 3M8nqvkBjVO3LwpF2tkQgwzL0ek1VkIx1.FUWOED0XfbTAaNmxELSpwWUJF1 psfbrulBW15lkLLmX1nzoXiHu_LFOLC8cGghg8pPxkcLa4B89tlgHZpZM9sa JE4_aFBEXEGbWsCWlJshe5PScCChwaGJg9qBMecCw0G73qA5NtDw1JL9RjCQ mvEqWH1AxNyNkkQCp4H46hqmFQPyTvIM06jbWO0SAM5MqZmienX0C02.Go6G KZYfpuA7Z7IG9TPOgORj9AqDp5xwVSK2w2HmwnrGBcZfyfg6WSI_AAS6sMxt .tAv9e9r6vbjqBppjRb4xT_gh X-Yahoo-Newman-Property: ymail-3 Date: Thu, 12 May 2011 13:16:15 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@router.home To: Andrea Arcangeli cc: Pekka Enberg , James Bottomley , Dave Jones , 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 Subject: Re: [PATCH 3/3] mm: slub: Default slub_max_order to 0 In-Reply-To: <20110512180921.GP11579@random.random> Message-ID: References: <1305214993.2575.50.camel@mulgrave.site> <20110512154649.GB4559@redhat.com> <1305216023.2575.54.camel@mulgrave.site> <1305217843.2575.57.camel@mulgrave.site> <20110512175104.GM11579@random.random> <20110512180921.GP11579@random.random> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1077 Lines: 23 On Thu, 12 May 2011, Andrea Arcangeli wrote: > On Thu, May 12, 2011 at 01:03:05PM -0500, Christoph Lameter wrote: > > On Thu, 12 May 2011, Andrea Arcangeli wrote: > > > > > even order 3 is causing troubles (which doesn't immediately make lumpy > > > activated, it only activates when priority is < DEF_PRIORITY-2, so > > > after 2 loops failing to reclaim nr_to_reclaim pages), imagine what > > > > That is a significant change for SLUB with the merge of the compaction > > code. > > Even before compaction was posted, I had to shut off lumpy reclaim or > it'd hang all the time with frequent order 9 allocations. Maybe lumpy > was better before, maybe lumpy "improved" its reliability recently, Well we are concerned about order 2 and 3 alloc here. Checking for < PAGE_ORDER_COSTLY to avoid the order 9 lumpy reclaim looks okay. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/