Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751492AbZL1ERi (ORCPT ); Sun, 27 Dec 2009 23:17:38 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751141AbZL1ERh (ORCPT ); Sun, 27 Dec 2009 23:17:37 -0500 Received: from e28smtp01.in.ibm.com ([122.248.162.1]:60195 "EHLO e28smtp01.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751111AbZL1ERh (ORCPT ); Sun, 27 Dec 2009 23:17:37 -0500 Date: Mon, 28 Dec 2009 09:47:31 +0530 From: Balbir Singh To: Rik van Riel Cc: Minchan Kim , Andrew Morton , lkml , linux-mm , Hugh Dickins , KOSAKI Motohiro Subject: Re: [PATCH -mmotm-2009-12-10-17-19] Prevent churning of zero page in LRU list. Message-ID: <20091228041731.GI3601@balbir.in.ibm.com> Reply-To: balbir@linux.vnet.ibm.com References: <20091228115315.76b1ecd0.minchan.kim@barrios-desktop> <4B38246C.3020209@redhat.com> <20091228035639.GG3601@balbir.in.ibm.com> <20091228035738.GH3601@balbir.in.ibm.com> <4B383017.4070308@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <4B383017.4070308@redhat.com> User-Agent: Mutt/1.5.20 (2009-08-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1175 Lines: 35 * Rik van Riel [2009-12-27 23:12:07]: > On 12/27/2009 10:57 PM, Balbir Singh wrote: > >* Balbir Singh [2009-12-28 09:26:39]: > > > >>* Rik van Riel [2009-12-27 22:22:20]: > >> > >>>On 12/27/2009 09:53 PM, Minchan Kim wrote: > >>>> > >>>>VM doesn't add zero page to LRU list. > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > >>Frequent moving of zero page should ideally put it to the head of the > >>LRU list, leaving it untouched is likely to cause it to be scanned > >>often - no? Should this be moved to the unevictable list? > >> > > > >Sorry, I replied to wrong email, I should have been clearer that this > >question is for Minchan Kim. > > The answer to your question is all the way up in > Minchan Kim's original email. > > The zero page is never on the LRU lists to begin with. > Aahh.. my bad... I should have looked at it more closely! -- Balbir -- 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/