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 3AF5D6B0011 for ; Tue, 31 May 2011 09:39:55 -0400 (EDT) Date: Tue, 31 May 2011 15:39:50 +0200 From: Johannes Weiner Subject: Re: [PATCH v2 04/10] Add additional isolation mode Message-ID: <20110531133950.GA4594@cmpxchg.org> References: <5b0f0be7ee441ea27ffcad81d2637ac09407acf3.1306689214.git.minchan.kim@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5b0f0be7ee441ea27ffcad81d2637ac09407acf3.1306689214.git.minchan.kim@gmail.com> Sender: owner-linux-mm@kvack.org List-ID: To: Minchan Kim Cc: Andrew Morton , linux-mm , LKML , KAMEZAWA Hiroyuki , KOSAKI Motohiro , Mel Gorman , Rik van Riel , Andrea Arcangeli On Mon, May 30, 2011 at 03:13:43AM +0900, Minchan Kim wrote: > There are some places to isolate lru page and I believe > users of isolate_lru_page will be growing. > The purpose of them is each different so part of isolated pages > should put back to LRU, again. > > The problem is when we put back the page into LRU, > we lose LRU ordering and the page is inserted at head of LRU list. > It makes unnecessary LRU churning so that vm can evict working set pages > rather than idle pages. > > This patch adds new modes when we isolate page in LRU so we don't isolate pages > if we can't handle it. It could reduce LRU churning. > > This patch doesn't change old behavior. It's just used by next patches. > > Cc: KOSAKI Motohiro > Cc: Mel Gorman > Cc: Rik van Riel > Cc: Andrea Arcangeli > Cc: Johannes Weiner > Cc: KAMEZAWA Hiroyuki > Signed-off-by: Minchan Kim Acked-by: Johannes Weiner -- 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