Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754844Ab1EFItx (ORCPT ); Fri, 6 May 2011 04:49:53 -0400 Received: from mailout.rz.uni-frankfurt.de ([141.2.22.233]:54255 "EHLO mailout.rz.uni-frankfurt.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754216Ab1EFItv (ORCPT ); Fri, 6 May 2011 04:49:51 -0400 Message-ID: <4DC3B629.7010409@gmx.de> Date: Fri, 06 May 2011 10:49:45 +0200 From: Thomas Sattler User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110414 Mnenhy/0.8.3 Thunderbird/3.1.10 MIME-Version: 1.0 To: Andrea Arcangeli CC: Linux Kernel Mailing List , Mel Gorman Subject: Re: iotop: khugepaged at 99.99% (2.6.38.X) References: <4DAF6C0B.3070009@gmx.de> <20110427134613.GI32590@random.random> <4DC14474.9040001@gmx.de> <20110504143842.GK7838@random.random> <4DC31EDE.2020503@gmx.de> <20110506011319.GH7838@random.random> In-Reply-To: <20110506011319.GH7838@random.random> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-MailScanner: Found to be clean Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1266 Lines: 35 > You can already run "grep threshold /proc/zoneinfo" on the system > where you reproduced the hang the last time (the one running 2.6.38.4) > the one with 1.5G of ram. They all should be well below 512 (so in > theory not causing troubles because of the per-cpu stats, and with so > few cpus it shouldn't have been such a longstanding problem anyway). 'grep threshold /proc/zoneinfo' returns nothing on this machine after a reboot and before a crash. Did I tell it's a single core machine? > If you didn't reboot that system after the last hang I'm sorry, I already rebooted the machine. > grep nr_isolated_anon /proc/zoneinfo > nr_isolated_anon 0 > nr_isolated_anon 0 > nr_isolated_anon 0 Same here, on both machines. Both between reboot and crash. > This patch may help you to reproduce much quicker, I applied the patch. I plan to boot this kernel within the next hour. > - sync_migration = !(gfp_mask & __GFP_NO_KSWAPD); > + sync_migration = true; This was already done in my 2.6.38.2? Thomas -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/