From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: Re: [PATCH] nVMX: Fix bug preventing more than two levels of nesting Date: Thu, 2 Jun 2011 23:06:24 -0300 Message-ID: <20110603020624.GC7272@amt.cnet> References: <20110602085452.589883806F0@moren.haifa.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Avi Kivity , kvm@vger.kernel.org, "Tian, Kevin" To: "Nadav Har'El" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:57081 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751401Ab1FCChw (ORCPT ); Thu, 2 Jun 2011 22:37:52 -0400 Content-Disposition: inline In-Reply-To: <20110602085452.589883806F0@moren.haifa.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: On Thu, Jun 02, 2011 at 11:54:52AM +0300, Nadav Har'El wrote: > The nested VMX feature is supposed to fully emulate VMX for the guest. This > (theoretically) not only allows it to run its own guests, but also also > to further emulate VMX for its own guests, and allow arbitrarily deep nesting. > > This patch fixes a bug (discovered by Kevin Tian) in handling a VMLAUNCH > by L2, which prevented deeper nesting. > > Deeper nesting now works (I only actually tested L3), but is currently > *absurdly* slow, to the point of being unusable. > > Signed-off-by: Nadav Har'El Applied, thanks.