Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752224AbaDDDU2 (ORCPT ); Thu, 3 Apr 2014 23:20:28 -0400 Received: from aserp1040.oracle.com ([141.146.126.69]:41454 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751557AbaDDDUX (ORCPT ); Thu, 3 Apr 2014 23:20:23 -0400 Message-ID: <533E259B.4030507@oracle.com> Date: Thu, 03 Apr 2014 23:23:07 -0400 From: Boris Ostrovsky User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130805 Thunderbird/17.0.8 MIME-Version: 1.0 To: srostedt@redhat.com CC: xen-devel , Konrad Rzeszutek Wilk , David Vrabel , linux-kernel@vger.kernel.org Subject: Xen 32-bit PV regression Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Source-IP: ucsinet22.oracle.com [156.151.31.94] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Steven, Looks like commit 198d208df (x86: Keep thread_info on thread stack in x86_32) broke Xen's 32-bit PV guests. I poked a little at it and it seems that at least the ifdef in xen_cpu_up() needs to be adjusted to set up kernel_stack --- that allows CPUs to get going. This is not enough though (not particularly surprisingly) and we die a little later with #GPF in xen_iret. -boris -- 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/