From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx166.postini.com [74.125.245.166]) by kanga.kvack.org (Postfix) with SMTP id 211F86B002B for ; Thu, 22 Nov 2012 10:41:12 -0500 (EST) Date: Thu, 22 Nov 2012 23:41:07 +0800 From: Fengguang Wu Subject: Re: Problem in Page Cache Replacement Message-ID: <20121122154107.GB11736@localhost> References: <1353433362.85184.YahooMailNeo@web141101.mail.bf1.yahoo.com> <20121120182500.GH1408@quack.suse.cz> <1353485020.53500.YahooMailNeo@web141104.mail.bf1.yahoo.com> <1353485630.17455.YahooMailNeo@web141106.mail.bf1.yahoo.com> <50AC9220.70202@gmail.com> <20121121090204.GA9064@localhost> <50ACA209.9000101@gmail.com> <1353491880.11679.YahooMailNeo@web141102.mail.bf1.yahoo.com> <50ACA634.5000007@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Sender: owner-linux-mm@kvack.org List-ID: To: Metin =?utf-8?B?RMO2xZ9sw7w=?= Cc: Jaegeuk Hanse , Jan Kara , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" On Wed, Nov 21, 2012 at 12:07:22PM +0200, Metin DA?A?lA 1/4 wrote: > On Wed, Nov 21, 2012 at 12:00 PM, Jaegeuk Hanse wrote: > > > > On 11/21/2012 05:58 PM, metin d wrote: > > > > Hi Fengguang, > > > > I run tests and attached the results. The line below I guess shows the data-1 page caches. > > > > 0x000000080000006c 6584051 25718 __RU_lA___________________P________ referenced,uptodate,lru,active,private > > > > > > I thinks this is just one state of page cache pages. > > But why these page caches are in this state as opposed to other page > caches. From the results I conclude that: > > data-1 pages are in state : referenced,uptodate,lru,active,private I wonder if it's this code that stops data-1 pages from being reclaimed: shrink_page_list(): if (page_has_private(page)) { if (!try_to_release_page(page, sc->gfp_mask)) goto activate_locked; What's the filesystem used? > data-2 pages are in state : referenced,uptodate,lru,mappedtodisk Thanks, Fengguang -- 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