Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756542Ab1EBHwd (ORCPT ); Mon, 2 May 2011 03:52:33 -0400 Received: from mail-ew0-f46.google.com ([209.85.215.46]:46020 "EHLO mail-ew0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754887Ab1EBHwc (ORCPT ); Mon, 2 May 2011 03:52:32 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; b=TtuFlfeoSdOVUpKAZTUJlOEXAtnDpJ90PO6BOXmUWepkfgG9V5ZrgpLAVAhN8F3KWQ +hNCmB/pmlhqiV6yZw37EVgG+LRqDKqaqNNhQ2H5LA6RaG7IO0LiH1RL4qjFDFvZmSim HDKuE4Z9D69aULKwNTx/5719rnh26rBqzAuf0= Message-ID: <4DBE62BA.6060306@gmail.com> Date: Mon, 02 May 2011 11:52:26 +0400 From: Cyrill Gorcunov User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.14) Gecko/20110223 Thunderbird/3.1.8 MIME-Version: 1.0 To: Gleb Natapov CC: Ingo Molnar , Avi Kivity , "H. Peter Anvin" , Thomas Gleixner , Suresh Siddha , LKML Subject: Re: [patch 0/2] x2apic optimization, round 4 References: <20110430171459.685415696@openvz.org> <4DBC6DC1.30900@redhat.com> <20110501164635.GA21833@elte.hu> <20110502053928.GB18376@redhat.com> <4DBE589C.1040103@gmail.com> <20110502074524.GD18376@redhat.com> In-Reply-To: <20110502074524.GD18376@redhat.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1281 Lines: 34 On 05/02/2011 11:45 AM, Gleb Natapov wrote: > On Mon, May 02, 2011 at 11:09:16AM +0400, Cyrill Gorcunov wrote: >> On 05/02/2011 09:51 AM, Cyrill Gorcunov wrote: >>> Yeah, i'll do so as only bring my laptop to life, I managed to kill >>> grub and can't restore it back for a while, will ping you back as soon >>> as I can. >>> >>> Sorry for top post. >>> >> >> I've managed to semi-restore it. Gleb, maybe there some additional >> parameter needed for kvm (except -cpu host,+x2apic) to make it work >> with cluster mode? I always see physical mode which was not the target >> of the patch series. >> > Hmm, +x2apic is enough to advertise x2apic presents to the OS. What > logic Linux uses to decide which mode to use? > > -- > Gleb. As far as I know interrupt remapping should be supported by kernel to switch to logic cluster mode, so I presume kvm doesn't support it yet and in result only physical mode is used. I think ACPI_SIG_DMAR is missed in acpi tables (actually I didn't find it in kvm sources). -- Thanks, Cyrill -- 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/