From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1VnawE-0003uK-6p for user-mode-linux-devel@lists.sourceforge.net; Mon, 02 Dec 2013 21:21:54 +0000 Received: from b.ns.miles-group.at ([95.130.255.144] helo=radon.swed.at) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1VnawC-0001P6-6r for user-mode-linux-devel@lists.sourceforge.net; Mon, 02 Dec 2013 21:21:54 +0000 From: Richard Weinberger Date: Mon, 02 Dec 2013 22:21:42 +0100 Message-ID: <7306830.yvMa5tydAA@sandpuppy> In-Reply-To: <529B8893.1030703@gmx.de> References: <5299F818.4070408@gmx.de> <1423288.L1vGMMJNcF@sandpuppy> <529B8893.1030703@gmx.de> MIME-Version: 1.0 List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net Subject: Re: [uml-devel] does 3.12.2 breaks UML with "con=xterm" ? To: Toralf =?ISO-8859-1?Q?F=F6rster?= Cc: UML devel Am Sonntag, 1. Dezember 2013, 20:05:55 schrieb Toralf F=F6rster: > On 12/01/2013 11:20 AM, Richard Weinberger wrote: > > I meant xterm for all consoles but con0... > > Such that you can trigger the crash but are still able to see the outpu= t. > = > Not sure if the 2 attached files contains useful info, but here they are: > = > The back trace of a hanging linux process : > $>sudo gdb /home/tfoerste/devel/linux/linux 27162 -n -batch -ex 'bt full'= > > bt > = > and stdout, error and bt of the core file from round #18 of this command : > = > $> I=3D0; while [[ : ]]; do ((I=3DI+1)); echo; echo; echo $I; date; for i= in > trinity.sh xterm linux port-helper start_uml.sh ; do pkill $i; done; rm -f > /mnt/ramdisk/core; start_uml.sh -r ~/virtual/uml/trinity -l > /home/tfoerste/devel/linux/linux -y 'con0=3Dfd:0,fd:1 con=3Dxterm' > 1>/mnt/ramdisk/$I.out 2>/mnt/ramdisk/$I.err; [[ -f /mnt/ramdisk/core ]] && > gdb --core=3D/mnt/ramdisk/core /home/tfoerste/devel/linux/linux -n -batch= -ex > 'bt full' > /mnt/ramdisk/$I.bt; sleep 10; done What I can see is that UML panic()ed because PTRACE_SETREGS is failing with = ESRCH. This means one of the UML SKAS0 helper threads got killed and is gon= e. This is very strange and makes me worry, because in this stage the helper i= s = in stopped state and cannot really die by an UML error. Looks like it got = killed from outside. Is your host setup 100% sane? :) Thanks, //richard ---------------------------------------------------------------------------= --- Rapidly troubleshoot problems before they affect your business. Most IT = organizations don't have a clear picture of how application performance = affects their revenue. With AppDynamics, you get 100% visibility into your = Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics P= ro! http://pubads.g.doubleclick.net/gampad/clk?id=3D84349351&iu=3D/4140/ostg.cl= ktrk _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel