From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753509Ab2IYHep (ORCPT ); Tue, 25 Sep 2012 03:34:45 -0400 Received: from LGEMRELSE1Q.lge.com ([156.147.1.111]:43020 "EHLO LGEMRELSE1Q.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751768Ab2IYHen (ORCPT ); Tue, 25 Sep 2012 03:34:43 -0400 X-AuditID: 9c93016f-b7c19ae000000e6d-bd-50615e911d61 Date: Tue, 25 Sep 2012 16:37:47 +0900 From: Minchan Kim To: Mel Gorman Cc: Andrew Morton , Richard Davies , Shaohua Li , Rik van Riel , Avi Kivity , QEMU-devel , KVM , Linux-MM , LKML Subject: Re: [PATCH 7/9] Revert "mm: have order > 0 compaction start off where it left" Message-ID: <20120925073747.GO13234@bbox> References: <1348224383-1499-1-git-send-email-mgorman@suse.de> <1348224383-1499-8-git-send-email-mgorman@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1348224383-1499-8-git-send-email-mgorman@suse.de> User-Agent: Mutt/1.5.21 (2010-09-15) X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Sep 21, 2012 at 11:46:21AM +0100, Mel Gorman wrote: > This reverts commit 7db8889a (mm: have order > 0 compaction start off > where it left) and commit de74f1cc (mm: have order > 0 compaction start > near a pageblock with free pages). These patches were a good idea and > tests confirmed that they massively reduced the amount of scanning but > the implementation is complex and tricky to understand. A later patch > will cache what pageblocks should be skipped and reimplements the > concept of compact_cached_free_pfn on top for both migration and > free scanners. > > Signed-off-by: Mel Gorman > Acked-by: Rik van Riel Acked-by: Minchan Kim -- Kind regards, Minchan Kim