From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43471) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wr3UL-00082l-Ef for qemu-devel@nongnu.org; Sun, 01 Jun 2014 06:59:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Wr3UD-0006BG-Vf for qemu-devel@nongnu.org; Sun, 01 Jun 2014 06:59:41 -0400 Received: from mail-wg0-f51.google.com ([74.125.82.51]:43041) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Wr3UD-0006BB-QA for qemu-devel@nongnu.org; Sun, 01 Jun 2014 06:59:33 -0400 Received: by mail-wg0-f51.google.com with SMTP id x13so3873155wgg.10 for ; Sun, 01 Jun 2014 03:59:32 -0700 (PDT) Date: Sun, 1 Jun 2014 13:59:27 +0300 From: Muli Ben-Yehuda Message-ID: <20140601105927.GD2385@needle> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [Qemu-devel] Nested KVM is weird? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jun Koi Cc: linux-kernel@vger.kernel.org, "qemu-devel@nongnu.org" On Sun, Jun 01, 2014 at 05:54:25PM +0700, Jun Koi wrote: > So this means ESXi never uses VMResume/VMLaunch? How is this > possible, because it uses VMX for its implementation? ESXi will fall back to binary translation if it decides that it cannot use VMX for some reason. Look at the L2's log file inside ESXi and you will likely find some errors related to running nested, MSRs KVM does not emulate properly, or something else that causes ESXi to use binary translation for its L2. Cheers, Muli