From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta8.messagelabs.com (mail6.bemta8.messagelabs.com [216.82.243.55]) by kanga.kvack.org (Postfix) with ESMTP id C0FE46B0012 for ; Sun, 12 Jun 2011 21:04:34 -0400 (EDT) Received: from m1.gw.fujitsu.co.jp (unknown [10.0.50.71]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 9176A3EE081 for ; Mon, 13 Jun 2011 10:04:30 +0900 (JST) Received: from smail (m1 [127.0.0.1]) by outgoing.m1.gw.fujitsu.co.jp (Postfix) with ESMTP id 0FCCA45DF4E for ; Mon, 13 Jun 2011 10:04:24 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (s1.gw.fujitsu.co.jp [10.0.50.91]) by m1.gw.fujitsu.co.jp (Postfix) with ESMTP id A361445DF4D for ; Mon, 13 Jun 2011 10:04:23 +0900 (JST) Received: from s1.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 91AE31DB804F for ; Mon, 13 Jun 2011 10:04:23 +0900 (JST) Received: from m107.s.css.fujitsu.com (m107.s.css.fujitsu.com [10.240.81.147]) by s1.gw.fujitsu.co.jp (Postfix) with ESMTP id 5DBDD1DB804E for ; Mon, 13 Jun 2011 10:04:23 +0900 (JST) Message-ID: <4DF5620B.1080706@jp.fujitsu.com> Date: Mon, 13 Jun 2011 10:04:11 +0900 From: KOSAKI Motohiro MIME-Version: 1.0 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: owner-linux-mm@kvack.org List-ID: 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 (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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org