From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: QEMU- 1CPU for guest while more cores used on host? Date: Thu, 12 Jul 2012 12:41:16 +0300 Message-ID: <4FFE9BBC.9000109@redhat.com> References: <20120704163533.F331C623@centrum.cz> <20120704214416.8A3EEC83@centrum.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: robert.kucera@centrum.cz, kvm@vger.kernel.org To: Javier Guerra Giraldez Return-path: Received: from mx1.redhat.com ([209.132.183.28]:44788 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757206Ab2GLJle (ORCPT ); Thu, 12 Jul 2012 05:41:34 -0400 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 07/04/2012 10:59 PM, Javier Guerra Giraldez wrote: > On Wed, Jul 4, 2012 at 2:44 PM, wrote: >> Thank you very much for your explanation, it makes sense :-) >> >>>2: why do you think "course amd-v+KVM is impossible to be used" ?? it does work very well >> Not for me, it is some old RedHat version that fails on boot under KVM, but works well (but slow) under Qemu. It is even unable to use more cores, so the limit in this case is one-core per guest for me. > > 1: kvm does work, and very well on AMD chips. "of course amd-v+KVM > is impossible to be used" is plain wrong > > 2: if an old OS doesn't work under kvm, but does under qemu, then you > can fiddle with kvm's cpu emulation flags. try "kvm -cpu ?" to see > what's available. What version is it? -- error compiling committee.c: too many arguments to function