From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH 0/8] KVM updates for 2.6.20-rc2 Date: Thu, 28 Dec 2006 17:25:23 +0200 Message-ID: <4593E1E3.2020800@qumranet.com> References: <20061228113038.GA16190@elte.hu> <4593B948.5090009@qumranet.com> <20061228133746.GC3392@elte.hu> <4593CB61.5050709@qumranet.com> <20061228135020.GA7606@elte.hu> <4593CD74.6060202@qumranet.com> <20061228140742.GA10033@elte.hu> <4593D243.1030301@qumranet.com> <20061228150104.GB16057@elte.hu> <4593DE1D.8010701@qumranet.com> <20061228151159.GA20279@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel Return-path: To: Ingo Molnar In-Reply-To: <20061228151159.GA20279-X9Un+BFzKDI@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Ingo Molnar wrote: > * Avi Kivity wrote: > > >>> hm. Could you try to just do a vmresume nevertheless - maybe it works >>> but is undocumented? >>> >> I'd hate to do that. There are at least three implementations of VT >> (PD, Core, Core2) and maybe more when steppings and microcode updates >> are considered. Not to mention having kvm fail when a new cpu is >> introduced is not a pleasant scenario. >> > > lets check whether it's even possible ... Then we could ask Intel to > clarify their position on this. I can see no real reason why a vmclear > should really make it impossible to re-use the already loaded context > data /on the same CPU/. And that is the important case. When we migrate > to another CPU we have to do a VMLAUNCH anyway, upon the first execution > of that context. > > There's a documented error number, 5, for "VMRESUME with non-launched vmcs". Furthermore, I checked, and it indeed doesn't work. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV