Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754012Ab2HGNaX (ORCPT ); Tue, 7 Aug 2012 09:30:23 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48135 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751607Ab2HGNaW (ORCPT ); Tue, 7 Aug 2012 09:30:22 -0400 Message-ID: <50211865.90702@redhat.com> Date: Tue, 07 Aug 2012 09:30:13 -0400 From: Rik van Riel User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: Mel Gorman CC: Linux-MM , Minchan Kim , Jim Schutt , LKML Subject: Re: [PATCH 4/6] mm: compaction: Capture a suitable high-order page immediately when it is made available References: <1344342677-5845-1-git-send-email-mgorman@suse.de> <1344342677-5845-5-git-send-email-mgorman@suse.de> In-Reply-To: <1344342677-5845-5-git-send-email-mgorman@suse.de> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 793 Lines: 19 On 08/07/2012 08:31 AM, Mel Gorman wrote: > While compaction is moving pages to free up large contiguous blocks for > allocation it races with other allocation requests that may steal these > blocks or break them up. This patch alters direct compaction to capture a > suitable free page as soon as it becomes available to reduce this race. It > uses similar logic to split_free_page() to ensure that watermarks are > still obeyed. > > Signed-off-by: Mel Gorman Reviewed-by: Rik van Riel -- All rights reversed -- 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/