Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753653Ab1EBIEq (ORCPT ); Mon, 2 May 2011 04:04:46 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34475 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751925Ab1EBIEm (ORCPT ); Mon, 2 May 2011 04:04:42 -0400 Date: Mon, 2 May 2011 11:04:22 +0300 From: Gleb Natapov To: Cyrill Gorcunov Cc: Ingo Molnar , Avi Kivity , "H. Peter Anvin" , Thomas Gleixner , Suresh Siddha , LKML Subject: Re: [patch 0/2] x2apic optimization, round 4 Message-ID: <20110502080422.GH18376@redhat.com> 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> <4DBE62BA.6060306@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4DBE62BA.6060306@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1427 Lines: 36 On Mon, May 02, 2011 at 11:52:26AM +0400, Cyrill Gorcunov wrote: > 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). > Ahh, definitely. I recall that now. -- Gleb. -- 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/