Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933233Ab2EWIXg (ORCPT ); Wed, 23 May 2012 04:23:36 -0400 Received: from merlin.infradead.org ([205.233.59.134]:33480 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757423Ab2EWIX3 convert rfc822-to-8bit (ORCPT ); Wed, 23 May 2012 04:23:29 -0400 Message-ID: <1337761402.9698.62.camel@twins> Subject: Re: [PATCH 1/2] sched: add virt sched domain for the guest From: Peter Zijlstra To: Liu ping fan Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, qemu-devel@nongnu.org, Ingo Molnar , Avi Kivity , Anthony Liguori Date: Wed, 23 May 2012 10:23:22 +0200 In-Reply-To: References: <1337754751-9018-1-git-send-email-kernelfans@gmail.com> <1337754751-9018-2-git-send-email-kernelfans@gmail.com> <1337759644.9698.49.camel@twins> Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Mailer: Evolution 3.2.2- Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 656 Lines: 18 On Wed, 2012-05-23 at 16:10 +0800, Liu ping fan wrote: > the movement of vcpu > threads among host nodes will break the topology initialized by -numa > option. You want to remap vcpu to nodes? Are you bloody insane? cpu:node maps are assumed static, you cannot make that a dynamic map and pray things keep working. Also, have you any idea how expensive it is to rebuild the topology vs migrating the vcpu? -- 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/