From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id 1178E60021B for ; Sun, 27 Dec 2009 23:12:14 -0500 (EST) Message-ID: <4B383017.4070308@redhat.com> Date: Sun, 27 Dec 2009 23:12:07 -0500 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH -mmotm-2009-12-10-17-19] Prevent churning of zero page in LRU list. References: <20091228115315.76b1ecd0.minchan.kim@barrios-desktop> <4B38246C.3020209@redhat.com> <20091228035639.GG3601@balbir.in.ibm.com> <20091228035738.GH3601@balbir.in.ibm.com> In-Reply-To: <20091228035738.GH3601@balbir.in.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: balbir@linux.vnet.ibm.com Cc: Minchan Kim , Andrew Morton , lkml , linux-mm , Hugh Dickins , KOSAKI Motohiro List-ID: 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. -- All rights reversed. -- 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