From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=36233 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OPeZ7-0000sh-8X for qemu-devel@nongnu.org; Fri, 18 Jun 2010 12:37:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OPeZ6-0004V8-AF for qemu-devel@nongnu.org; Fri, 18 Jun 2010 12:37:13 -0400 Received: from thoth.sbs.de ([192.35.17.2]:16800) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OPeZ6-0004Uu-0G for qemu-devel@nongnu.org; Fri, 18 Jun 2010 12:37:12 -0400 Received: from mail1.siemens.de (mail1.siemens.de [139.23.33.14]) by thoth.sbs.de (8.12.11.20060308/8.12.11) with ESMTP id o5IGb9pX025958 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Fri, 18 Jun 2010 18:37:09 +0200 Received: from [139.25.109.167] (mchn012c.mchp.siemens.de [139.25.109.167] (may be forged)) by mail1.siemens.de (8.12.11.20060308/8.12.11) with ESMTP id o5IGb8sO016160 for ; Fri, 18 Jun 2010 18:37:09 +0200 Message-ID: <4C1BA0B4.2010803@siemens.com> Date: Fri, 18 Jun 2010 18:37:08 +0200 From: Jan Kiszka MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] smp broken in tcg mode with --enable-io-thread? List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel Hi, looks like SMP in emulation mode is broken once --enable-io-thread is turned on. Linux SMP guests lock up early during boot, often the whole QEMU process becomes uncontrollable after a while. That's at least the case here with x86 targets. The problem disappears when using -enable-kvm or building without --enable-io-thread. It's not on my critical path (ie. no time to go into details), I just stumbled over it and wanted to drop a note. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux