From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail202.messagelabs.com (mail202.messagelabs.com [216.82.254.227]) by kanga.kvack.org (Postfix) with SMTP id 97C526008D8 for ; Tue, 24 Aug 2010 02:52:40 -0400 (EDT) Received: by ywo7 with SMTP id 7so3100701ywo.14 for ; Mon, 23 Aug 2010 23:52:38 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <8E31CE28A1354C43BBAD0BDEFA10494E@rainbow> References: <20100818154130.GC9431@localhost> <565A4EE71DAC4B1A820B2748F56ABF73@rainbow> <20100819160006.GG6805@barrios-desktop> <20100820053447.GA13406@localhost> <20100820093558.GG19797@csn.ul.ie> <20100822153121.GA29389@barrios-desktop> <20100822232316.GA339@localhost> <20100823171416.GA2216@barrios-desktop> <20100824002753.GB6568@localhost> <8E31CE28A1354C43BBAD0BDEFA10494E@rainbow> Date: Tue, 24 Aug 2010 15:52:37 +0900 Message-ID: Subject: Re: compaction: trying to understand the code From: Minchan Kim Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sender: owner-linux-mm@kvack.org To: Iram Shahzad Cc: Wu Fengguang , Mel Gorman , Andrew Morton , linux-mm@kvack.org, KOSAKI Motohiro List-ID: On Tue, Aug 24, 2010 at 2:07 PM, Iram Shahzad wrote: >> One question is, why kswapd won't proceed after isolating all the pages? >> If it has done with the isolated pages, we'll see growing inactive_anon >> numbers. >> >> /proc/vmstat should give more clues on any possible page reclaim >> activities. Iram, would you help post it? > > I am not sure which point of time are you interested in, so I am > attaching /proc/vmstat log of 3 points. > > too_many_isolated_vmstat_before_frag.txt > =A0This one is taken before I ran my test app which attempts > =A0to make fragmentation > too_many_isolated_vmstat_before_compaction.txt > =A0This one is taken after running the test app and before > =A0running compaction. > too_many_isolated_vmstat_during_compaction.txt > =A0This one is taken a few minutes after running compaction. > =A0To take this I ran compaction in background. > > Thanks > Iram > Hmm.. Never happens reclaim. Strange. In addtion, pgpgin is always 4. pgpgin 4 pgpgout 0 Is it possible? What kinds of filesystem do you use? Do you boot from NFS? Do your system have any non-mainline(ie, doesn't merged into linux kernel tree) driver, file system or any feature? Maybe your config file can answer this questions. Thanks. --=20 Kind regards, Minchan Kim -- 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