From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx202.postini.com [74.125.245.202]) by kanga.kvack.org (Postfix) with SMTP id D39D06B005A for ; Wed, 27 Jun 2012 20:58:37 -0400 (EDT) Message-ID: <4FEBAC42.3030800@kernel.org> Date: Thu, 28 Jun 2012 09:58:42 +0900 From: Minchan Kim MIME-Version: 1.0 Subject: Re: excessive CPU utilization by isolate_freepages? References: <4FEB8237.6030402@sandia.gov> <4FEB9E73.5040709@kernel.org> <4FEBA520.4030205@redhat.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: David Rientjes Cc: Rik van Riel , Jim Schutt , Andrew Morton , Mel Gorman , KAMEZAWA Hiroyuki , linux-mm@kvack.org, linux-kernel@vger.kernel.org, "ceph-devel@vger.kernel.org" On 06/28/2012 09:52 AM, David Rientjes wrote: > On Wed, 27 Jun 2012, Rik van Riel wrote: > >>> > > I doubt compaction try to migrate continuously although we have no free >>> > > memory. >>> > > Could you apply this patch and retest? >>> > > >>> > > https://lkml.org/lkml/2012/6/21/30 >> > > Not sure if Jim is using memcg; if not, then this won't be helpful. > It doesn't related to memcg. if compaction_alloc can't find suitable migration target, it returns NULL. Then, migrate_pages should be exit. -- 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