From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:44927) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UPuQZ-0002Bv-7v for qemu-devel@nongnu.org; Wed, 10 Apr 2013 08:47:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UPuQU-0000bU-Mu for qemu-devel@nongnu.org; Wed, 10 Apr 2013 08:47:03 -0400 Received: from mx1.redhat.com ([209.132.183.28]:47140) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UPuQU-0000bH-G2 for qemu-devel@nongnu.org; Wed, 10 Apr 2013 08:46:58 -0400 Message-ID: <51655F3A.3070703@redhat.com> Date: Wed, 10 Apr 2013 14:46:50 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <51645345.60005@linux.vnet.ibm.com> <51651817.1050703@redhat.com> <51655E7D.2000308@linux.vnet.ibm.com> In-Reply-To: <51655E7D.2000308@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] latest master: major slowdown (something spinning?) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael R. Hines" Cc: "qemu-devel@nongnu.org" Il 10/04/2013 14:43, Michael R. Hines ha scritto: > Yes, it still happens at that commit string. > > Is there a specific test or trace I can provide to help track it down? You can try: 1) first, please post the exact QEMU command line your using; 2) put "strace -e poll" in front and post the final lines. Also post the output of "ls -l /proc//fd" where is QEMU's pid. 3) if the output of "strace -e poll" hangs, instead, run it under gdb and post a backtrace. Perhaps continue the process a few times and check if the backtrace remains the same or changes. Paolo