From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail6.bemta12.messagelabs.com (mail6.bemta12.messagelabs.com [216.82.250.247]) by kanga.kvack.org (Postfix) with ESMTP id 978C66B004A for ; Mon, 6 Jun 2011 09:27:22 -0400 (EDT) Received: by pzk4 with SMTP id 4so2309737pzk.14 for ; Mon, 06 Jun 2011 06:27:20 -0700 (PDT) Date: Mon, 6 Jun 2011 22:27:10 +0900 From: Minchan Kim Subject: Re: [PATCH] mm: compaction: Abort compaction if too many pages are isolated and caller is asynchronous Message-ID: <20110606132709.GB1686@barrios-laptop> References: <20110601233036.GZ19505@random.random> <20110602010352.GD7306@suse.de> <20110602132954.GC19505@random.random> <20110602145019.GG7306@suse.de> <20110602153754.GF19505@random.random> <20110603020920.GA26753@suse.de> <20110603144941.GI7306@suse.de> <20110604065853.GA4114@barrios-laptop> <20110606104345.GE5247@suse.de> <20110606124025.GB12887@random.random> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110606124025.GB12887@random.random> Sender: owner-linux-mm@kvack.org List-ID: To: Andrea Arcangeli Cc: Mel Gorman , akpm@linux-foundation.org, Ury Stankevich , KOSAKI Motohiro , linux-kernel@vger.kernel.org, linux-mm@kvack.org, stable@kernel.org On Mon, Jun 06, 2011 at 02:40:25PM +0200, Andrea Arcangeli wrote: > On Mon, Jun 06, 2011 at 11:43:45AM +0100, Mel Gorman wrote: > > Maybe not full, but it has more PageReserved pages than anywhere else > > and few MIGRATE_MOVABLE blocks. MIGRATE_MOVABLE gets skipped during > > async compaction we could easily reach the end of the DMA zone quickly. > > Debug data has nr_isolated_file in dma zone 1 and nr_isolated_file in > normal zone being -1. It's exactly match with Mel's case. Thanks for the proving, Andrea. -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org