Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754813Ab1FMBEe (ORCPT ); Sun, 12 Jun 2011 21:04:34 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:48891 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754542Ab1FMBEc (ORCPT ); Sun, 12 Jun 2011 21:04:32 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 Message-ID: <4DF5620B.1080706@jp.fujitsu.com> Date: Mon, 13 Jun 2011 10:04:11 +0900 From: KOSAKI Motohiro User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; ja; rv:1.9.2.17) Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10 MIME-Version: 1.0 To: minchan.kim@gmail.com CC: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, mgorman@suse.de, aarcange@redhat.com, riel@redhat.com, hannes@cmpxchg.org, kamezawa.hiroyu@jp.fujitsu.com Subject: Re: [PATCH v3 05/10] vmscan: make isolate_lru_page with filter aware References: In-Reply-To: Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1112 Lines: 27 (2011/06/07 23:38), Minchan Kim wrote: > In __zone_reclaim case, we don't want to shrink mapped page. > Nonetheless, we have isolated mapped page and re-add it into > LRU's head. It's unnecessary CPU overhead and makes LRU churning. > > Of course, when we isolate the page, the page might be mapped but > when we try to migrate the page, the page would be not mapped. > So it could be migrated. But race is rare and although it happens, > it's no big deal. > > Cc: KOSAKI Motohiro > Cc: Mel Gorman > Cc: Rik van Riel > Cc: Andrea Arcangeli > Reviewed-by: KAMEZAWA Hiroyuki > Acked-by: Johannes Weiner > Signed-off-by: Minchan Kim Reviewed-by: KOSAKI Motohiro -- 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/