From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756666AbZEMNha (ORCPT ); Wed, 13 May 2009 09:37:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752739AbZEMNhP (ORCPT ); Wed, 13 May 2009 09:37:15 -0400 Received: from mx2.redhat.com ([66.187.237.31]:38092 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752095AbZEMNhO (ORCPT ); Wed, 13 May 2009 09:37:14 -0400 Message-ID: <4A0ACCAA.4020505@redhat.com> Date: Wed, 13 May 2009 09:35:38 -0400 From: Rik van Riel Organization: Red Hat, Inc User-Agent: Thunderbird 2.0.0.17 (X11/20080915) MIME-Version: 1.0 To: KOSAKI Motohiro CC: LKML , linux-mm , Andrew Morton , Christoph Lameter Subject: Re: [PATCH 2/4] vmscan: drop PF_SWAPWRITE from zone_reclaim References: <20090513120155.5879.A69D9226@jp.fujitsu.com> <20090513120627.587F.A69D9226@jp.fujitsu.com> In-Reply-To: <20090513120627.587F.A69D9226@jp.fujitsu.com> 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 KOSAKI Motohiro wrote: > Subject: [PATCH] vmscan: drop PF_SWAPWRITE from zone_reclaim > > PF_SWAPWRITE mean ignore write congestion. (see may_write_to_queue()) > > foreground reclaim shouldn't ignore it because to write congested device cause > large IO lantency. > it isn't better than remote node allocation. It might be on NUMAQ (which is no longer manufactured), but your change looks right for every other vaguely modern NUMA architecture that I know of. > Signed-off-by: KOSAKI Motohiro > Cc: Christoph Lameter > Cc: Rik van Riel Acked-by: Rik van Riel -- All rights reversed.