From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [patch 2/2] target-i386: block migration and savevm if invariant tsc is exposed Date: Tue, 29 Apr 2014 08:22:36 +0200 Message-ID: <535F452C.1050302@redhat.com> References: <20140422203807.GJ3363@otherpad.lan.raisama.net> <20140422212759.GB28571@amt.cnet> <20140423011444.GL3363@otherpad.lan.raisama.net> <53597739.9000402@redhat.com> <20140424205720.GS3363@otherpad.lan.raisama.net> <535996EC.2080008@redhat.com> <20140424231834.GT3363@otherpad.lan.raisama.net> <535ACEB0.4020302@redhat.com> <20140428154652.GX3363@otherpad.lan.raisama.net> <535EA6C2.4020103@redhat.com> <20140428192337.GA3363@otherpad.lan.raisama.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Marcelo Tosatti , kvm@vger.kernel.org, qemu-devel@nongnu.org, Igor Mammedov , =?ISO-8859-1?Q?Andreas_F=E4rber?= To: Eduardo Habkost Return-path: Received: from mail-ee0-f41.google.com ([74.125.83.41]:53266 "EHLO mail-ee0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754784AbaD2GWl (ORCPT ); Tue, 29 Apr 2014 02:22:41 -0400 Received: by mail-ee0-f41.google.com with SMTP id t10so5555165eei.28 for ; Mon, 28 Apr 2014 23:22:40 -0700 (PDT) In-Reply-To: <20140428192337.GA3363@otherpad.lan.raisama.net> Sender: kvm-owner@vger.kernel.org List-ID: Il 28/04/2014 21:23, Eduardo Habkost ha scritto: > > Makes sense. Basically "-cpu host,migratable=yes" is close to > > libvirt's host-model and Alex Graf's proposed "-cpu best". Should we > > call it "-cpu best" and drop migratability of "-cpu host"? > > "-cpu best" is different from the modes above. It means "use the best > existing CPU model (from the pre-defined table) that can run on this > host". Yes, it's not exactly the same. In practice the behavior should be close. > And it would have the same ambiguities we found on "-cpu host": if a CPU > model in the table have invtsc enabled, should it be considered a > candidate for "-cpu best", or not? No CPU model in the table should have invtsc enabled. :) Paolo