Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754019AbZLVQVV (ORCPT ); Tue, 22 Dec 2009 11:21:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753982AbZLVQVS (ORCPT ); Tue, 22 Dec 2009 11:21:18 -0500 Received: from one.firstfloor.org ([213.235.205.2]:59132 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753693AbZLVQVP (ORCPT ); Tue, 22 Dec 2009 11:21:15 -0500 Date: Tue, 22 Dec 2009 17:21:10 +0100 From: Andi Kleen To: Anthony Liguori Cc: Andi Kleen , Gregory Haskins , Avi Kivity , Ingo Molnar , kvm@vger.kernel.org, Andrew Morton , torvalds@linux-foundation.org, "linux-kernel@vger.kernel.org" , netdev@vger.kernel.org, "alacrityvm-devel@lists.sourceforge.net" Subject: Re: [GIT PULL] AlacrityVM guest drivers for 2.6.33 Message-ID: <20091222162110.GG10314@basil.fritz.box> References: <4B2F9582.5000002@gmail.com> <4B2F978D.7010602@redhat.com> <4B2F9C85.7070202@gmail.com> <4B2FA42F.3070408@codemonkey.ws> <4B2FA655.6030205@gmail.com> <4B2FAE7B.9030005@codemonkey.ws> <4B2FB3F1.5080808@gmail.com> <4B300EF8.8010602@codemonkey.ws> <87637zdy9g.fsf@basil.nowhere.org> <4B30E654.40702@codemonkey.ws> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4B30E654.40702@codemonkey.ws> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 961 Lines: 23 > So far, the only actual technical advantage I've seen is that vbus avoids > EOI exits. The technical advantage is that it's significantly faster today. Maybe your proposed alternative is as fast, or maybe it's not. Who knows? > We think we understand why vbus does better than the current userspace > virtio backend. That's why we're building vhost-net. It's not done yet, > but our expectation is that it will do just as well if not better. That's the vapourware vs working code disconnect I mentioned. One side has hard numbers&working code and the other has expectations. I usually find it sad when the vapourware holds up the working code. -Andi -- ak@linux.intel.com -- Speaking for myself only. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/