Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756382Ab1EFNdZ (ORCPT ); Fri, 6 May 2011 09:33:25 -0400 Received: from mailout.rz.uni-frankfurt.de ([141.2.22.233]:36982 "EHLO mailout.rz.uni-frankfurt.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756259Ab1EFNdY (ORCPT ); Fri, 6 May 2011 09:33:24 -0400 Message-ID: <4DC40484.3050205@gmx.de> Date: Fri, 06 May 2011 16:24:04 +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> <4DC3B629.7010409@gmx.de> <4DC3B72A.302@gmx.de> In-Reply-To: <4DC3B72A.302@gmx.de> 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: 1374 Lines: 36 > Aaarg, wrong kernel tree. I patched and compiled 2.6.38.5. > Do you think it is important to stay with 2.6.38.2, after > we know 2.6.38.4 is also affected? I bootet 2.6.38.5.aa1 ("aa1" for the "make-it-worse-patch") but nothing happened within an hour. So I put some stress on the system: $ stress --cpu 80 --io 40 --vm 20 --vm-bytes 1280M --timeout 5s stress: info: [31924] dispatching hogs: 80 cpu, 40 io, 20 vm, 0 hdd The command _did_not_end_ after five seconds. I tried to kill it after ~15 minutes. I had no success killing it. "nr_isolated_anon" was "0" all the time. 'ps xal' hung its terminal. Just like 'pkill stress', 'pkill firefox', 'pkill thunderbird', 'pkill pkill' and 'pkill -9 stress'. top/iotop: http://pastebin.com/raw.php?i=BCtmHpmX ps xal: http://pastebin.com/raw.php?i=ED71cuKe zoneinfo: http://pastebin.com/raw.php?i=aBNjz1Up I hit SysRq-[lmtw] several times, you'll find all kernel messages (/var/log/messages) from boot to reboot here: http://pastebin.com/raw.php?i=VG28YRbi The system did not shutdown properly, I waited some time for sshd to stop and eventually hit SysRq-sub. 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/