Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S937094Ab3DIQgT (ORCPT ); Tue, 9 Apr 2013 12:36:19 -0400 Received: from smtp.eu.citrix.com ([46.33.159.39]:38023 "EHLO SMTP.EU.CITRIX.COM" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936464Ab3DIQgR (ORCPT ); Tue, 9 Apr 2013 12:36:17 -0400 X-IronPort-AV: E=Sophos;i="4.87,439,1363132800"; d="scan'208";a="3379571" Message-ID: <1365525374.17014.22.camel@zakaz.uk.xensource.com> Subject: Re: [Xen-devel] [PATCH-v2] xen: Don't call arch_trigger_all_cpu_backtrace in dom0(pvm) From: Ian Campbell To: Jan Beulich CC: xen-devel , Konrad Rzeszutek Wilk , "zhenzhong.duan@oracle.com" , "linux-kernel@vger.kernel.org" , Tamon Shiose , Feng Jin Date: Tue, 9 Apr 2013 17:36:14 +0100 In-Reply-To: <5162911202000078000CB38E@nat28.tlf.novell.com> References: <51610A25.4010301@oracle.com> <5162911202000078000CB38E@nat28.tlf.novell.com> Organization: Citrix Systems, Inc. Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.4.4-1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 876 Lines: 20 On Mon, 2013-04-08 at 08:42 +0100, Jan Beulich wrote: > >>> On 07.04.13 at 07:54, Zhenzhong Duan wrote: > > nmi isn't supported in dom0, fallback to general all cpu backtrace code. > > Since when is sending NMIs not supported, and since when is this > Dom0-specific? If you want to deal with this, you should do so > properly: Special case sending NMIs in the respective Xen specific > code (using VCPUOP_send_nmi), and carry this out in a way not > dependent upon running (un)privileged. You'd also need to implement the upcall support for receiving NMIs, which IIRC isn't yet done for pvops. Ian. -- 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/