From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755165Ab1HRHHY (ORCPT ); Thu, 18 Aug 2011 03:07:24 -0400 Received: from www.meduna.org ([92.240.244.38]:38695 "EHLO meduna.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751665Ab1HRHHX (ORCPT ); Thu, 18 Aug 2011 03:07:23 -0400 X-Greylist: delayed 2265 seconds by postgrey-1.27 at vger.kernel.org; Thu, 18 Aug 2011 03:07:23 EDT Message-ID: <4E4CB13C.7010502@meduna.org> Date: Thu, 18 Aug 2011 08:29:16 +0200 From: Stanislav Meduna User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.20) Gecko/20110804 Lightning/1.0b2 Thunderbird/3.1.12 MIME-Version: 1.0 To: Richard Weinberger CC: linux-kernel@vger.kernel.org, gunnarlindroth@hotmail.com, user-mode-linux-devel@lists.sourceforge.net Subject: Re: [uml-devel] Floating point problems on UML - help needed References: <4E4C2B6F.7000800@nod.at> In-Reply-To: <4E4C2B6F.7000800@nod.at> Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit X-Authenticated-User: stano@meduna.org X-Authenticator: dovecot_plain X-Spam-Score: -8.3 X-Spam-Score-Int: -82 X-Exim-Version: 4.69 (build at 30-Jan-2011 20:48:48) X-Date: 2011-08-18 08:29:28 X-Connected-IP: 95.105.188.244:2318 X-Message-Linecount: 31 X-Body-Linecount: 17 X-Message-Size: 1148 X-Body-Size: 511 X-Received-Count: 1 X-Recipient-Count: 4 X-Local-Recipient-Count: 4 X-Local-Recipient-Defer-Count: 0 X-Local-Recipient-Fail-Count: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 17.08.2011 22:58, Richard Weinberger wrote: > It looks like FPU registers get sometimes lost after switching between > two or more threads. This is probably a bug in UML I reported nearly three years ago. For me mode=skas0 worked aruond the issue. http://thread.gmane.org/gmane.linux.uml.devel/11824/focus=11840 You might try the patch posted in http://thread.gmane.org/gmane.linux.uml.devel/12158 (I don't have the environment to test it anymore) Regards -- Stano