From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail190.messagelabs.com (mail190.messagelabs.com [216.82.249.51]) by kanga.kvack.org (Postfix) with ESMTP id E715160021B for ; Sun, 27 Dec 2009 23:17:39 -0500 (EST) Received: from d28relay03.in.ibm.com (d28relay03.in.ibm.com [9.184.220.60]) by e28smtp07.in.ibm.com (8.14.3/8.13.1) with ESMTP id nBS4HYcP008220 for ; Mon, 28 Dec 2009 09:47:34 +0530 Received: from d28av04.in.ibm.com (d28av04.in.ibm.com [9.184.220.66]) by d28relay03.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id nBS4HYGr3641432 for ; Mon, 28 Dec 2009 09:47:34 +0530 Received: from d28av04.in.ibm.com (loopback [127.0.0.1]) by d28av04.in.ibm.com (8.14.3/8.13.1/NCO v10.0 AVout) with ESMTP id nBS4HYxY023056 for ; Mon, 28 Dec 2009 15:17:34 +1100 Date: Mon, 28 Dec 2009 09:47:31 +0530 From: Balbir Singh 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> Sender: owner-linux-mm@kvack.org To: Rik van Riel Cc: Minchan Kim , Andrew Morton , lkml , linux-mm , Hugh Dickins , KOSAKI Motohiro List-ID: * 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, 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/ . Don't email: email@kvack.org