From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760900Ab2DKSws (ORCPT ); Wed, 11 Apr 2012 14:52:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:14792 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756933Ab2DKSwp (ORCPT ); Wed, 11 Apr 2012 14:52:45 -0400 Message-ID: <4F85BE78.8040205@redhat.com> Date: Wed, 11 Apr 2012 13:25:12 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1 MIME-Version: 1.0 To: Mel Gorman CC: Andrew Morton , Konstantin Khlebnikov , Hugh Dickins , Ying Han , Linux-MM , LKML Subject: Re: [PATCH 1/3] mm: vmscan: Remove lumpy reclaim References: <1334162298-18942-1-git-send-email-mgorman@suse.de> <1334162298-18942-2-git-send-email-mgorman@suse.de> In-Reply-To: <1334162298-18942-2-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/11/2012 12:38 PM, Mel Gorman wrote: > Lumpy reclaim had a purpose but in the mind of some, it was to kick > the system so hard it trashed. For others the purpose was to complicate > vmscan.c. Over time it was giving softer shoes and a nicer attitude but > memory compaction needs to step up and replace it so this patch sends > lumpy reclaim to the farm. > > The tracepoint format changes for isolating LRU pages with this patch > applied. Furthermore reclaim/compaction can no longer queue dirty pages in > pageout() if the underlying BDI is congested. Lumpy reclaim used this logic > and reclaim/compaction was using it in error. > > Signed-off-by: Mel Gorman Acked-by: Rik van Riel