From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: Re: [PATCH 5/5] KVM: VMX: Give the guest ownership of cr0.ts when the fpu is active Date: Tue, 5 Jan 2010 22:40:30 -0200 Message-ID: <20100106004030.GB11233@amt.cnet> References: <1262190342-18611-1-git-send-email-avi@redhat.com> <1262190342-18611-6-git-send-email-avi@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Sheng Yang , Joerg Roedel , kvm@vger.kernel.org To: Avi Kivity Return-path: Received: from mx1.redhat.com ([209.132.183.28]:55729 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754627Ab0AFAlk (ORCPT ); Tue, 5 Jan 2010 19:41:40 -0500 Content-Disposition: inline In-Reply-To: <1262190342-18611-6-git-send-email-avi@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Wed, Dec 30, 2009 at 06:25:42PM +0200, Avi Kivity wrote: > If the guest fpu is loaded, there is nothing interesing about cr0.ts; let > the guest play with it as it will. This makes context switches between fpu > intensive guest processes faster, as we won't trap the clts and cr0 write > instructions. Looks fine.