From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760193AbZEMDTY (ORCPT ); Tue, 12 May 2009 23:19:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756890AbZEMDGz (ORCPT ); Tue, 12 May 2009 23:06:55 -0400 Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]:47697 "EHLO fgwmail5.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756996AbZEMDGy (ORCPT ); Tue, 12 May 2009 23:06:54 -0400 From: KOSAKI Motohiro To: KOSAKI Motohiro Subject: [PATCH 2/4] vmscan: drop PF_SWAPWRITE from zone_reclaim Cc: kosaki.motohiro@jp.fujitsu.com, LKML , linux-mm , Andrew Morton , Rik van Riel , Christoph Lameter In-Reply-To: <20090513120155.5879.A69D9226@jp.fujitsu.com> References: <20090513120155.5879.A69D9226@jp.fujitsu.com> Message-Id: <20090513120627.587F.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50.07 [ja] Date: Wed, 13 May 2009 12:06:51 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Signed-off-by: KOSAKI Motohiro Cc: Christoph Lameter Cc: Rik van Riel --- mm/vmscan.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) Index: b/mm/vmscan.c =================================================================== --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -2406,7 +2406,7 @@ static int __zone_reclaim(struct zone *z * and we also need to be able to write out pages for RECLAIM_WRITE * and RECLAIM_SWAP. */ - p->flags |= PF_MEMALLOC | PF_SWAPWRITE; + p->flags |= PF_MEMALLOC; reclaim_state.reclaimed_slab = 0; p->reclaim_state = &reclaim_state; @@ -2453,7 +2453,7 @@ static int __zone_reclaim(struct zone *z } p->reclaim_state = NULL; - current->flags &= ~(PF_MEMALLOC | PF_SWAPWRITE); + current->flags &= ~PF_MEMALLOC; return sc.nr_reclaimed >= nr_pages; }