From mboxrd@z Thu Jan 1 00:00:00 1970 From: Asdo Subject: Re: vhost disables kvm acceleration Date: Fri, 11 Feb 2011 14:56:04 +0100 Message-ID: <4D553FF4.3090400@shiftmail.org> References: <4D54334C.2080208@shiftmail.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit To: "'KVM-ML (kvm@vger.kernel.org)'" Return-path: Received: from mx2.isti.cnr.it ([194.119.192.4]:4247 "EHLO mx2.isti.cnr.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756372Ab1BKN41 (ORCPT ); Fri, 11 Feb 2011 08:56:27 -0500 Received: from SCRIPT-SPFWL-DAEMON.mx.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5-x5 #31825) id <01NXPD21WUF4PHQTE3@mx.isti.cnr.it> for kvm@vger.kernel.org; Fri, 11 Feb 2011 14:56:14 +0100 (MET) Received: from conversionlocal.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5-x5 #31825) id <01NXPD1Z5TSGPHRXQO@mx.isti.cnr.it> for kvm@vger.kernel.org; Fri, 11 Feb 2011 14:56:10 +0100 (MET) Received: from [192.168.1.107] (firewall.itb.cnr.it [155.253.6.254]) by mx.isti.cnr.it (PMDF V6.5-x5 #31826) with ESMTPSA id <01NXPD1V70JKPK93FD@mx.isti.cnr.it> for kvm@vger.kernel.org; Fri, 11 Feb 2011 14:56:04 +0100 (MET) In-reply-to: <4D54334C.2080208@shiftmail.org> Sender: kvm-owner@vger.kernel.org List-ID: On 02/10/2011 07:49 PM, Asdo wrote: > ... qemu-kvm-0.13.0 compiled from source... > > When I modprobe vhost_net and restart a VM having virtio networking, the > VM crawls at 1/100th of its normal speed. > [CUT] I just tried with the newest qemu-kvm 0.14.0-rc1, and exactly the same problem happens. Anyone has an idea? Thank you